Division of Natural Sciences

Undergraduate Isabella Perrin named 2026 Cech Fellow

Rachel Sauer — Wed, 03 Jun 2026 23:12:39 +0000

Undergraduate Isabella Perrin named 2026 Cech Fellow Rachel Sauer Wed, 06/03/2026 - 17:12

The newly established fellowship, named in honor of �鶹��Ѱ��Boulder Professor Thomas Cech, gives students opportunities for research, professional mentorship and career exploration

Isabella Perrin, a �鶹��Ѱ�� undergraduate student studying molecular, cellular and developmental biology and public health, has been selected as one of 176 inaugural Cech Fellows by the Howard Hughes Medical Institute (HHMI).

The fellowship, awarded to an inaugural cohort of undergraduates from 109 institutions in 36 states and territories, is named in honor of Nobel laureate Thomas Cech, a �鶹��Ѱ��Boulder distinguished professor of biochemistry, former HHMI president and current HHMI investigator.

The Cech Fellows will spend nine weeks conducting this summer conducting hands-on research with HHMI scientists at universities and research institutions across the country, as well as at HHMI’s Janelia Research Campus in Virginia. They will contribute to research while gaining professional mentorship and exploring potential careers in biological and biomedical research.

"I’ve always believed that getting students into real research environments early is one of the most powerful things we can do for them and for science,” said Cech. “I’m deeply honored that this program carries my name, and I look forward to seeing what this first cohort of Fellows will go on to achieve.”

Leslie Vosshall, HHMI vice president and chief scientific officer, noted that a single summer in the right lab can kickstart a scientific career: “By asking real questions alongside scientists at the top of their fields, this year’s Cech Fellows will have the opportunity to see what a life in science actually looks like.”

Perrin, who is working with researchers at the University of California Berkeley this summer on immunology research about the pathways and mechanisms that relate to autoimmune and inflammatory disorders, has previously conducted RNA research with Robin Dowell, a professor of molecular, cellular and developmental biology, and Mary Ann Allen, a research associate professor with the BioFrontiers Institute.

“As a Cech Fellow, I’m honored and excited to join a diverse community with engaging and curiosity-filled science research,” Perrin says. “I value this opportunity not only to learn from mentors and peers about how to conduct meaningful research but also to engage in research that, at its core, is based in bettering individuals’ quality of life.

“I hope to learn and use new skills to contribute to the field in a rigorous manner, and to use a creative mindset to approach challenging questions. I love learning about the capabilities and quirks of the immune system and am thrilled to be a part of a lab that focuses on applying this work to human health conditions.”

Summer research experiences are “often where undergraduates discover their passion for scientific inquiry,” said Joshua Hall, HHMI lead senior director and scientific program officer at HHMI. “The Cech Fellows Program gives talented students direct access to some of the most exciting science happening anywhere in the country, and we’re thrilled to welcome this inaugural cohort.”

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The newly established fellowship, named in honor of �鶹��Ѱ��Boulder Professor Thomas Cech, gives students opportunities for research, professional mentorship and career exploration.

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�鶹��Ѱ��Boulder debuts $33.5 million renovation to general chemistry labs

Rachel Sauer — Tue, 02 Jun 2026 14:45:03 +0000

�鶹��Ѱ��Boulder debuts $33.5 million renovation to general chemistry labs Rachel Sauer Tue, 06/02/2026 - 08:45

The recently completed project increases the number of labs from 12 to 14 and includes a multitude of modernization and safety improvements

The �鶹��Ѱ�� Department of Chemistry recently debuted a new suite of general chemistry teaching labs in the Ekeley Sciences Building, part of a $33.5 million renovation project.

While Ekeley has had some updates over the years, the building was originally constructed in 1898, and the general chemistry spaces needed many improvements related to modernization, eco-conscious updates and safety optimization, said Chris Marelli, director of the general chemistry teaching labs. Funding for the project came from a mix of sources including the President’s Initiative, campus cash reserves and bond debt.

Students participate in a chemistry class in one of the newly renovated lab spaces.

Designed with both functionality and flexibility in mind, these updated lab spaces blend advanced technology with intentional design, Marelli said. Technological upgrades include a video calling system that allows graduate teaching assistants a direct line to lab staff during emergencies, updated engineering controls for improved safety, new HVAC systems for increased air flow and new touch-control fume hoods for improved safety. Additionally, new lighting and new A/V systems with projectors and screens or widescreen TVs replaced chalkboards. These new A/V technologies bring more state-of-the-art teaching into the labs, Marelli said.

The addition of wheelchair-accessible workstations in seven labs creates spaces that are both adaptable and inclusive, while collaborative workstations further support active learning, Marelli said. Three adjacent help rooms were also added, which can be configured as separate spaces or combined into a larger instructional area to accommodate varying instructional needs.

“All of the remodeling was completed with the goal of creating a better learning experience for students,” Marelli said. “These updated facilities will benefit not just our chemistry majors but all arts and sciences students who enroll in an undergraduate chemistry lab.”

To support the goal of making hands-on general chemistry learning accessible to such a wide student population, the number of general chemistry labs was increased from 12 to 14 during the renovation, thanks to creative spatial redesigns, Marelli said. The renovation prioritized efficient usage of the existing building footprint while widening hallways for safer pedestrian traffic patterns during class changeover periods, relocating the three help rooms and integrating better storage solutions into the lab spaces.

“We were at maximum capacity in our labs before; we can now accommodate an additional 400 students, allowing room for us to continue to grow our program moving forward,” Marelli said. The renovated labs will be able to accommodate an additional 1,000 students each year, he added.

Construction on the renovated lab spaces began in December 2025 and was spearheaded by Adolfson & Peterson Construction (A&P). Marelli and two of the general chemistry lab coordinators, Avery Hatch and Estrella Lastre, participated in meetings with A&P to provide insight into how students would use the lab spaces and helped guide project decisions for the renovation.

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The recently completed project increases the number of labs from 12 to 14 and includes a multitude of modernization and safety improvements.

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Matthew Olm named a 2026 Boettcher Investigator

Rachel Sauer — Fri, 29 May 2026 17:10:55 +0000

Matthew Olm named a 2026 Boettcher Investigator Rachel Sauer Fri, 05/29/2026 - 11:10

Grant will support Olm’s research on how diet and lifestyle shape the infant gut microbiome and immune disease risk

Matthew Olm, a �鶹��Ѱ�� assistant professor of integrative physiology, has been named a member of the 2026 class of Boettcher Investigators.

