Division of Natural Sciences

How important is good sleep after a head injury?

Rachel Sauer — Tue, 14 Apr 2026 21:46:46 +0000

How important is good sleep after a head injury? Rachel Sauer Tue, 04/14/2026 - 15:46

Blake Puscher

Research suggests that disrupted or fragmented sleep after a traumatic brain injury not only interferes with the healing process but also has long-term consequences for brain health

Millions of Americans, and far more people worldwide, report sustaining a traumatic brain injury (TBI) each year. While detection and treatment of TBI have improved over time, this has resulted in new challenges, because survivors may face additional health problems over time as a consequence of their injuries. These problems can include cognitive impairment and even neurodegeneration, including Alzheimer’s. Considering this, there is an increased interest in what factors determine how well TBI patients recover.

Rachel Rowe, an assistant professor of integrative physiology at the University of Colorado Boulder, has investigated this question, along with a number of researchers from The Ohio State University and the University of Arizona College of Medicine, in a recent study linking low-quality sleep following traumatic brain injury to cognitive impairment, persistent inflammation and delayed healing.

Rachel Rowe, a �鶹��Ƶ assistant professor of integrative physiology, collaborated on research linking low-quality sleep following traumatic brain injury to cognitive impairment, persistent inflammation and delayed healing.

The study used mice as a controlled experimental model to examine how sleep fragmentation interacts with traumatic brain injury, following the National Institutes of Health Guidelines for the Care and Use of Laboratory Mice, and with approval from Ohio State’s Institutional Animal Care and Use Committee.

Sleep fragmentation, inflammation and microglia

The study did not look at total sleep loss, but instead at sleep fragmentation, which happens when sleep is repeatedly interrupted. Even brief awakenings can prevent the brain from staying asleep long enough to reach the deeper, more restorative stages of sleep. When sleep is broken up many times throughout the night, people may spend less time in these restorative phases, which are important for physical recovery and brain health. Unfortunately, fragmented sleep is common and can be caused by everyday factors such as noise, hospital monitoring, discomfort or changes in temperature.

“For instance,” Rowe says, if someone is in the hospital for a moderate brain injury, “then there are a lot of people coming in, they’re checking monitors, they’re doing activities that could disrupt the sleep of a person.”

Stress can also affect the quality of sleep. “We have got a lot of things in our society that disrupt our sleep,” Rowe says, and people do not always prioritize restful sleep after an injury. These types of disturbances may influence recovery following brain injury.

One reason for this is inflammation, which is a potential determiner of the long-term results of TBI, particularly whether it will result in neurodegeneration. Brain inflammation is an innate immune response initiated by cells called microglia. Similar to a fever, inflammation does not directly target infections, damaged cells or other threats but rather makes the body inhospitable to them. This allows for a quick response to potentially life-threatening challenges, but it can also damage the body if it goes on for too long. One reason that could happen is if the microglia are primed.

When the brain faces some kind of stress, like from an injury or from sleep fragmentation, the microglia become primed, meaning they respond more strongly to subsequent challenges.

“There is some memory in your immune system,” Rowe explains. “That is how vaccinations work. In the case of a brain injury, if it is mixed with sleep fragmentation, it is what we call a two-hit model.” When both stressors come in short succession, “that can change what the microglia are doing,” potentially resulting in a heightened or prolonged inflammatory response in the brain.

Preparation and testing

The mice were split into four groups. Some mice were given traumatic brain injuries using lateral fluid percussion injury, a well-established experimental model used to study TBI in rodents. Other mice were not given traumatic brain injuries, but were put through the same preparation process, so the only difference was that they went uninjured.

Additionally, some mice experienced sleep fragmentation while others did not. Ultimately, the groups were traumatic brain injury (TBI) with sleep fragmentation (SF), TBI without SF, uninjured with SF, and uninjured without SF. This design allowed the researchers to examine the independent and combined effects of injury and sleep disruption.

Sleep fragmentation was achieved through disturbances that happened automatically every two minutes for five hours per day during the early light phase, when mice normally obtain most of their sleep. All mice experienced a simulated light/dark cycle where each half lasted 12 hours. Sleep fragmentation began an hour before the end of the dark period and ended four hours after the beginning of the light period.

“Mice are nocturnal,” Rowe says, “so the study was designed to fragment their sleep right at the beginning of the light period, which is when mice normally get most of their sleep. In many ways, it’s similar to repeatedly waking a person just as they are trying to fall asleep at night.”

The mice’s sleep, including both when they were asleep and how long they stayed asleep, was measured using specialized piezoelectric sensors. This technology has been popularized recently through its use to generate electricity from people walking on piezoelectric tiles in places with heavy foot traffic in Japan. The sensors from the study work according to the same principle, transforming pressure from the mice’s movements into electrical signals.

“Sleep is a time when the brain can heal, and if that is disrupted, the healing process can be disrupted too,” says �鶹��Ƶ scientist Rachel Rowe. (Photo: Mart Production/Pexels)

“When a mouse drops into sleep,” Rowe explains, “their breathing gets really rhythmic at 3 hertz.” The frequency of pressure created by that breathing was distinguished from the way mice breathe when they are resting using an algorithm.

Sleep fragmentation continued for 14 days following injury. After this period, mice were allowed to recover with normal sleep conditions, and researchers evaluated behavioral and molecular outcomes. One of the behavioral assessments used was the Morris Water Maze, a common test of spatial learning and memory in rodents. In this task, mice learn to locate a hidden platform in a pool using spatial cues in the environment. Their ability to remember and efficiently navigate to the platform reflects spatial memory performance.

How good sleep improves outcomes

When tested in the Morris water maze, mice with TBIs who also experienced sleep fragmentation used random search strategies, indicating that they did not learn the cues or that they did not remember them. This means that sleep fragmentation after this type of injury could impair spatial learning and memory.

“If there are cognitive deficits, then the mouse is looking at those cues, but it does not know which one is near the platform. It is just searching randomly because it does not know what it is supposed to be doing,” Rowe says.

Researchers also looked at what was happening inside the brains of the mice. They found that when brain injury was combined with disrupted sleep, the brain showed stronger signs of inflammation and less activity in the genes involved in repairing and rebuilding connections between brain cells. These connections, called synapses, allow brain cells to communicate with each other and are important for recovery after injury. In other words, poor sleep after a brain injury appeared to increase inflammation while slowing some of the brain’s natural repair processes. In contrast, mice that had a brain injury but were able to sleep normally showed stronger signs of these repair pathways being activated.

There were 14 days for the mice to recover from sleep fragmentation before these results were measured, and they had 30 days to recover from the injury itself. This indicates that the consequences were long-term or chronic.

“When we are looking at rodents,” Rowe says, “their lifespan is much shorter than humans’.” In mouse studies, researchers often consider about one month after injury to represent a chronic time point. “So, when we see effects at 30 days in a mouse, it suggests that the biological changes are lasting well beyond the immediate injury period.”

While animal models cannot directly predict human timelines, these findings indicate that sleep disruption shortly after a brain injury may have long-term consequences for recovery.

“The chronic time period is when you start thinking about longer-term consequences of brain injury,” Rowe says. If inflammation persists beyond the initial injury phase, even at lower levels, it can create an environment that interferes with normal brain recovery. “You can start to see sustained inflammatory signaling, stress on neurons and changes that may contribute to neurodegenerative diseases over time.”

In summary, when combined with sleep fragmentation, TBI can weaken spatial learning and memory, cause persistent inflammation and prevent proper healing. If this inflammation continues for long enough, it can cause serious, permanent damage to the brain, potentially resulting in long-term neurological consequences or pathology associated with neurodegenerative diseases like Alzheimer’s.

“Sleep is a time when the brain can heal,” Rowe says, “and if that is disrupted, the healing process can be disrupted too.” Ultimately, the study shows that “if you are not protecting sleep after a concussion or brain injury, there are some long-term consequences through inflammatory pathways, and that can delay your healing process.”

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Research suggests that disrupted or fragmented sleep after a traumatic brain injury not only interferes with the healing process but also has long-term consequences for brain health.