Olm is one of eight early-career biomedical researchers at four leading Colorado academic and research institutions who each will receive a $250,000 grant through the Boettcher Foundation’s Webb-Waring Biomedical Research Awards Program to fund up to three years of independent scientific research.

The Webb-Waring Biomedical Research Awards provide critical early-career support and position recipients to compete for additional private, state and federal research funding while helping Colorado retain top scientific talent, according to the Boettcher Foundation.

Matthew Olm, a �鶹��Ѱ�� assistant professor of integrative physiology, has been named a member of the 2026 class of Boettcher Investigators.

“The awards are critical to Colorado’s future because of the investment in researchers at one of the most important stages of their careers, when bold ideas have the potential to create lasting impact,” said Katie Kramer, president and CEO of the Boettcher Foundation, in an announcement of the awards. “Colorado’s leadership in bioscience depends on ensuring that emerging researchers have the resources to pursue innovative work.”

The Boettcher grant will support Olm’s research on how diet and lifestyle shape the infant gut microbiome and immune disease risk.

“Immune diseases like asthma, allergies and type 1 diabetes have exploded in industrialized countries over the past 100 years, but they are still rare in non-industrialized settings,” Olm says. “The microbes that colonize infant guts in the first year of life appear to be critical for training the human immune system, and we hypothesize that something about modern life is disrupting this process. This funding gives us the ability to compare infant microbiomes across the globe using cutting-edge immunological and bioinformatics techniques. We hope this work will ultimately lead to the development of strategies to restore the infant microbiome to its historical state to prevent immune diseases before they start.”

Olm, who earned his bachelor’s degree at the University of Pittsburgh and his PhD at the University of California Berkeley, leads the Integrative Microbiome Research Laboratory, where he and his research colleagues study the human microbiome as “an entire ecosystem of microscopic organisms that live on our skin and inside our body. These microbes are integrated into our immune, digestive and nervous systems and are critical to our overall wellbeing.”

Olm and his colleagues aim to increase understanding of the human microbiome and its connections to physiology and to apply these findings to improve human health using cutting-edge, computer-based analysis and experimental techniques to study the microbiome.

The lab’s current research topics include:

From where do we get our microbiome? How do our microbes spread from person to person?
How does the infant gut microbiome influence the development of allergies and auto-immune disease?
How does our intestinal immune system control our gut microbiome? How do failures in this control lead to disease?

About the awards program

Since it began, the Webb-Waring Biomedical Research Awards Program has supported 121 Boettcher Investigators, including this year’s class, and awarded almost $29 million in grant funding. These researchers have gone on to secure more than $150 million in additional research funding from federal, state and private sources. The Boettcher Foundation’s Webb-Waring Biomedical Research Awards strengthen the state’s long-term competitiveness by helping emerging investigators accelerate breakthroughs for patients.

“Colorado’s future as a leading hub for health innovation depends on bold scientific thinking and sustained investment in emerging researchers,” said Elyse Blazevich, president and CEO of the Colorado BioScience Association, in an announcement of the awards. “The Boettcher Investigators are advancing high-impact discoveries across some of the most urgent challenges in human health while strengthening Colorado’s position as a center for biomedical research and innovation. These awards help accelerate breakthrough science, support exceptional talent, and reinforce the collaborative research environment that sets Colorado apart.”

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Grant will support Olm’s research on how diet and lifestyle shape the infant gut microbiome and immune disease risk.

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Making a political turn in the fight for animal rights

Rachel Sauer — Thu, 21 May 2026 12:30:47 +0000

Making a political turn in the fight for animal rights Rachel Sauer Thu, 05/21/2026 - 06:30

Tiffany Plate

A new journal article by �鶹��Ѱ��Boulder PhD student Dayton Martindale argues that animal rights isn’t just about an absence of suffering—it’s about giving them agency

As a second grader, Dayton Martindale was pretty sure he knew what his career path would look like: He was going to be the host of a show on Animal Planet. It made sense, given how much he enjoyed being around animals and learning about them.

Around that time Martindale also started to understand that humans are mammals, just like many of the animals he loved. “I think that just stuck with me,” he says. “It affected how I looked at animals and saw them as more like myself.”

�鶹��Ѱ��Boulder PhD student Dayton Martindale grew up with animals and knew from an early age that he wanted to work to protect them in some way. (Photo: Dayton Martindale)

That was the beginning of a lifetime of philosophical and moral explorations of animal rights, culminating in his current PhD work in environmental studies at the �鶹��Ѱ��. And he’s been especially prolific this year: He’s had six articles published since late 2025, all centered around two themes: How do we view animals as agents who desire their freedom, and how do we treat animal welfare as an object of public and political concern?

One article, which was published in March 2026 in the Journal of Agricultural and Environmental Ethics, pushes past the common thought that animal welfare simply means ending the most egregious animal abuses, giving farm animals more space to roam or taking captive animals out of small zoo enclosures—to the point of actually giving animals agency.

“This paper was meant to be a sort of stepping-stone,” says Martindale. “It’s building toward what I want to do for my dissertation, which is to reach conservation practitioners and policymakers and advocates, and to think about how non-human animals’ interests and agency can be listened to in decision-making spaces.”

The argument for agency

Martindale’s article, “Liberty, Equality, Animality: On Freedom and Nonhuman Agency,” was first drafted in his Conceptual Foundations of Environmental Studies class (taught by his advisor Ben Hale).

The argument confronts the question of whether animals care about having free will over their own lives. “In a lot of animal ethics conversations, there's a big focus on reducing animal suffering, without a positive vision of what a good life for animals actually looks like,” says Martindale. “Both in philosophy and in animal behavior and science, there is a lot of evidence that animals have interests in exercising agency and making choices.”

Scholar Dayton Martindale argues that freeing animals from captivity and a life of suffering is just the first step in giving them a good life. (Photo: Pexels)

One of the most common examples of this, Martindale says, is something called “contrafreeloading.” The concept is that many animals prefer to work for food rather than get it freely, and that they like to be actively engaged in their surroundings.

Contrafreeloading has been studied in a wide range of species—from dogs to chickens to human children—showing that they will often ignore a free bowl of food and instead choose to complete a task to get that food, Martindale says. “Scientists interpret this as there being some reward in doing the task itself.”