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Students create better ways to communicate science

Rachel Sauer — Fri, 10 Apr 2026 15:58:11 +0000

Students create better ways to communicate science Rachel Sauer Fri, 04/10/2026 - 09:58

Rachel Sauer

In a program with Northglenn High School students, Institute for Behavioral Genetics researchers ask for creative and innovative ideas on how to talk about science

With all due respect to the dedicated and passionate scientists at the University of Colorado Boulder, but Northglenn High School students Joseph Zuniga and Alecsander Morain’s main goal was to “convert this study into a manageable format for normal people,” Morain explains.

The study in question was a recently published paper finding that children’s early interactions with music shape—but don’t determine—their musical lives decades later. The research, based on 40 years of data from surveys of 1,900 people in The Colorado Adoption/Twin Study of Lifespan Behavioral Development and Cognitive Aging (CATSLife), also considered shifting genetic and environmental influences.

Northglenn High School senior Carla Camacho holds the graphic novel that she and her fellow students created from an Institute for Behavioral Genetics study.

“It took quite a few readings to understand what the study was saying,” Zuniga says, and Morain adds, “and even then, we get to the results and there’s this graph that makes zero sense.”

Daniel Gustavson, first author of the study and a �鶹��Ƶ assistant research professor in the Institute for Behavioral Genetics (IBG), was standing fairly near as Zuniga and Morain expressed their honest opinions, but no hard feelings. That insight was why the two young men, along with more than 100 of their fellow Northglenn High School students, were gathered at the Sustainability, Energy and Environment Complex (SEEC) Thursday morning.

They were participating in a program envisioned and led by Analicia Howard, a psychology and neuroscience PhD student and Gustavson’s research colleague at the IBG. The program, which is funded by a Public and Community-Engaged Scholarship grant, is part of a broader research study called Comunidad, which is centered at IBG but has collaborators across campus and at Washington University.

“We were designing this study so that the community we’re most interested in, which is here in Colorado, is more involved in that development part of the study—that they are engaged in every aspect of research,” Howard explains, adding that a lot of effort in the first several years of community-based research like theirs should be focused on building partnerships.

“An issue with academia in general is there’s such a tough history with a lot of scientific research, especially if it includes human subjects in marginalized communities. So, we’re wanting to connect with the community in a way that’s mutually beneficial and leverage community partnerships in the future with established, trusted organizations. Schools felt like a natural segue to reaching broader audiences and meeting our goal of communicating science better. We were asking, ‘How do we communicate in a way that’s engaging, in a way that reaches the communities we’re interested in reaching?’”

They thought: Let’s ask the students.

Explaining science better

The idea is straightforward: select a handful of IBG research papers and ask students, working in groups, to choose one and create a project focused on how to better communicate the science to their broader community.

Howard and Gustavson approached Northglenn High School because CU Science Discovery and the Institute of Arctic and Alpine Research had previously worked with students and faculty there, “so there was already an established relationship and trust,” Howard says.

As a STEM high school, Northglenn requires every class to have an aspect of STEM, “but we were still thinking in terms of the accessibility of the science when we were choosing the papers, because the theme of genetics can be difficult to parse if you’re fairly new to it,” Gustavson says.

Meet the student award winners

Award for scientific accuracy

Ricardo Ayala
Brandon Diaz Renteria
Maddy Duncan
Alex Dunn
Caleb Ewudzi-Acquah

Award for innovation

Alex Trillo Salais
Will Watt
Joey Marquez
Angel Mendoza Maldonado
Frankie Pillar Cornell

Award for accessible presentation

Carla Camacho
Jane Heslop
Kimberly Olivas
Aylin Ramirez

The IBG scientists selected six of their papers that centered on topics that might be interesting to teenagers—video games, music, mental health—and presented them to Amy Murillo’s and Cheyenne Rost’s multicultural literature classes.

“Every year we incorporate a practice-based learning project into the curriculum, and we thought this was a real-world opportunity that the kids could grab onto,” Murillo says. “It’s been part of our research and analysis unit, so for the first few weeks we were talking about things like misinformation and fake news and why it’s important to read these studies.”

Then Murillo and Rost and about 120 students—all seniors except for one junior graduating early—arrayed across four classes spent a week reading a practice study.

“We were going through it step by step, learning how to read a scientific paper and trying to give them the autonomy to make mistakes and learn from them,” Rost says. “We were talking about things like how to understand results and how a layman would understand the jargon.”

Howard and Gustavson also visited the classes to answer questions once students had chosen the papers on which they’d focus their projects.

Thinking creatively about science

As for the projects, “we knew we had to make the paper simpler,” says Joselyn Ramirez, who along with classmate Genessis Garcia chose an IBG-led study finding that playing video games didn’t show consistent associations with impulsivity, but rather screentime in general is associated with impulsive tendencies in adulthood.

“There was a lot of stuff where I had to go back and go back and go back because I didn’t understand it,” Ramirez says, and Garcia adds that if they, as students at a STEM high school, had such difficulty understanding the study, what would it be like for a non-scientist community member to try reading it?

So they created interactive videos, which they showed on a screen they set up on their display table Thursday morning.

Joselyn Ramirez (left) and Genessis Garcia (right) with an interactive display board based on Institute for Behavioral Genetics research finding that playing video games doesn't show consistent associations with impulsivity.

Zuniga and Morain also thought to adapt the music research to a format Murillo and Rost teach their students—a recipe, with ingredients, steps and finished product. Students also were encouraged to think creatively and in multimedia terms as they designed their projects, so Zuniga and Morain created a survey on a poster board on which event attendees could mark the kind of instrument they’d like to play.

For Carla Camacho, Jane Heslop, Kimberly Olivas and Aylin Ramirez, thinking creatively about communicating the science meant writing, designing and drawing a graphic novel. They also chose the video games and impulsivity research and created a story about two twins, Samantha and Sammy, and how each is affected by screen time.

“The study is based on twin research, so we thought that’s where we should start,” says Camacho, who drew the final graphic novel.

“There was a lot of rewriting and rewording, because we were summarizing and trying to use simpler words,” says Heslop, who drew the original storyboards for the novel. “But I think I have better time management and better communication skills now, because we had to think about what we really needed to say and how we should say it in a way that people would understand.”

The students’ projects were judged Thursday by volunteer IBG faculty members and graduate students, and part of the judges’ assessment was how clearly students expressed their ideas on how to communicate science better.

“Definitely more visual appeal,” says Chloe Ibarra, who with classmate Alejandra Franco also chose the video games and impulsivity study. “If you look at the study, there’s nothing that really catches your eye, but if you look at ours,” and she indicates a poster on an easel behind them that takes a vision board approach to communicating the science, “there’s color everywhere and it’s interesting to look at.”

For Isaac Aranda and his project partners Josue Sanchez and Leo Lin, who also chose the video games and impulsivity study, a key to communicating science is using language that people will understand: “We had to look a lot of stuff up,” Aranda says, “and I don’t know if everyone would have the patience to do that.”

But it’s important to find the right words and the right way to talk about the science, Sanchez says, because “this study isn’t saying video games are bad, it’s really saying we shouldn’t be on our phones all the time.”

Alejandra Franco (left) and Chloe Ibarra (right) with their project that emphasizes the need for visual interest when communicating science.

Institute for Behavioral Genetics scientist Daniel Gustavson (right) talks with Northglenn High School students about their science communication project.

IBG research associate Jeff Lessem (left) talks with Kimberly Olivas (center) and Carla Camacho (right) about their science communication project, which won the award for most accessible presentation.

Alecsander Morain (left) and Joseph Zuniga (right) with their project communicating research finding that children’s early interactions with music shape—but don’t determine—their musical lives decades later.

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In a program with Northglenn High School students, Institute for Behavioral Genetics researchers ask for creative and innovative ideas on how to talk about science.

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Top image: Northglenn High School students explain their science communication project to IBG judges. (All photos by Arielle Wiedenbeck/PACES)

Documentary shares secrets of the bees

Rachel Sauer — Fri, 03 Apr 2026 14:21:04 +0000

Documentary shares secrets of the bees Rachel Sauer Fri, 04/03/2026 - 08:21

Rachel Sauer

�鶹��Ƶ researcher Samuel Ramsey served as science advisor and a producer, alongside executive producer James Cameron, for Secrets of the Bees, premiering this week on National Geographic, Disney+ and Hulu

Would you like to hear a secret about bees?