Martindale cites another study, in which researchers monitored giant pandas’ stress levels when they were confined to an exhibit area or given the choice to move between the exhibit or a private enclosure. “When the pandas had more freedom to move—even if they mostly stayed in the exhibit—just knowing they could move around reduced their stress levels,” Martindale says.

Experiments in other species show that other controls, like being able to change the lights in their enclosure, or to choose the order in which they completed a task, also seemed to make them calmer and happier, he says.

“I think there are limits on what can be accomplished in a zoo, especially for larger species,” says Martindale. “But what’s interesting about the framework in this paper is that it can provide a long-term aspiration—of no enclosures, or no cages at all—but it also can guide shorter term, small actions, whether in a zoo or in my house.”  

One way Martindale puts it into action in his own home is by delivering food to his shelter mutt, Geo, in a puzzle feeder, which requires him to work for his meals. Martindale also often lets Geo choose their route on a walk or takes him to parks and open spaces where he can be off leash.

Dayton Martindale and dog Geo take advantage of all of Boulder’s hiking trails, like this one in Eldorado Canyon State Park, but they especially appreciate areas where Geo has more freedom to roam off leash through the city’s Voice and Sight Program. (Photo: Dayton Martindale)

“What’s interesting is he's way better behaved off leash than on,” says Martindale. “On leash he’s always pulling. But off leash he can go sniff where he wants, but he'll also turn around whenever I call his name in a way that he doesn’t when he’s on a leash.” It’s almost as if Geo is reciprocating the respect Martindale is showing him by giving him his freedom.

A shift in the movement

The themes of the article parallel what Martindale describes as a “political turn” in the animal rights discussion in the last 15 years. Activists are now exploring how to establish institutions and infrastructure that can give animals, including wildlife and domestic pets, more agency.

“Traditionally, a lot of animal ethics was saying, ‘here's why you shouldn't eat meat, and why we shouldn't test on animals, and here's why we shouldn't have zoos,’” Martindale says, adding that 50 years of telling people to be vegan has had somewhat limited success. “The political turn is saying: That's all great, but what are the institutions that societies need to either achieve these goals or represent animals in some way?”

Martindale cites Boulder’s Voice and Sight Program, as well as its off-leash dog parks, as a good example of how we can institutionally support animal agency. Another instance, he says, is the New York City Mayor’s Office of Animal Welfare, which administers programs that encourage co-habitation with wildlife or promote humane solutions for reducing community cat populations.

He hopes that his writing, both academic and non-academic, might reach policymakers who plan urban spaces for dogs, relax leash laws or even install wildlife crossings over busy highways.

Putting action into practice

Currently in the third year of his PhD studies, Dayton recently defended his prospectus, which will cover ethical and political relationships with wild animals.

Prior to his PhD work, Martindale spent years working as a journalist and writer, exploring the intersection of animal rights, politics and the environment. Post doctorate, he’s hoping he can continue writing in the area of policy or advocacy work. “I love all this research, but I want it to feel connected to, informed by and relevant to social change.”

“I think animals are really interesting, intellectually, philosophically and scientifically. But that's not why I'm in this. It’s because trillions of them are tortured and killed every year. And because humans are animals too, and our own well-being on this planet is tied up in sharing it well.”

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A new journal article by �鶹��Ѱ��Boulder PhD student Dayton Martindale argues that animal rights isn’t just about an absence of suffering—it’s about giving them agency.

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Scholars apply economic analysis to ecological research

Rachel Sauer — Wed, 20 May 2026 21:25:35 +0000

Scholars apply economic analysis to ecological research Rachel Sauer Wed, 05/20/2026 - 15:25

Rachel Sauer

In research published today, recent PhD graduate Asia Kaiser details how synthetic control methods estimated significant declines in bee observations when traditional analyses didn’t

Since it launched in 2008 as a UC Berkeley student’s master's project, the iNaturalist platform has been a source of both fascination and frustration for researchers.

The hundreds of millions of observations about the natural world logged by both professional and citizen scientists around the globe are a treasure trove of information about biodiversity. But is that data usable in research? The prevailing sentiment has veered toward doubt, skepticism or an outright “no.”

“I think the feeling has been, ‘Oh, because this data is just being collected opportunistically by nature enthusiasts and not in a standardized, rigorous way, it can’t be used in scientific research,’” says Asia Kaiser, who earlier this month earned her PhD in the �鶹��Ѱ�� Department of Ecology and Evolutionary Biology. “If you haven’t planned out data collection in advance, a lot of researchers hesitate to use it.”

Recent PhD graduate Asia Kaiser studied how synthetic control methods estimated significant declines in bee observations when traditional analyses didn’t.

There had to be a way, Kaiser thought, to tap into the vast cache of information logged into iNaturalist without sacrificing scientific rigor, especially data collected in urban environments. The answer, it turned out, lay in economics.

In research published today, Kaiser and co-authors Julian Resasco and Laura Dee, both associate professors of ecology and evolutionary biology, detail how combining iNaturalist records with synthetic control methods, originally used in economics, estimated a significant decline in bee observations in Philadelphia during the two years following Hurricane Ida in 2021, while conventional ecological analyses didn’t detect the decline.

“Basically, the inspiration for this project was thinking about causal inference in ecology,” Kaiser explains. “When we have observational data, can we actually use that to ask questions about drivers of biodiversity?”

‘You can’t just go into people’s backyards’

These questions dovetailed neatly with Kaiser’s research focus, which is bees—specifically, how human land use affects different insect groups and, consequently, the ecosystem services they provide in coupled human-natural systems. Among her research aims is understanding biodiversity in urban environments, improving the resilience of urban agroecosystems, increasing equitable access to fresh produce and promoting environmental justice in cities.

However, monitoring biodiversity and evaluating drivers of change in urban environments is confounded by several issues: “Cities are mosaics of land-use types, including parks, private properties, buildings, roads and industrial zones,” Kaiser writes in the paper. “As a result, sampling efforts can be complicated by permission and safety issues, and leaving unattended sampling equipment in the field brings a higher risk of theft, tampering and vandalism in cities.

“Given these challenges, measuring biodiversity in cities requires different tools and data streams than those used in natural ecosystems. Participatory science data is a promising solution for monitoring biodiversity in cities; cities are the land use type with some of the highest upload volumes of data to participatory science platforms, largely because upload frequency is strongly influenced by population density.”

Despite the abundance of participatory science data in platforms like iNaturalist, researchers have hesitated to draw from it, relying instead on randomized, controlled and replicable experiments to identify and estimate causal relationships. That kind of science, Kaiser says, becomes more difficult in urban environments due to sampling challenges and historical legacies that shape different neighborhoods, among other reasons.

“If you’re studying a natural area, you could get a permit and go sample all over, but you can’t do that in a city,” Kaiser says. “Even if you get a permit, you can’t just go into people’s backyards.”

The idea of how to bridge the gap between the abundance of iNaturalist data logged in urban areas and the rigor expected in scientific research came to Kaiser when she was assigned to watch a lecture given by a Nobel laureate in economics. The lecture topic was synthetic control methods, which originated in economics as a way to create a nonexistent control group that allows for comparisons between real-world groups before and after an event or intervention.

One of the most famous uses of synthetic control methods in economics was in estimating the impact of Germany’s reunification after the fall of the Berlin Wall on the gross domestic product (GDP) of western Germany. Economists created a “synthetic” Germany from economic data to study GDP with and without reunification.

Though synthetic control methods hadn’t been widely used in ecology research, “I thought it could be adopted with iNaturalist data,” Kaiser explains. She was further interested in studying the effects of Hurricane Ida on her home city of Philadelphia, which included significant flooding.

“If you’re studying a natural area, you could get a permit and go sample all over, but you can’t do that in a city. Even if you get a permit, you can’t just go into people’s backyards,” explains �鶹��Ѱ��Boulder scientist Asia Kaiser about the challenges of ecological research in urban areas. (Photo: Sandy Millar/Unsplash)

“Even though it didn’t have a huge impact on people per se, the effects of the hurricane were really dramatic. Looking at the water levels, the stream gauges had their highest values ever in the 100 years that they’ve been measuring. My feeling was that would have a pretty big impact on bees, because if you look at bee biodiversity, bees are pretty sensitive to precipitation and water. The ones that nest in the ground are really affected by huge flooding events.”

Declines following a hurricane

To apply synthetic control methods to ecological research, Kaiser and her colleagues drew data from the Global Biodiversity Information Facility, which collects research-grade iNaturalist data—that which includes, among other points, latitude and longitude, collection date and time and correct identification—as a proxy for bee abundance in Philadelphia.

They analyzed for bee population declines and, in addition to synthetic control methods, also performed the more traditional methods of interrupted time series regression, before-after control impact regression and before-after regression.

Kaiser and her colleagues found that synthetic control estimated a 15.5%—20.9% decline in bee observations in the two years following Hurricane Ida. In contrast, the three more common ecological analyses didn’t detect this decline.

“That was an amazing moment, seeing this decline in the data and better understanding how iNaturalist data may be able to help us look at the impact of unusual climate events—things that are happening more and more these days, like huge fires, huge floods, abnormally warm winters,” Kaiser says. “Unless you were already collecting data in a region before, you can’t really see the impact before the event, but synthetic control methods might be able to help us in those situations.”

Kaiser adds that this method also might be useful for looking at the effect of policy interventions. For example, the city of Boulder is establishing pollinator corridors, and Kaiser sees potential in using this method to draw from iNaturalist data in studying the outcomes of these corridors.

Scientists who reviewed the paper expressed excitement and skepticism about using synthetic control methods in ecological research, Kaiser says: “They asked questions about whether or not the decline I’m seeing is a true thing that’s happening or an artifact of the way data has been collected. iNaturalist is very sensitive to observers—wealthy neighborhoods have higher uploads, areas around research universities have higher uploads—but this statistical method can help control for those things.”

Thanks to the professional and citizen scientists gathering data and sharing it on iNaturalist, Kaiser says she sees potential to apply synthetic control methods to a range of ecological research. For example, “using the bee biodiversity that’s collected on iNaturalist, does that correlate with how well flowers are being pollinated? I think that’s something we’ll be able to study.”

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In research published today, recent PhD graduate Asia Kaiser details how synthetic control methods estimated significant declines in bee observations when traditional analyses didn’t.

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Top photo: Aaron Burden/Unsplash

Fly agaric has a long association with fairies and humans

Rachel Sauer — Wed, 20 May 2026 19:01:01 +0000

Fly agaric has a long association with fairies and humans Rachel Sauer Wed, 05/20/2026 - 13:01

Jeff Mitton

Since the Renaissance, fly agaric has appeared in art and literature, frequently associated with fairies, trolls, wizards, witches and other mystical creatures

The most iconic and easily identified mushroom in the world is Amanita muscaria, or fly agaric. It grows around the world at northern latitudes in association with spruces, pines, birches and aspens, with its roots forming mutually beneficial mycorrhizal associations to exchange water and nutrients. It is easy to recognize, for it has a bright red cap, and all else white: stipe (stem), gills (underside of cap) and crumbles of the egg sac on the cap. These bright, contrasting colors make it easy to find and identify in a forest.

Fly agaric's bright, contrasting colors evolved to advertise their molecular defenses, muscimol and ibotenic acid. Unless an herbivore has evolved a way to combat activities of these compounds, these defenses are toxic and hallucinogenic, triggering severe and prolonged vomiting and loss of coordination and balance.

These colorful mushrooms and their psychoactive compounds have been associated with mankind for about 10,000 years. The association started with shamans in northern Europe and Siberia, who used the mushrooms during religious ceremonies to imagine communication with gods, ancestors and spirits. Similarly, they could be an ecstatic inebriant to enliven celebrations of winter solstice and the return of sunlight.

From the 13th through the 19th centuries, fly agaric was commonly used to kill flies in European homes and buildings. Flies were abundant before the invention of screens on windows and doors, and they were dreaded, thanks to a rumor that they get into the head and cause insanity. The practice came about after it was discovered that dried crumbs of fly agaric dropped into milk attracted flies, and when the flies sipped the milk, the ibotenic acid paralyzed and ultimately killed them. The common name fly agaric stems from this practice—agaric is the name for the familiar toadstool-shaped mushroom. Its formal name is Amanita muscaria: Amanita is the genus of mushrooms, and muscaria is a reference to the common housefly, Musca domestica.

Since the Renaissance, fly agaric has appeared in art and literature, frequently associated with fairies, trolls, wizards, witches and other mystical creatures in fairy tales and books for children. Recent examples will be most familiar. Dancing red-and-white mushrooms appear in Fantasia. In Alice's Adventures in Wonderland, Alice converses with a hookah-smoking caterpillar sitting on a gigantic red-and-white mushroom. Fly agaric also appears in Snow White and the Seven Dwarf. Smurfs are small, blue, humanoid creatures living in red-and-white, hollowed-out mushrooms.