Not many people know this, but bees in Southeast Asia have figured out that water buffalo dung isn’t the only pungent substance that will keep hornets away.

See, Vespa mandarinia—more sensationally known as the murder hornet—can wreak havoc on a bee colony. One or two dozen hornets can wipe out an entire colony, although bees have developed some pretty awesome defenses. One of these involves vibrating their flight muscles to create a convection oven effect that essentially cooks invading hornets.

Samuel Ramsey, a University of Colorado Boulder assistant professor of ecology and evolutionary biology, served as science advisor and producer, alongside executive producer James Cameron, on the documentary Secrets of the Bees. (Photo: Shin Arunrugstichai)

However, sometimes a hornet can escape bees’ defenses and flee the hive—but not before leaving a figure-eight pattern of pheromones outside the hive that acts as a beacon to future hornet invasions. Bees deduced that they’d need something even more pungent to spread at the hive entrance to mask the hornet pheromones, “and for a long time we thought they were just relying on water buffalo dung for that purpose,” explains Samuel Ramsey, a University of Colorado Boulder assistant professor of ecology and evolutionary biology.

But bees are smart. They figured out they could chew the leaves of an extremely pungent plant to spread at the hive entrance, “which was something we’d never seen before,” Ramsey says.

He and his colleagues discovered this behavior in pursuit of Secrets of the Bees, the fifth installment of the Emmy Award-winning “Secrets of…” series premiering this week on National Geographic, Disney+ and Hulu.

Ramsey, a National Geographic Explorer, served not only as science advisor and featured expert, but as a producer alongside executive producer James Cameron.

Yes, that James Cameron.

“It’s always a pleasure to say I produced a documentary with James Cameron,” Ramsey says with a laugh. “It’s opened up a lot of opportunities to talk with people about bees and together making sure that there’s unity in concept—so we’re not talking in terms of ‘right’ bees and ‘wrong’ bees, but we’re talking about what we can do to support all bees’ survival.”

Communicating science (and bees)

This all came about, in part, because “bees really, really need our help,” Ramsey says, a fact he quickly realized as a lifelong, self-described “bug nerd” observing how human-caused changes to the natural world are affecting bee populations.

During his undergraduate and graduate studies, Ramsey focused on diseases and parasites affecting bees, particularly the Varroa mite, and began raising bees so that he could study them. When he came to �鶹��Ƶ, that move included installing a research and observation hive in his lab in the Jennie Smoly Caruthers Biotechnology Building.

Because his research interests also include symbiotic relationships, it’s perhaps no surprise that Ramsey the scientist is also Ramsey the science communicator: passionate about describing the beauty, wonder, fragility and resiliency of the natural world to broad and interested—although often non-scientific—audiences. He has been at the vanguard of using social media to tell the dynamic stories of science.

Thanks in part to this outreach, documentarians and filmmakers began requesting his expertise and consultation. He worked on the documentary My Garden of a Thousand Bees and has discussed insects on NPR, CBS and many other outlets, in addition to becoming a National Geographic Explorer. Still, he says, it’s a little surreal to get that call proposing a collaboration with the director of Titanic and Avatar.

“(Cameron) has 300 hives at his farm in New Zealand, so this really has been a labor of love for him,” Ramsey says.

Making a difference for bees

The framework of Secrets of the Bees is to show a hive of honeybees preparing for winter, but that simple concept took Ramsey and his collaborators around the world, exploring bee colonies as the dynamic cities they are and bees not as mindless automatons, but as intelligent, adaptive creatures that form complex societies.

The filmmakers used groundbreaking technologies, including cameras similar to those used in endoscopes, to peer inside hives for never-before-seen views of bees living, working and playing together. Yes, bees play, Ramsey says, and it’s a wonderful thing to see.

The cutting-edge filmmaking technology allows viewers to see close-up, time-lapse scenes of larva growing into adult bees, as well as the funerary process of pushing dead bees from the hive. “The advent of universal childcare is what allowed this to be one of the most successful species on the planet,” Ramsey says, “which you really see up-close in the film.”

He adds that it was important to him that the documentary not sugarcoat the peril in which Earth’s more than 20,000 bee species currently exist, including calamitous population declines associated with climate change, monoculture crops, parasites, chemical use and habitat loss, among other causes.

“But the film also emphasizes hope, because there are things every one of us can do to support bees,” Ramsey says. “Something as simple as planting a window box with flowers can make a big difference to a lot of bees.”

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�鶹��Ƶ researcher Samuel Ramsey served as science advisor and a producer, alongside executive producer James Cameron, for Secrets of the Bees, premiering this week on National Geographic, Disney+ and Hulu.

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Under the dome: Why two longtime Boulder residents keep coming back to Fiske Planetarium

Rachel Sauer — Mon, 30 Mar 2026 23:49:30 +0000

Under the dome: Why two longtime Boulder residents keep coming back to Fiske Planetarium Rachel Sauer Mon, 03/30/2026 - 17:49

Bradley Worrell

Although Drew Simon and Ron Marks did not attend �鶹��Ƶ, they have a deep appreciation for the university—and for Fiske in particular

When Drew Simon and Ron Marks walk out of Fiske Planetarium after a show, they intuitively know what’s coming next. It’s not applause or conversation or even a specific memory of a particular song or image.

It’s a feeling.

As the two longtime friends step back into the Boulder night, eyes adjusting, ears recalibrating, both of them are grinning from ear to ear. That part never changes.

“Every time we went,” Simon says, “we knew we’d walk out smiling.”

Longtime friends and Boulder residents Ron Marks (left) and Drew Simon are avid fans of the Fiske Planetarium, having attended dozens of shows over the past five years. They’ve seen some shows multiple times.

That quiet certainty—more than any single performance—is what has kept Simon and Marks returning to Fiske for years. Not because they planned to. Not because either of them studied astronomy or worked in the arts or even attended the University of Colorado Boulder.

And not because they expected to find something transformative inside the planetarium they had driven past many times. Instead, it began with curiosity and a misunderstanding.

Deep roots in the community

Marks, 80, and Simon, 71, have been friends for more than two decades, both with deep roots in the Boulder community stretching back at least four decades. Introduced to each other through a mutual friend—Marks’ housemate—they bonded over shared interests, which include hiking, live music, art and cultural events.

“There was a time when we were probably hippies, or hippie‑adjacent,” Simon says with a laugh. Over that time, �鶹��Ƶ has been a constant presence in their life—even though neither man attended the university.

Marks has been retired for several years from a career as an electric engineer for Lefthand Design in Niwot. Simon recently retired from his job as a principal at BSW Wealth Partners in Boulder. Like many longtime Boulder residents, Simon’s relationship with the university grew organically, through connections to the Leeds School of Business and the Conference on World Affairs. Also, his oldest son attended �鶹��Ƶ, further weaving the university into his family’s life.

Yet none of that connected either man directly to the Fiske Planetarium. Neither of them had a lifelong fascination with celestial mechanics or immersive films projected on a dome ceiling. Their first visit came the way meaningful discoveries do: by accident.

“As for Fiske specifically, we didn’t have some grand plan. It was probably curiosity,” Simon says, reflecting back. “We may have seen a flyer for the planetarium or something in Boulder Weekly back when that still existed. Or we may have simply asked, ‘What’s going on at the planetarium?’”

Whatever the case, Simon and Marks decided to check it out.

All the pretty lights

Their first show at Fiske remains memorable largely because of how unprepared they were for it. The show listing read “Pretty Lights”—and Simon assumed that meant exactly what it sounded like: a show featuring visually pleasing lights. He had never heard of the musical act called Pretty Lights and didn’t realize it was the stage name of the performer.

“That probably shows how naïve we were at the beginning,” Simon says with a laugh. That misunderstanding says something about where Simon and Marks were at the time. Not insiders. Not trend hunters. Just two curious locals trying something unknown to them.

They saw that first show more than five years ago—and since that time the two men have made up for lost time by seeing as many shows as possible. Still, an exact count is difficult to quantify, Simon says, because the experience resists counting. Some nights, they attend two shows, back to back. At dome film festivals hosted by Fiske, the two men might watch eight or more short films in a day. So, does that count as one event—or eight?

Simon says he’s never kept track “because it never occurred to me that one day someone would ask.” He estimates today that it could range anywhere between 30 and 60 shows.

What he remembers clearly is that—especially in the early years—he and Marks went a lot. They were enthralled.

So many shows to choose from

Marks says the variety of the programming offered by Fiske is a big part of the draw.

“We’ve done all of them,” Simon agrees. “We’ve attended traditional planetarium shows focused on astronomy—black holes, galaxies and large-scale maps of the universe. We’ve done laser shows and we’ve attended a lot of Liquid Sky performances.

“Early laser shows were sometimes underwhelming,” he confesses, “but the technology and the people running it have improved dramatically. Today, I wouldn’t dismiss a laser-only show the way I might have several years ago.”

“We’ve done all of them. We’ve attended traditional planetarium shows focused on astronomy—black holes, galaxies and large-scale maps of the universe. We’ve done laser shows and we’ve attended a lot of Liquid Sky performances," says Drew Simon. (Photo: Fiske Planetarium)

For Simon and Marks, Liquid Sky performances—the hybrid music-and-visual experiences—have remained their favorite over the years. Simon says that’s because these shows are not canned visuals synced to a soundtrack but instead are created in real time by artists operating sophisticated software during the performance.

Watching the artists (who refer to themselves as “navigators) felt like watching someone paint while the painting formed—”except the brush was digital and the canvas was the dome itself,” Simon says.

Over time, Marks and Simon became familiar faces at Fiske events. After shows, they stayed behind to talk with the navigators, who would ask what they liked about the performance and what might make the event even better. Did a sequence move too fast? Did a visual linger too long? Was there enough variety?

In an informal way, Marks and Simon became in-house critics, always with a focus on helping the experience become better. That sense of exchange and mutual engagement with the navigators deepened their connection to Fiske.

Music was the thread that tied many of these performances together. Simon and Marks say they’ve seen many Fiske shows more than once.

“We’ve seen a lot of Grateful Dead shows—probably more than any other artist. Pink Floyd would be second,” Simon says. “Some of that has to do with our musical preferences, and some of it has to do with relationships with navigators, who would tell us, ‘I’m navigating this show tonight—you should come.’”

“Each performance—even with the same music—felt different,” Marks adds. “The visuals changed. The pacing changed. The interpretation changed, so it was never the same twice.”

A place of musical discovery

Fiske also became a place of musical discovery. Simon says he and Marks had never heard of Tame Impala before attending a Liquid Sky show featuring the band’s music. Since then, they’ve seen that program at least three times.

The planetarium didn’t just reinforce existing preferences—it expanded them, Simon says.

At one point, Simon’s involvement with Fiske crossed a small but meaningful threshold. During conversations with one of the navigators years back, he mentioned that the program could benefit from different music. One idea that emerged from that discussion was a Jimi Hendrix show—and the navigator asked Simon if he’d curate the music. He agreed.

Simon says selecting the tracks, shaping the flow and keeping the program within the typical Liquid Sky timeframe gave him a new appreciation for the craft behind the scenes. The Hendrix show doesn’t run often, but Simon says he considers it a personal footnote in Liquid Sky history.

Film under the dome

If Liquid Sky showed Simon what live‑generated visuals could be, a single dome film revealed what else was possible. That moment came for Simon when Fiske hosted Samskara, a fully produced film by the visual artist Android Jones. Unlike the performances Simon had seen before, Samskara was created specifically for dome presentation. Although the film was only about 35 minutes long, the experience was, in Simon’s words, like going from black‑and‑white TV to color. It completely reframed his understanding of the medium.

“At its heart, Fiske isn’t just about astronomy or music—it’s an immersive experience. It’s an art form that’s still finding its full expression.”

The two men have seen Samskara at least three times. While it was more expensive compared to standard Fiske programming, Simon says he never questioned whether it was worth it.

The film demonstrated that the dome wasn’t just a venue for live experimentation; it was also a legitimate canvas for fully realized cinematic works. That realization carried forward into other film experiences, including Mesmerica and Beautifica by James Hood and collaborators, both of which Simon and Marks saw multiple times.

Then there was Dome Fest West, a judged film festival dedicated entirely to dome films. Fiske hosted it for multiple years, and Simon and Marks attended at least two full festivals, spending entire weekends immersed in the medium. Some films were short and abstract, others narrative or technically focused. There were panel discussions, awards and artists present. For Simon, it was one of the best experiences money could buy.

Fiske audience also evolves over time

Meanwhile, the audience has changed over time.

“When we first started going, there might be 10 people in the entire theater. And sometimes, we were the only ones there,” Simon says. “Now, shows sell out.”

Also, audiences now often applaud between songs—something Simon says would have felt out of place in a traditional planetarium setting.

The environment remains distinctive: everyone seated, the room dark and quiet, eyes turned upward. Simon says he always appreciated when navigators asked people not to use their phones, knowing how disruptive even a small phone screen can be in that darkness. While that messaging has become less consistent, Simon says he finds that audiences are generally respectful and engaged.

So why keep coming back?

Part of the answer is simple: Simon and Marks say they love the planetarium as a resource. Living in a university town is often talked about in abstract terms, but Simon says Fiske represents a tangible way to engage with �鶹��Ƶ. Simon and Marks also regularly attend performances through the CU School of Music, and Simon says Fiske feels like a natural extension of that cultural life.

Another part is commitment. Marks and Simon became Fiske members because they wanted to support the planetarium. Membership made them feel connected, not just as consumers of entertainment but as participants in a community invested in what Fiske could become.

And finally, there is fascination.

“At its heart, Fiske isn’t just about astronomy or music—it’s an immersive experience,” Simon says. “It’s an art form that’s still finding its full expression.”

Each visit to Fiske carries the quiet promise that something new will unfold overhead.

“The people at Fiske are wonderful and the programming is thoughtful. And every time we go, we leave smiling,” Simon says. “It’s not hard to say, ‘Let’s go to a planetarium show tonight,’ because we know it will be a meaningful experience.”

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Although Drew Simon and Ron Marks did not attend �鶹��Ƶ, they have a deep appreciation for the university—and for Fiske in particular.

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Does cannabis cause anxiety? It depends

Rachel Sauer — Fri, 27 Mar 2026 14:54:20 +0000

Does cannabis cause anxiety? It depends Rachel Sauer Fri, 03/27/2026 - 08:54

Blake Puscher

Research suggests that cannabis may cause anxiety when it is strong enough or taken in large enough quantity to produce an immediate effect

Cannabis is an increasingly common drug, with more than 64 million people reporting use in 2024 in the United States alone, according to Statista—more than double the amount in 2010. Despite this, its effects are not well understood. For example, some people use cannabis for relief from anxiety, but there is also evidence that it can cause or worsen anxiety depending on the individual, how much is taken and other factors.

Determining what effect cannabis has on anxiety requires a better understanding of how it affects the endocannabinoid system. To this end, researchers from CUChange (Center for Health and Neuroscience, Genes and Environment), including Renée Martin-Willett, Carillon Skrzynski, Ethan Taylor and Cinnamon Bidwell, with assistance from Jost Klawitter and Cristina Sempio of the University of Colorado Anschutz, assessed the biochemical changes that occurred when people with anxiety took different cannabis products.

Endocannabinoids

The endocannabinoid system is a biological system that extends throughout the whole body. “It’s not just in our brains,” Martin-Willett says; “it’s also in the peripheral nervous system, which is just a fancy way of saying it’s all over the body.”

Renée Martin-Willett (left) and Carillon Skrzynski (right), along with their CUChange research colleagues, assessed the biochemical changes that occurred when people with anxiety took different cannabis products.

The system uses two receptors: CB1 and CB2. In biology, receptors are chemical structures that contribute to a biological effect when they bind with compatible chemical messengers. Whether a receptor and messenger will be able to bind depends on their structure, similar to a lock and key, except that the structure is chemical. When a messenger binds to a receptor and the receptor uses the signal (by relaying or amplifying it, for example), the messenger is considered an agonist—as opposed to an antagonist, which is like a key that fits in a lock but, instead of opening that lock, prevents the correct key from being inserted.