Laplanders, who use reindeer as work animals, saw their reindeer eat fly agaric and subsequently romp and stagger. Laplander herdsmen believed that reindeer sought fly agaric for its psychoactive reward. The Laplanders also used fly agaric to achieve an ecstatic and imaginative state, and it is possible that they were at the root of the Christmas story of flying reindeer led by a jolly man dressed in the colors of the mushroom who enters a dwelling via its chimney. Perhaps this entry recalled shamans who would enter a dwelling through the smoke hole in the roof, delivering sacks of colorful mushrooms to fuel a celebration. The Christmas Story appeared in 1823 in a poem referred to as "A Visit from St. Nicholas” by Clement Clarke Moore.

A red cap dotted with the dried crumbles of the egg sac make fly agaric easy to find and identify. (Photo: Jeff Mitton)

More than 600 described species in the genus Amanita occupy the full range from deadly (death cap, A. phalloides; destroying angel, A. bisporigera) to delicious (blusher, A. rubescens; Caesar's mushroom, A. caesarea). With so many species and such dire consequences for a mistaken identification, you should be trained before collecting fly agarics from the forest for personal use.

While hiking at the University of Colorado's Mountain Research Station, I came across a cluster of fly agaric mushrooms. I was surprised to find several divots in the cap—something small, the size of a bird or chipmunk, had taken bites. Who was eating fly agaric?

Reindeer have four chambered stomachs with microbial fermentation, which allows them to digest the cellulose in plant cell walls. All ruminants—including cattle, sheep, goats and bison, eat fly agaric without discomfort.

Another group of animals that can enjoy fly agaric with impunity is squirrels (family Sciuridae), and every squirrel species that I checked (pine, grey, fox, golden mantled ground squirrel, rocks squirrels, chipmunks) eat fly agaric and use a unique method to safely pass the toxin. Squirrels have a novel glycoprotein lining in their intestines that immediately binds the toxins, inactivating them, and escorting them the rest of the way through the digestive tract.

Photographers have amply documented foxes gulping down hunks of fly agaric, but they suffer the agony of severe, prolonged vomiting and staggering that omnivores generally experience. Foxes may be sly, but not when it comes to choosing ingredients for a salad.

Meanwhile, turkeys, grouse, crows, ravens and jays eat fly agaric without distress, but many birds suffer both gastrointestinal distress and severe neurological symptoms.

It is thought provoking to discover an area here in Colorado where the bright mushrooms are popping up, for the association of humans and fly agaric has multiple facets and reaches far back into time. Aposematic coloration reliably warns of the defensive substances (muscimol and ibotenic acid), foreshadowing gastrointestinal misery and eruption for some species. Like all other molecular defenses, one or more species have evolved a way around the defenses and evolved to use them either as food or as an intoxicant.

Ten thousand years ago shamans used the same molecules to produce altered states in their followers for ceremonies and celebrations. Artists and writers brought back inspiration from altered states, and today we have enchanting fairy tales and numerous imaginary creatures to entertain and stimulate imaginations. Each year, families drape festive lights and children listen for the sound of hooves on the roof and a cheerful voice encouraging his reindeer.

For scientists, the chemistries of muscimol and ibotenic acid provide insight into chemical ecology of natural populations and enhance the pleasures of a walk in the woods.

Jeff Mitton is a professor emeritus in the Department of Ecology and Evolutionary Biology at the �鶹��Ѱ��. His column, "Natural Selections," is also printed in the Boulder Daily Camera.

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Since the Renaissance, fly agaric has appeared in art and literature, frequently associated with fairies, trolls, wizards, witches and other mystical creatures.

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Top photo: A cluster of fly agaric mushrooms show variation of size, shape and color (Photo: Jeff Mitton)

Scholar exercised science muscles in the gym

Rachel Sauer — Mon, 11 May 2026 16:36:25 +0000

Scholar exercised science muscles in the gym Rachel Sauer Mon, 05/11/2026 - 10:36

Cody DeBos

In new memoir, senior aging researcher Doug Seals chronicles the work of science when conditions aren’t ideal

Imagine a biomedical research laboratory. Chances are, visions of gleaming equipment, climate-controlled rooms, and the hum of precision instruments come to mind.

But what if that lab was really a century-old gymnasium plagued by electrical outages, noise and temperatures that swing with the seasons? Those are just some of the challenges Doug Seals faced while establishing one of the most productive aging research programs in the country.

Seals, a distinguished professor in the �鶹��Ѱ�� Department of Integrative Physiology, recently published a memoir chronicling more than four decades in biomedical research. In his own words, the book isn’t all about the science; it’s also about what it takes to succeed when conditions aren’t in your favor.

Doug Seals, a distinguished professor in the �鶹��Ѱ��Boulder Department of Integrative Physiology, recently published a memoir chronicling more than four decades in biomedical research.

An unlikely scientist

Seals grew up in an under-educated family, his parents having only elementary school educations, and was the first in his extended family to attend college. As an undergraduate, he majored in education and business administration hoping to coach football.

A research career wasn’t on his radar.

“However, the program had a mandatory requirement to perform a research thesis, and I discovered that I really liked the research process,” Seals says.

That discovery set him on the path to where he is today.

Seals went on to earn his PhD at the University of Wisconsin-Madison, then completed his postdoctoral training at Washington University School of Medicine in St. Louis and at the University of Iowa before landing his first faculty position. He would eventually join �鶹��Ѱ��Boulder’s Department of Integrative Physiology (the Department of Kinesiology at the time) in 1992.

“Each stop along the journey provides a learning opportunity, and you take the new tool and add it to your toolbox,” he reflects.

Seals’ new memoir details the unique trajectory of his career and how little of it was the byproduct of elite circumstances.

“I had no conventional mentoring in graduate school (I did not belong to a ‘laboratory’), so I learned how to work on my own, independently,” he says, “which turned out to be helpful later.”

Bringing science to the gym

The title of Seals’ memoir, A Life of Science—In Gyms, isn’t a metaphor. For 30 years, Seals and a small group of colleagues ran NIH -funded research programs out of Carlson Gymnasium on the �鶹��Ѱ��Boulder campus before moving out in 2020. The building, constructed in the 1920s, was never designed with biomedical research in mind.

Yet Seals and the other faculty found a way to make it work.

His idea for the book grew out of a period of reflection during the pandemic.

“As I was writing a series of personal commentaries during and post-pandemic, I began to think about penning a memoir of my unusual life of science in gyms,” he says.

He started by authoring a historical scientific article about the Carlson years, then realized the story was bigger than could be told in a journal piece.

“I decided to expand that story to include my earlier life and more details about the challenges I have overcome, which necessitated the longer narrative format of a memoir.”

The stories he chose to include during the writing process are, by his own account, the ones readers may find most compelling, particularly how Seals and his colleagues built a top academic research department at �鶹��Ѱ��Boulder.

“For example, I share how I obtained the funds to start the first research seminar series in the department . . . the challenges we faced performing NIH-funded research in an old gym designed for sport and how I eventually took matters into my own hands to upgrade our research facilities when the campus did not do so,” he says.

In his memoir, Doug Seals details the "challenges we faced performing NIH-funded research in an old gym designed for sport."

Despite the conditions, his lab secured continuous NIH funding, produced more than 350 peer-reviewed publications and trained more than 300 scientists across career stages from undergraduate to junior faculty.

Living long and living well

Woven through the memoir’s recap of institutional challenges is the science Seals has dedicated his career to. His lab’s central focus is the concept of extending “healthspan”—not just how long we live, but how long we live well.

“In biomedical aging research, ‘healthspan’ generally refers to the period of life that you retain good physical and cognitive function and are free of serious disease, whereas ‘lifespan’ is the entire period of life,” Seals explains.

He notes the two don’t always align. A long life shadowed by disability or chronic disease is a far different proposition than one that stays healthy into its final decades.

Seals has spent 40 years researching what tips the scale in favor of the latter.

Seals has clear advice for those seeking to improve their healthspan: “If I could recommend that people do only one thing, it would be to exercise regularly—to be physically active. No other strategy comes close to exerting the health benefits of regular exercise on physical and cognitive function and prevention of chronic diseases,” he says.

Diet, not smoking, and other factors matter.

“But the effects of regular exercise cannot be fully mimicked by any other lifestyle behavior or pill,” Seals adds.

In control of your fate

One of the more challenging aspects of writing the memoir, Seals admits, was choosing what to talk about.

“The most difficult challenge was trying to make the book compelling to both scientists and non-scientists. I wanted to provide a lot of ‘insider insight’ for the layperson, while not boring academics reading the story,” he says.

Through his careful curation of stories, the message he hopes to land is straightforward.

“The main message of the memoir is that you don’t need to come from the most educated family background, attend the most elite institutes of higher education, join the faculty of a top-ranked department or have the best research facilities to achieve and sustain success in your profession,” he says.

“You are the ‘master of your fate,’ not your environment. Your determination, creativity and resilience are much more important to the outcome than external factors,” Seals adds.

Seals lived this lesson before ever writing it down. Sitting atop the resume of a 41-year career built, improbably, in a gymnasium, he fears the perspective that has carried him through it all is going out of fashion.

“I worry that more recent generations may not fully understand this simple point of view,” he says.

The memoir is his attempt to make sure they do.

For anyone who has ever felt that the odds are stacked against them, Seals offers one last reminder: “Your personal agency is much more important in achieving your life goals than your immediate environment.”

A preview of A Life of Science—In Gyms! can be accessed at Physiology.org.

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In new memoir, �鶹��Ѱ��Boulder senior aging researcher Doug Seals chronicles the work of science when conditions aren’t ideal.

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Top image: Carlson Gymnasium

Come for the beer, stay for the science

Rachel Sauer — Fri, 08 May 2026 00:07:52 +0000

Come for the beer, stay for the science Rachel Sauer Thu, 05/07/2026 - 18:07

Rachel Sauer

The May 11 Earth on Tap event at Rayback Collective in Boulder, open to all, invites scientists and non-scientists to gather for discussions of climate research

It started, as good things often do, with CAKE. In this case, that’s the Climate Action Knowledge Exchange, a group formed by �鶹��Ѱ�� atmospheric and oceanic sciences (ATOC) graduate students Max Elling, Dora Shlosberg and Josh Gooch. They noticed, the further they progressed in their studies, that there are “a lot of different people working in climate, but not necessarily working together,” explains Shlosberg, a PhD student.

If you go

What: Earth on Tap

When: 5:45-7:30 p.m. Monday, May 11

Where: Rayback Collective, 2775 Valmont Road in Boulder

Who: All are invited

Learn more

So, they formed an interdisciplinary outreach group, CAKE, to break down silos and build partnerships between scholars, industry professionals and community members. From there, CAKE began collaborating with ATOC’s existing Outreach Committee, a group dedicated to educating the public on Earth science through engaging and interactive learning. Outreach teaches children through their SEEDS program, bringing live demonstrations on Earth-system science to local elementary schools.

Then, last semester, they began discussing what more they could be doing to involve adults in science, particularly those who aren’t professional scientists but are science curious.

Earth on Tap organizers express that there has been a lot of misinformation spread about science, and there is sometimes an element of mystery among the public as to what it is local scientists do. Earth on Tap aims to break down these barriers and connect people of all backgrounds to the science being done in their own backyard.

The key is to make it fun, says ATOC PhD student Maggie Scholer. But how?

The answer: Beer.

Not to make the science go down easier, but as a tool to bring science out of the lab and field research sites and into spaces where all are welcome, where community grows, where learning can happen with a chocolate stout and a shared plate of sliders. So, that’s how Earth on Tap came to be.

An event at which all ages are welcome—though you’ll have to show ID if you want that beer—Earth on Tap features climate scientists discussing their research with a focus on how it applies to and affects the broader community.

The second Earth on Tap will be from 5:45-7:30 p.m. Monday, May 11, at the Rayback Collective in Boulder. Kyle Manley, an interdisciplinary climate scientist, and Molly Wieringa, a postdoctoral fellow with the National Center for Atmospheric research, will discuss fires and public land recreation as well as sea ice and polar climate engineering.

Telling science stories

Monday’s Earth on Tap topic is especially timely, Josh Gooch says, because he and his ATOC colleagues frequently discuss how “to communicate how abnormal this winter has been and contextualize it to the future. Each week we have a weather discussion that one of our professors leads, and we get these branching discussions of, ‘If we make up the precipitation deficit in the future, what does that mean in terms of more fuel for wildfires?’ So, one of our goals (with Earth on Tap) is to set the context of what current weather events that are occurring on the Front Range may lead to in future seasons. That’s a concern that a lot of people share.”