Unlike keys, which either work or do not, chemical messengers can have effects of different strength. For example, THC (delta 9-tetrahydrocannabinol), the main psychoactive component of cannabis, is only a partial agonist of CB1. According to Martin-Willett, CB1 is mostly concentrated in the brain, whereas CB2 is mostly in the gut. The other main component of cannabis is CBD (cannabidiol), which modulates CB1 and CB2, making the effects they produce when activated by agonists weaker without preventing agonists from binding to the receptors.

These chemicals act on the endocannabinoid system because they have chemical structures like endocannabinoids, which are neurotransmitters that are produced by the human body. The two most-studied endocannabinoids are AEA (N-arachidonoyl ethanolamide) and 2-AG (2-arachidonoylglycerol), and they are the focus of this study for that reason.

“2-AG has a really high concentration, and it’s mostly in the brain,” Martin-Willett explains. “It binds with CB1. Then AEA, which has much lower concentrations, is more in the periphery. It’s implicated in implantation and the hormonal cycle for women and is increasingly being linked to anxiety and other kinds of mood disorders.” AEA is associated with positive feelings, and the receptors it binds with, CB1 and CB2, are thought to play a role in whether people view their environment in a positive or negative way. Therefore, AEA may ameliorate feelings of anxiety.

Although some simple facts about the endocannabinoid system are understood, many details remain unexplained. In particular, there is a question as to the effect of cannabis on the endocannabinoid system. This includes how THC and CBD may affect the concentration of AEA and 2-AG in the body, which has implications for what effect cannabis has on anxiety and other aspects of people’s mental state. “Sometimes I tell people the endocannabinoid system is like the Mariana Trench of biomedicine,” Martin-Willett says, “because it was only really discovered in the mid-‘90s. How did we not know about this entire, full-body system until the ‘90s?”

The study

Because this study was intended to determine the effect of cannabis use on anxiety, the participants all had scores on the GAD-7 (generalized anxiety disorder) screener that indicated at least mild anxiety. The participants were split up into four groups: one-fourth of the participants were in the control group (meaning they did not use any cannabis), one-fourth used THC-dominant products, one-fourth used CBD-dominant products and one-fourth used products that combined THC and CBD in a 1:1 ratio.

Some people use cannabis for relief from anxiety, but there is also evidence that it can cause or worsen anxiety depending on the individual, how much is taken and other factors. (Photo: Unsplash)

The study found that the people in the THC-dominant and 1:1 groups had higher AEA levels than those in the control group when cannabis was taken during an acute administration session (meaning in a single dose that is strong enough to produce an immediate effect as opposed to administration over the course of weeks). These results are consistent with the hypothesis that the effects of THC on AEA are caused by competitive binding between the two chemicals at CB1.

“THC might affect AEA in a couple of different ways,” Martin-Willett explains. “THC will bind to CB1 in a ‘normal’ way at the synapse, but it will also permeate the lipid bilayer of the cell itself. The results from our paper support that first idea that THC is competitively binding with AEA at CB1. It is kind of fighting AEA to bind and winning more often than AEA is.”

The basic idea is that whenever THC binds to a receptor, it takes away an opportunity for AEA to bind, causing fewer receptors to be activated by AEA. Even though THC and AEA are both partial agonists of CB1, it is possible that the effects they create upon binding are different. “One idea,” Martin-Willett continues, “is if more AEA makes you less anxious, and in the moment, THC binds competitively with CB1 and keeps AEA from interacting, maybe that is contributing to the paranoia or anxiety after acute use of THC. That is speculative, though. We do not have good human studies on that yet.”

2-AG levels did not change when administered acutely. This could be because 2-AG has higher concentrations in the human body than AEA, making the consequences of introducing THC less significant in the short term. However, in the THC-dominant group, it increased from baseline after two weeks before decreasing to reach a near-baseline level by week four. While AEA is thought to be associated with positive feelings, the association between 2-AG is mostly unknown.

Catching up with the market

Since the Controlled Substances Act of 1971, cannabis has been classified as a Schedule I drug in the United States, which means that it faces special restrictions on the federal level. That may change soon because of the Department of Health and Human Services’ 2023 recommendation that cannabis be reclassified as a Schedule III drug and because of President Trump’s 2025 executive order on the subject. Despite this, and even in states where cannabis has been legalized, the current classification puts limits on studies like this one.

For example, second author Carillon Skrzynski says, “In a lot of our studies, we are not allowed to tell people how much to use, or what to use in some circumstances. That really puts a damper on any kind of causal conclusion.” Ordinarily, scientists keep all variables that could affect the phenomenon they want to understand constant except for one, called the independent variable, which they vary in a controlled manner. This makes the relationship between the independent variable and the phenomenon clear. If multiple variables change at the same time, it becomes almost impossible to say how much each variable contributes to the phenomenon, or even if they would have an effect individually.

“I think there are two really exciting areas that the field needs to move towards,” Martin-Willett adds. “Number one, we need to account for age. We know that the endocannabinoid system changes a lot when we get older. People talk about reduced tone, which just means you have fewer receptors, but we do not really know what that means—if it has a greater effect or a lower effect. And I think the other piece of it is sex assigned at birth. Like I mentioned, more and more the endocannabinoid system is being viewed like the endocrine system, or like the hormonal system, and these things are intertwined, especially AEA and the reproductive system.”

Martin-Willett and Skrzynski both plan to look into these areas. Additionally, their center, CUChange, has multiple studies running and is actively looking for research participants. That is important not only because the different effects of cannabis are unknown, but because it is already being used on a large scale. “A lot of this is really unregulated right now,” Martin-Willett says, “and I think the market is way ahead of the science. People are already using cannabinoids for anxiety, for sleep, for pain, for other kinds of mood problems, and so they can make their voices heard to the government, that this is someplace they want research money to go.”

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Research suggests that cannabis may cause anxiety when it is strong enough or taken in large enough quantity to produce an immediate effect.

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�鶹��Ƶ scientists honored as AAAS fellows

Rachel Sauer — Thu, 26 Mar 2026 14:20:24 +0000

�鶹��Ƶ scientists honored as AAAS fellows Rachel Sauer Thu, 03/26/2026 - 08:20

Scholars Rebecca Safran and Tin Tin Su recognized by the American Association for the Advancement of Science for excellence in research, teaching and interpreting science to the public

Rebecca Safran, a professor of ecology and evolutionary biology who has led groundbreaking research on the evolution of new species, and Tin Tin Su, professor and chair of molecular, cellular and developmental biology whose research is leading to novel cancer therapies, have been named fellows of the American Association for the Advancement of Science (AAAS).

The AAAS fellowship is among the highest honors in the scientific community, recognizing a distinguished cohort of scientists, engineers and innovators who “have been recognized for their achievements across disciplines, from research, teaching and technology to administration in academia, industry and government, to excellence in communicating and interpreting science to the public,” AAAS officials note.

“This year’s AAAS Fellows have demonstrated research excellence, made notable contributions to advance science and delivered important services to their communities,” says Sudip S. Parikh, AAAS chief executive officer and executive publisher of the Science family of journals. “These Fellows and their accomplishments validate the importance of investing in science and technology for the benefit of all.”

Rebecca Safran is a professor of ecology and evolutionary biology who has led groundbreaking research on the evolution of new species.

A study of swallows

Safran, whose passion for biology took root in a plant taxonomy class during her undergraduate studies at the University of Michigan, and her research team, study the evolution of new species, focusing on the causes and consequences of individual variation across different scales of time and space.

Because studying the formation of new species can be difficult—given that most species are millions of years old and what caused them to diverge from their ancestors often can’t be determined—Safran and her team study barn swallows, a very closely related group of populations of migratory birds that are currently diverging. This allows Safran and her team to study the process of speciation in real time.

Safran won a National Science Foundation Early Career Development award to study speciation in barn swallows across their entire, expansive breeding range throughout the Northern Hemisphere and Middle East. During the COVID-19 pandemic, when it wasn’t possible to conduct research in other countries, Safran and her research team began focusing on the rapid decline in the population of barn swallows and its implications. For their work, Safran and team study the birds using a highly integrative approach including behavioral, physiological and genetic perspectives.

Among other discoveries, Safran and her team found that sexual selection, or the process by which organisms choose mates based on traits they find attractive, drives the emergence of new species. Her team’s research has been published in more than 120 peer-reviewed journals, including Science, Nature and Current Biology. She also co-edited a recent book on speciation (2024, Cold Spring Harbor Press).

“None of this work is possible without the incredible collaboration with students, colleagues at CU and around the world, private landowers who allow us to study populations of barn swallows on their properties and continuous funding support by the National Science Foundation and other agencies,” Safran says. “I am especially honored to have worked with so many talented undergraduate, graduate and postdoctoral students."

Studying fruit flies to treat cancer

Su, who attended Woodstock School in Mussoorie, Uttarakhand, India, credits her experiences there, in part, with helping her understand that her ideal environment is one in which “you do respect the elders or people who have had more experience or authority. But at the same time, if it doesn't seem right, you question it.”

Tin Tin Su is a professor and chair of molecular, cellular and developmental biology whose research is leading to novel cancer therapies.

Throughout her career, Su and her research colleagues have sought to develop new ways of attacking cancer. Through research on how tissues and organs in fruit flies regenerate after being damaged by X-rays, they synthesized the chemical SVC112, which helps prevent cancer cells from regrowing following radiation exposure. Su and her colleagues focused on the fruit fly because this insect shares more than 70% of disease-relevant genes with humans.

SVC112 is based on the chemical bouvardin found in the firecracker bush (Bouvardia ternifolia) that grows in the Southwest United States and Mexico. Su and her colleagues discovered that bouvardin can prevent regeneration of tissues in fruit flies.

More recently, Su, who also is a member of the CU Cancer Center, and her colleague Antonio Jimeno, co-leader of the CU Cancer Center’s Developmental Therapeutics Program, used SVC112 to target cancer stem cells in head and neck cancers. They are in the process of applying to the FDA to test SVC112 in human trials.

Su also has participated in the �鶹��Ƶ Community Perspectives Program, conducting outreach in several rural Colorado communities that led to a research collaboration with Colorado State University Pueblo to assess the effect of heavy metals on the genome in fruit fly and human cells.

“I do what I do because I love science,” Su says. “The potential to help cancer patients in Colorado and beyond makes it even better. So, to be named a AAAS Fellow is really the cherry on top!”

About the AAAS Fellowship

The AAAS began naming fellows annually in 1874, people nominated by the AAAS Council to recognize those whose “efforts on behalf of the advancement of science or its applications are scientifically or socially distinguished.”

Safran and Su join a cohort of more than 80 �鶹��Ƶ faculty members who previously received the honor, as well as a broader cadre that includes Thomas Edison, W.E.B DuBois, Maria Mitchell, Steven Chu, Ellen Ochoa and Irwin M. Jacobs.

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Scholars Rebecca Safran and Tin Tin Su recognized by the American Association for the Advancement of Science for excellence in research, teaching and interpreting science to the public.

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Young musicians tend to keep playing later in life

Rachel Sauer — Wed, 25 Mar 2026 18:38:58 +0000

Young musicians tend to keep playing later in life Rachel Sauer Wed, 03/25/2026 - 12:38

Clint Talbott

But their path is not linear, with many starting, stopping and resuming in adulthood; genetics and home environment play differing roles, �鶹��Ƶ research finds

Those who played a guitar, piano or ukulele as kids are more likely than average to play as an adult—though perhaps not as likely as you might expect.

That’s one finding of a new study led by University of Colorado Boulder researcher Dan Gustavson, which sheds light on how children’s early interactions with music shape—but don’t determine—their musical lives decades later.

The findings, recently published in the journal Developmental Science, draw on nearly 40 years of data from surveys of 1,900 people in The Colorado Adoption/Twin Study of Lifespan Behavioral Development and Cognitive Aging (CATSLife).

�鶹��Ƶ researcher Dan Gustavson led a recently published study that sheds light on how children’s early interactions with music shape—but don’t determine—their musical lives decades later.

Gustavson and his colleagues analyzed measures of “music engagement”—being interested in and skilled at musical instruments—of participants at ages 7, 10, 12 and 16, then compared them with the same individuals’ music-playing habits in their 30s. The result: Early music engagement predicts adult instrument playing, but far less strongly than expected.

Many participants started and stopped music throughout adolescence, and some took up music later in life.

“We found more change than stability,” says Gustavson, assistant research professor at �鶹��Ƶ’s Institute of Behavioral Genetics. “Kids don’t follow a single linear path. A lot of them start, stop and restart music as they grow.”

The study also highlights shifting genetic and environmental influences. In childhood, shared environmental factors—such as family resources, school access and neighborhood programs—played a major role in determining who “engaged” with music. By adolescence, however, genetic influences grew stronger, probably reflecting teens’ increasing autonomy in the activities they pursue.

“Adolescence is a time where you start to get a lot more freedom over your own behavior,” Gustavson says. “Your interests become less influenced by your parents and more by what you’re exploring. People who are just more naturally tuned to figuring out musical instruments are going to find themselves in those environments more.”

Gender differences emerged as well. Girls were somewhat more likely to engage with music in childhood, though boys showed slightly higher heritability for music engagement at younger ages. These differences disappeared by adolescence.

“Girls were more likely to play music than boys . . . but in boys, there was slightly higher heritability in childhood for music engagement. That actually evened out by adolescence,” Gustavson says.

Playing and listening

Perhaps surprisingly, listening to music in adulthood was largely unrelated to playing music in childhood. Playing and listening appear to be distinct traits. “Passive listening is its own thing,” Gustavson notes. “It doesn’t track neatly with who played instruments as kids.”

“Music may be uniquely positioned to support language development, cognitive growth and even resilience against risky behaviors. But kids can’t benefit from it if they don’t have access,” says �鶹��Ƶ researcher Dan Gustavson. (Photo: Dzmitry Shepeleu/Unsplash)

Gustavson is now exploring whether music engagement at key developmental windows—especially around age 12—may help protect teens from later substance use. Preliminary evidence suggests early adolescent music engagement is linked to lower rates of alcohol use and fewer substances tried in late adolescence, five to 10 years later.

He notes that scientists take a developmental perspective on how behaviors can affect health. “You can’t just look at one time point when you want to understand how behaviors relate to important health outcomes. You have to think about the developmental stage. . . . There may be specific windows where things matter a lot more.

“Adolescence is when people start experimenting, and putting yourself in a music environment might be most protective during this time,” he says. Ultimately, Gustavson hopes the research might strengthen arguments for restoring music programs in schools.

“Music may be uniquely positioned to support language development, cognitive growth and even resilience against risky behaviors,” he says. “But kids can’t benefit from it if they don’t have access.”

CATSLife twin studies and other longitudinal twin research help scientists discern the influences of genetics vs. environmental factors by comparing identical twins (who have 100% shared genes) and fraternal twins (with 50% shared genes).

As a student, Gustavson became interested in the power of such studies: “I had friends growing up who were twins, and we always talked about what makes twins similar or different. Taking courses here, I found it really exciting to unpack which aspects of things are explained by genetics and which by the environment.”

Music itself strikes a chord with Gustavson, who plays guitar and drums and was a professional musician for a couple of years before he earned his PhD. “I’ve been really grateful that I’ve been able to integrate this into my research program now.

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But their path is not linear, with many starting, stopping and resuming in adulthood; genetics and home environment play differing roles, �鶹��Ƶ research finds.

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Eyes in the sky focus on elephants

Rachel Sauer — Mon, 23 Mar 2026 14:22:27 +0000

Eyes in the sky focus on elephants Rachel Sauer Mon, 03/23/2026 - 08:22

Tiffany Plate

�鶹��Ƶ PhD student Liam Jasperse-Sjolander is helping elephant behavioral observation get off the ground—and into the air above Africa

Walking through the quiet, lush rainforests of Gabon, on Africa’s equatorial west coast, forest elephants have a knack for appearing and disappearing just as quickly.

Because they travel in small groups through the thick jungles, forest elephants are much less noticeable—and thus much harder to observe—than their cousins that live on the wide-open African savannas.

For Liam Jasperse-Sjolander, a University of Colorado Boulder environmental studies PhD student, that quiet grace is part of the magic of his fieldwork. “They can be very silent, very unassuming,” he says. “Suddenly you’ll see this gigantic creature in the forest, and the next instant they’re gone.”