Max Elling, an ATOC PhD student and researcher in the Oceans and Climate Lab, notes that the Boulder area is interesting because of its large population of scientists as well as its population of non-scientists, who are nevertheless involved in Earth science, yet there still can be a disconnect between the research that’s happening in this area and what community members know about it.

“With Earth on Tap, we’re learning more about what people are curious about,” Elling says, adding that he and his colleagues are learning to better understand their audiences and tailor their outreach style accordingly.

“We have an inherent language that we use as scientists, certain acronyms, and we’re taught to present at conferences where everyone is aware of this language,” Gooch says. “We need to be more aware of situations where an audience member might not be as familiar because they don’t interface with these things every day.”

Jonah Shaw, a post-doctoral associate at the Cooperative Institute for Research in Environmental Sciences (CIRES) who spoke at the inaugural Earth on Tap in January, adds that all of his communication training in graduate school was in a conference environment, which doesn’t necessarily translate to climate discussions over beers at the Rayback.

“Something that I think is really important when you’re communicating within a scientific field is a story, but it becomes even more important when you’re communicating with the general public,” Shaw says. “It’s meeting people where they are, so for me, instead of talking about what I do on a day-to-day basis, I talked about a satellite mission I worked on, the story of that mission. I was talking about the narrative aspects and connecting with people’s experiences, and I was incredibly excited to see how well attended it was by non-scientists. Everyone is in their own realm and able to connect (with the science) in their own way.”

Scholer says that Earth on Tap organizers learn from event to event how to better involve audience members in the presentation, including trivia questions with prizes and QR codes that people can scan to submit questions if they’re not inclined to raise their hand. Ideally, she adds, people will come to Earth on Tap and have a great time and be more inclined to take climate action when opportunities arise.

“I think, especially in atmospheric science, ideally the outcome of what we do in the field is actionable for policy makers,” says ATOC PhD student Lucas Howard. “I think having the public more informed about not just the science in terms of outcomes, in terms of uncertainty, but the process of what goes into generating the science, can only have good downstream effects.”

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The May 11 Earth on Tap event at Rayback Collective in Boulder, open to all, invites scientists and non-scientists to gather for discussions of climate research.

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Hot ponds can help amphibians fight infection—or make things worse

Rachel Sauer — Thu, 07 May 2026 16:35:45 +0000

Hot ponds can help amphibians fight infection—or make things worse Rachel Sauer Thu, 05/07/2026 - 10:35

Blake Puscher

New research from �鶹��Ѱ��Boulder finds that temperature differences between ponds can influence the severity of chytridiomycosis, a deadly fungal disease linked to global amphibian declines

Amphibian populations, including frogs, toads, salamanders and newts, have been declining globally since the 1980s. Many species have even gone extinct.

There are several potential causes for this decline, but one contributor is disease. For example, infection by parasitic flatworms can cause frogs to grow extra limbs, making it harder for them to evade predators. Another prominent amphibian disease called chytridiomycosis has been specifically linked to amphibian declines. It is caused by the fungus Batrachochytrium dendrobatidis, or Bd.

In a study comparing the temperatures of ponds to their level of infection over time, researchers Brendan Hobart and Valerie McKenzie, a �鶹��Ѱ�� professor of ecology and evolutionary biology, discovered that Bd thrives on hosts within a specific range of temperatures and level of temperature variability, above or below which infections are not as severe. This relationship was found to be driven primarily by differences between ponds rather than seasonal differences.

Valerie McKenzie, a �鶹��Ѱ�� professor of ecology and evolutionary biology, worked with PhD graduate Brendan Hobart and other research colleagues to study how temperature affects amphibians' susceptibility to fungal infections.

Hobart worked on the study as a PhD student at �鶹��Ѱ��Boulder and has since completed his PhD and moved on to a research scientist position at the University of Wisconsin. Another �鶹��Ѱ��PhD student, Timothy Korpita, was also involved, along with several people from the National Wildlife Health Center. McKenzie is the principal investigator of the McKenzie Lab.

What makes Bd unique?

Fungi grow on substrates, which are surfaces that provide them with the nutrients they need to develop their reproductive structures and release spores. Some of these spores will end up in new substrates, beginning the next generation. Instead of growing on decaying biological material or living plants like many other species of fungi, Bd’s substrate is the skin of a living animal, specifically an amphibian. Additionally, rather than releasing spores that float through the air, Bd propagates using zoospores, which can swim short distances through the water using their whip-like tails.

“They are microscopic,” McKenzie says, “and they will attach themselves to a skin cell, then penetrate and go inside. They use amphibian skin cells as a place to replicate themselves, rupture that skin cell and let out more zoospores that can go on to infect nearby skin cells or go in the water and infect other individuals.”

Bd’s ability to spread from one pond to another is still something of a mystery, however.

“We still do not understand all the mechanisms by which it is getting spread,” McKenzie says. “People have made guesses that it could be birds that land in the pond water picking up some of these zoospores in their feathers and then fly off and land in another pond.” Even their ability to infect different hosts is surprising, considering that the zoospores can swim only one or two centimeters, but they are able to chemically target molecules found on amphibian skin to make the most of this short range.

Regardless of how the fungus gets around, its strategy is clearly effective, as it has infected a large number of diverse amphibians. According to McKenzie, there are something like 8,000 species of amphibians, which is only slightly fewer than the number of mammalian species.

“This one fungal pathogen is causing declines, or is predicted to cause declines, in maybe a third of amphibians. Imagine if COVID, for example, was causing massive die-offs of not only humans, but all kinds of mammals, like squirrels, whales, wolves, cats, dogs. That is sort of what is happening to amphibians with this fungus. It is unprecedented for what one pathogen can do.”

Bd is dangerous for amphibians because it targets their skin, which they rely on for many purposes, like balancing hydration. According to McKenzie, disruption to the skin can result in secondary organ failure. The disease can be more or less severe for different species, but there are many species that have been seriously affected worldwide. Bd is currently most prominent in the Americas—particularly the Central and South American tropics—eastern Australia and east Africa, but may spread to other parts of the world over time.

How temperature influences infections

Previous research into Bd has singled out thermal conditions, meaning the temperature of the habitats that hosts live in, as key drivers of host outcomes. Particularly, the variability of temperatures and the mean (average) temperature are important variables. “Temperature is the ultimate determinant of most or all biological processes,” Hobart says.