�鶹��Ƶ PhD student Liam Jasperse-Sjolander has been studying elephant behavior since 2016. (Photo: Alain-Djessy Banguiya)

Jasperse-Sjolander has spent years traveling through Gabon and other African countries tracking elephant behavior in a variety of ways: using radio collars, camera traps and, more recently, drones.

And he’s been publishing his findings along the way. In 2025 alone, Jasperse-Sjolander co-authored three publications, one based on data from dung collection in Gabon and two on the benefits and potential ramifications of drones in observations.

Now he’s working to collate years of field data collected from these studies—identifying behavioral patterns and their ecological implications—for his dissertation, and pondering what’s next in his research.

Discovering Africa

Growing up, Jasperse-Sjolander didn’t always know where his love of the outdoors would take him. “I just wanted to do something outside,” he says of his childhood in Colorado. “I was either going to work in science or go run off into the woods to fend for myself.”

Ultimately, he chose the former, earning an undergraduate degree in environmental biology from McGill University in Montreal. During those years he got his first taste of fieldwork, spending a semester learning about conservation and field ecology in Kenya, Uganda and Tanzania—and falling in love with Africa. Why?

“From a conservation perspective I think that many areas still feel wild, with so many megafauna worth protecting. And I love the beautiful diversity and vibrancy of cultures and traditions there.”

That’s why, after finishing his undergraduate studies, he headed right back, signing on as a research assistant for a Duke University PhD student Amelia Meier, who was tracking forest elephants in the Wonga Wongué Presidential Reserve in Gabon. Jasperse-Sjolander was eager to get in the field and watch the elephants with his own eyes, and was pleased to see that Meier was interested in mixing old-school observation methods with some new technologies.

“Her approach was really interesting and it kind of opened my eyes to studying behavior in the field in new ways,” he says.

On the ground in Gabon

That approach required a few radio collars—and sorting through an awful lot of dung. Jasperse-Sjolander and his colleagues would track the forest elephants’ movements, then follow along at a safe distance to capture dung samples for later lab analysis.

The data they collected showed the makeup of the fruits and seeds the elephants were consuming in the forest, and laid the foundation for an October 2025 paper published in the journal Oikos. The article sought to model how elephants may play a role in reseeding forests with trees and other large plant species that can consume large amounts of carbon dioxide.

Forest elephants, once thought to be a subspecies of African savanna elephants, were recognized as their own species in 2021 by the International Union for Conservation of Nature. Part of Liam Jasperse-Sjolander’s work is to help establish a behavioral baseline. “It's really hard to protect a critically endangered species if you don't know what they're doing and where they're going.” (Photo: Liam Jasperse-Sjolander)

The results of the study showed wide variety in when and how the elephants disperse seeds, making it difficult to use a one-size-fits-all model for predicting how they will impact their local ecology.

“A lot of climate initiatives will put an emphasis on elephants being ‘gardeners of the forest,’” says Jasperse-Sjolander. These initiatives’ models assume that if elephants are in the area, carbon will in turn increase by a certain amount. “But if that’s not true in a country the size of Gabon, that’s certainly not true on an international scale.”

While there is still more work to do to better understand this interaction, Jasperse-Sjolander’s work in the field was pivotal to reaching this next step in the research.

In the air in Kenya

Now Jasperse-Sjolander is taking his fieldwork to new heights by studying how drones can be used to track elephants’ movements, eating patterns and group sizes—without disturbing the creatures. “This new format opens up a lot of doors for seeing behavior that we haven’t seen before,” says Jasperse-Sjolander.

In 2024 Jasperse-Sjolander was contracted by Save the Elephants, an African non-governmental organization dedicated to the preservation of elephants and their habitats, to analyze how drones may impact different elephant groups. “Before we start using drones to study behavior, we have to make sure that we're not negatively affecting the elephants,” says Jasperse-Sjolander.

Jasperse-Sjolander analyzed the behavioral data Save the Elephants had captured during trial runs of the drones with 14 distinct elephant groups in the Samburu National Reserve in Kenya. The results, which were published in November 2025 in Scientific Reports, were positive: While some of the elephants exhibited a few changes in baseline behavior—like eating a bit less or staying more alert—after multiple trial runs the group seemed generally unphased.

The researchers performing the trials adhered to some general common-sense protocols about how far to stay from the group.

“We always would launch the drone at least a half kilometer away from the group, since it's really at takeoff that it's the most noisy and disturbing,” says Jasperse-Sjolander. “Then we flew at a height of 120 meters (around 400 feet), which is the maximum height you can fly drones in Kenya. So we're basically as far away as we can be.”

Even at that distance, the latest high-tech drones can still capture high-resolution images; researchers can also use the drones’ embedded infrared camera to follow the elephants at night. That camera allowed researchers to follow some elephants for 24 hours and learn more than they ever knew about the animals’ sleep patterns.

Even at heights of 400 feet, drones’ high-resolution lenses allow researchers to capture important information, such as back length measurements, a common indicator of age. (Photo: Save the Elephants)

“Previously we’d estimated that they only sleep for 15 minutes, but we found that sometimes they’ll all lay down together in a dry riverbed and sleep for a full two hours,” says Jasperse-Sjolander.

“We didn’t really know before what elephants were doing at night,” he adds.. “And so we’re uncovering all these layers of elephant behavior that can help the population.” Knowing where they spend most of their time, when they leave an area and when they are most vulnerable to poaching are all important considerations in the business of saving elephants, he explains.

In May 2025, Jasperse-Sjolander and the Save the Elephants team also published a small field note in the journal Pachyderm about how to maximize these drones’ capabilities, even when there are restrictions on their flight (e.g., in Kenya, where drones are highly regulated). “It can still be a very useful piece of equipment,” says Jasperse-Sjolander, noting that the device’s infrared camera and potential for measuring elephant shoulder height (another common indicator of age) can all be used on the ground, and can take the place of other, more expensive equipment.

In the lab in Colorado

Now, with so much fieldwork data under his belt, Jasperse-Sjolander is back at CU working to finalize his dissertation, comparing behavior between forest and savanna elephants. He’ll build on his master’s coursework (also earned at �鶹��Ƶ), which looked specifically at the different behaviors of forest elephants in Gabon—which is 90% forest, 10% savanna—when they’re in the two different biomes.

“Most forest elephant groups are just a mother around their calf and maybe a few relatives,” says Jasperse-Sjolander, explaining that the patchily distributed fruit trees that the elephants feed on are not enough to sustain groups much larger than that.

But, when they emerge from the forest, these groups connect with other small groups.

“Elephants are still very social, and it’s important for them to keep those links and have that larger association network,” says Jasperse-Sjolander, adding that the elephants’ time in the savanna is also important for the exchange of information.

Jasperse-Sjolander’s dissertation will expand the boundaries of his comparison of forest and savanna elephant behaviors to take more of a continent-wide approach to understanding the variations between and among them.

And after that? Jasperse-Sjolander is hoping to head back to Africa for a longer contract with a non-governmental organization like Save the Elephants, where he can use learnings from his PhD to advance our understanding of elephant behavior even further.

“I like just being in Africa and being in the field,” he says. While many researchers in his field go back and forth between the U.S. and Africa, “I like to live and embody the places I study.”

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�鶹��Ƶ PhD student Liam Jasperse-Sjolander is helping elephant behavioral observation get off the ground—and into the air above Africa.

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Can concussions cause fear of movement?

Rachel Sauer — Wed, 18 Mar 2026 17:12:43 +0000

Can concussions cause fear of movement? Rachel Sauer Wed, 03/18/2026 - 11:12

Alexandra Phelps

�鶹��Ƶ neuroscience student Alexander Wiegman’s research finds that a history of concussions doesn’t necessarily lead to later kinesiophobia

Stadium lights stream over the field. It’s Friday night, and over the course of the football game touchdowns have been scored, penalty flags have flown and countless plays have been run. However, on the next play, something goes awry. A player is down on the field and they’re helped to the medical tent. Upon further observation, medics diagnose a concussion.

In sports, injury is always a possibility. A misstep or collision can cause an athlete to need a period of recovery, changing not only their physical health but also their relationship with movement. For Alexander Wiegman, a former football player and an undergraduate University of Colorado Boulder neuroscience student, a similar reality became personal and, later, scientific.

Alexander Wiegman, a former football player and an undergraduate University of Colorado Boulder neuroscience student, studies how concussions can lead to kinesiophobia, a debilitating fear of movement that usually results from an injury or re-injury.

Wiegman’s recently published research in the journal Brain Injury examines how concussions can lead to kinesiophobia, a debilitating fear of movement that usually results from an injury or re-injury.

Individuals who’ve experienced kinesiophobia, a fear of movement due to the possibility of pain, can have decreased physical activity levels, stemming from the fear and hesitancy of activity. Research such as Wiegman’s, which looks into the mental recovery from a concussion, seeks to predict which patients are more likely to develop severe kinesiophobia. Building a broader understanding of the mental effects of concussions can help providers to optimize care and provide recommendations for how individuals can recover from kinesiophobia.

Working with Dr. David Howell, Dr. Julie Wilson and the team of researchers in the Colorado Concussion Research Laboratory (CCRL) at the University of Colorado Anschutz, Wiegman initially predicted that if a patient experienced a lower initial symptom severity as well as a lower number of prior concussions, they would have lower kinesiophobia scores. However, the research findings suggested the opposite.

From the field to the lab

Wiegman played football for as long as he can remember, and like many athletes, he experienced injuries, including concussions. Even after going through his recovery care with the help of a concussion specialist, he was still unsure about moving his body again. This fear inspired him to begin his research.

As an undergraduate, he has had an opportunity to bring his experience with concussion care full circle. Working alongside his co-researchers, Wiegman transformed his initial experience with concussions into a hypothesis. He notes that he was allowed “to take the reins with my project. We began by discussing my experience with concussions because I've been through it. The fear of movement and the fear of getting back to activity is something that I really struggled with.

“I was always a math and science person, and by the time I got to high school, I knew I wanted to study something in that realm. But by the time I got to college, I knew I wanted to go into medicine.”

Understanding the fear of movement

Kinesiophobia is a response that has been documented across many types of injuries, though it's been less studied in people diagnosed with concussions. With numerous injuries, kinesiophobia can contribute to other symptoms even after the injury itself has healed. Understanding kinesiophobia is important because it can affect the severity of initial injuries, including concussions. A patient’s quality of life and recovery times are all aspects that can be impacted.

To better understand this gap in kinesiophobia research with concussions, Wiegman collaborated with CCRL researchers. Participants completed one assessment within 21 days of their injury and another between 30 and 90 days post-concussion.

“It is possible that individuals who have experiences with prior injuries understand the recovery process and have developed resilience against the negative aspects of fear of movement,” says �鶹��Ƶ researcher Alexander Wiegman. (Photo: John Torcasio/Unsplash)

From a clinical perspective, "the first thing you think about is getting someone physically healthy," Wiegman explains, adding that he and his co-researchers examined "the broader idea of mental health after concussions" in an attempt to enhance the care that can be provided after a concussion. Wiegman and his research colleagues looked at the period post-concussion because typically this is when the physical injury has recovered. Focusing on this window of time allowed them to better understand how patients were recovering both physically and mentally from their injury.

What looking under the hood revealed

Contrary to Wiegman’s hypothesis that patients who had a more extensive injury history would exhibit more severe kinesiophobia, these patients actually displayed less-severe kinesiophobia.

However, after analyzing patient data, Wiegman concluded that those who had previously recovered from injuries were less fearful in moving their body again. “It is possible that individuals who have experiences with prior injuries understand the recovery process and have developed resilience against the negative aspects of fear of movement,” he says.

The research found that there was no evidence to suggest that age, sex, or prior concussions were independently associated with kinesiophobia. Wiegman concluded that prior injury and the experience of recovery may be one of the most influential factors in how a patient may or may not develop kinesiophobia.

Looking ahead

As a senior, Wiegman is pursuing a route to medical school. Interning as an athletic trainer with �鶹��Ƶ’s track and football teams, as well as working as a phlebotomist, he’s had hands-on experience with athletes and their injuries. As Wiegman was completing his research and defending his senior thesis, he also studied for and took the MCAT.

Wiegman hopes to learn more about the relationship between kinesiophobia and concussions. “In my mind, I wanted to find some definitiveness, especially with this being intended to be used in a clinical setting; I really wanted to have the answer,” he says. “It was hard to wrap my head around [the fact] that we have data, but we don’t have an answer per se.” He explains that this research is a step in the right direction and hopes to continue on to further research of kinesiophobia and other mental health disparities following concussions.

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�鶹��Ƶ neuroscience student Alexander Wiegman’s research finds that a history of concussions doesn’t necessarily lead to later kinesiophobia.

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Top photo: John Torcasio/Unsplash

Project harnesses next-generation satellites to preserve Arctic sea ice

Rachel Sauer — Tue, 17 Mar 2026 22:11:24 +0000

Project harnesses next-generation satellites to preserve Arctic sea ice Rachel Sauer Tue, 03/17/2026 - 16:11

�鶹��Ƶ researcher Ivy Tan leads a project recently funded by Ocean Visions that aims to assess whether mixed-phase cloud thinning is a viable method for cooling the Arctic

Ivy Tan, a University of Colorado Boulder assistant professor of physics, recently was awarded funding from Ocean Visions for a project she leads that is assessing whether mixed-phase cloud thinning is a viable method for cooling the Arctic and restoring sea ice.

Tan’s project is one of six funded by Ocean Visions, a nonprofit ocean conservation organization pursuing solutions to counter and reverse climate impacts on ocean health. The selected projects are being funded through Ocean Visions’ Arctic Sea Ice Restoration Research Fund, which was created to identify, prioritize and support research on cutting-edge ideas to slow the loss of Arctic sea ice.

“Arctic summer sea ice is a critical foundation of the global ocean and climate system, and its rapid loss is creating a series of severe risks to nature and people across the planet,” says Brad Ack, Ocean Visions CEO. “These research projects, and others to come, are intended to help answer the glaring question: Is there anything else we can do to forestall these potentially irreversible outcomes?”

“This support from Ocean Visions will allow us to better understand the radiative influence of Arctic clouds on the rapidly warming Arctic by spectrally fingerprinting the far infrared radiative signature of clouds using state-of-the-art technology,” Tan says.

Tan and her research colleagues—Sebastian Schmidt, a �鶹��Ƶ professor of atmospheric and oceanic sciences, Michael Diamond at Florida State University and Colten Peterson with the NASA Goddard Space Flight Center—are developing a new, satellite-based Arctic cloud observation product using recently launched satellites with unprecedented routine measurements of far-infrared radiation (NASA’s PREFIRE CubeSats), as well as collocated radar, LiDAR and imager instruments.

“We will compare the satellite observations to those made with ESA/JAXA’s recently launched EarthCARE satellite and an aircraft (as part of NASA’s ARCSIX campaign),” Tan and her colleagues explain. “These comparisons will be used to produce and validate an algorithm that provides information on cloud properties and their radiative effects on the Arctic surface on a broad spatial scale. Our framework will uniquely take into account the influence of the vertical thermal stratification of the Arctic atmosphere helping us to determine where and when mixed-phase cloud seeding would, or would not, have potential as a climate intervention strategy.”

Among their aims is to help make mixed-phase cloud thinning a more viable method for cooling the Arctic and restoring sea ice. For this to happen, however, “there would need to be enough of the right type of cloud present to be thinned by seeding (clouds containing supercooled liquid water), at the right time (polar night), to produce the desired climate forcing (cooling). Unfortunately, accurately measuring these clouds, especially at night, is very challenging with current satellite products,” the researchers explain.

Ocean Visions selected the six projects through a competitive process, including review by an independent international expert panel. The research to be conducted will provide the foundation for future work, if warranted, to further advance knowledge and address ecological, social and ethical dimensions, as well as develop guidance on safeguards or stage gates for future research, according to Ocean Visions.

“The research supported through the Arctic Sea Ice Restoration Research Fund prioritizes scientific merit, interdisciplinary approaches, and careful risk assessment through a rigorous review,” says Dr. Ginny Selz, Ocean Visions senior program director. “We are excited to watch this research progress and see how it expands our understanding of potential approaches to protect and restore Arctic sea ice.”

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�鶹��Ƶ researcher Ivy Tan leads a project recently funded by Ocean Visions that aims to assess whether mixed-phase cloud thinning is a viable method for cooling the Arctic.

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