“It is especially relevant to ectotherms”—cold-blooded animals do not produce their own heat—"and their pathogens because their body temperature largely fluctuates with the environment,” Hobart says.

Salamander populations, along with other amphibian populations, have been in decline since the 1980s. Among the causes for these declines is the fungus Batrachochytrium dendrobatidis, or Bd. (Photo: Iuliu Illes/Unsplash)

This study is directed toward exploring the relationship between temperature and infections further, particularly by separating changes in temperature into seasonal and among-site components. To do this, the researchers measured temperatures and Bd infections of eastern newt populations across 20 ponds in Wisconsin over the course of two years.

“All of these ponds were within a few miles,” Hobart says. “From a broad scale perspective, they all have the same climate. If you were to look up a weather forecast on an app, it would be the same for all the ponds, but the actual conditions are very different depending on things like how much tree cover there is over the pond, how clear the water is, how much stuff is floating on the surface, all these different biotic and abiotic factors.”

These differences lead to significant variation in pond-to-pond water temperature, and they are what the study covered rather than gradients in temperature within a given pond.

When the researchers looked at the temperature variability and average temperature, they found that both changed at the same time, or in other words, covaried. According to Hobart, this is because the ponds with the most variable temperature also tended to be the warmest. For this reason, the two variables were combined into a thermal mean and variability index (MVI), which ranged from cool and stable to hot and variable temperatures. When combined with infection data obtained by capturing, swabbing and releasing newts, this index was shown to have a non-linear relationship with infection load (meaning not only whether the fungal disease was present but also how much was on the animals’ skin).

Considering thermal variation both over time and between ponds, infection load was highest at middling MVI values, declining similarly when the index either increased or decreased from there.

“It is this primary hump-shaped relationship,” Hobart says. When the variations over time and space were separated out, the spatial variation resembled the overall relationship very closely, while the temporal variation looked different. “That is what produced this finding that variation from site to site was driving the overall pattern.”

“This one fungal pathogen is causing declines, or is predicted to cause declines, in maybe a third of amphibians ... It is unprecedented for what one pathogen can do.”

Implications for conservation

Considering how severe the effect of Bd has been on amphibian populations, anything people can do to reduce infections is of interest. The results from this study suggest that changing the temperature of a pond could be an effective way of doing this, but it is not as simple as it sounds.

Like many fungi, Bd does best within a limited range of temperatures, which is about 23–28 degrees Celsius or 73–82 Fahrenheit, according to the researchers. At middling MVI values, the temperature is right for Bd, and there is even some evidence that Bd handles temperature variability better than its hosts, giving it an additional advantage.

However, once the temperature increases out of Bd’s ideal range, the benefits of variability cannot counteract the unfavorable heat, especially because amphibian immune responses often increase in strength at these temperatures. On the other hand, when the temperature is low, Bd does not get any advantage from variability and is also outside of its ideal temperature range.

This means that, depending on the starting conditions, the severity of Bd infections in a pond might be diminished by either increasing or decreasing the temperature, but in some cases, changing the temperature would only make things worse.

“It has been suggested,” Hobart says, “that one could cut down trees around a pond to let more light in and make that pond hot. In principle, that seems like a fine idea.” However, “if you did not know where you were on that index, and you cut down a bunch of trees, you could inadvertently increase infection.”

In other words, if a pond’s temperature is middling, increasing it could help with infections, but if the pond is cooler to begin with, it could bring the thermal MVI into the range where Bd thrives.

“There have been a lot of studies looking at the relationship between temperature and this amphibian pathogen,” McKenzie says. For example, there was recently a study that involved building masonry brick “saunas” that frogs can crawl into to heat up and kill off the Bd. “I think what this study shows is that what works for one site may not be applicable for another site, even if that site is relatively close and similar.”

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Politicians talk climate change on X

Rachel Sauer — Tue, 05 May 2026 16:54:02 +0000

Politicians talk climate change on X Rachel Sauer Tue, 05/05/2026 - 10:54

Bradley Worrell

Study by �鶹��Ѱ��Boulder scholar Meaghan Daly looks at how members of Congress framed their arguments for or against taking action on climate change on the popular social media site

For members of Congress, the social media platform X (formerly Twitter) has become one of the most direct ways to communicate with constituents about their thoughts on climate change, allowing them to choose how to address the issue in an unfiltered way.

“X allows politicians to communicate directly and informally with the public, and posts occur much more frequently than polished press releases, so it provides a unique window into how politicians frame climate change in direct engagement with constituents in real time,” explains Meaghan Daly, a climate communications scholar in the �鶹��Ѱ�� Department of Environmental Studies whose research focus includes climate communication and media studies.

In a new study, Daly and her co-authors analyze posts on X by members of Congress, finding that while few U.S. lawmakers now reject the science of climate change outright, conservative members tend to frame the issue in ways that discourage or delay meaningful action. Rather than denying the problem, their messages emphasize economic costs, question the feasibility or redirect responsibilities to other countries, Daly says.

Meaghan Daly is a climate communications scholar in the �鶹��Ѱ�� Department of Environmental Studies whose research focus includes climate communication and media studies.

Drawing from more than 13,000 climate-related messages in 2021 from members of Congress on X, the study co-authors found a spectrum of political climate communication that ranges from active obstruction to concrete advocacy, with a large “murky middle.”

“This research challenges the idea that climate communication is just pro-climate or anti-climate,” Daly says. “It’s more complex than that, and those nuances matter when we’re trying to understand why action does or doesn’t happen.”

In a recent interview with Colorado Arts and Sciences Magazine, Daly talks about why X offers a uniquely powerful lens for studying political climate communication and how these messaging strategies differ by party. Her remarks have been lightly edited for style and grammar and condensed for space.

Question:How did this paper come together?

Daly: I’m a member of the Media and Climate Change Observatory, headed by Max Boykoff in the Department of Environmental Studies. We’ve been doing global monitoring of media coverage of climate change for about 15 years now across newsprint, radio and television.

One of my co-authors, Lucy McAllister (assistant professor at Denison University and a research associate with the Department of Environmental Studies at �鶹��Ѱ��Boulder), is also part of that group. We’ve worked on several projects over the years, including media coverage in legacy news outlets across five countries over time. Our other co-author, Siddharth Vedula (associate professor at Miami University), has also been a long-time collaborator. All three of us received our doctorates from �鶹��Ѱ��Boulder, and the team brought together a strong mix of qualitative and quantitative research backgrounds.

For this paper, we noted in our 2021 study on newspaper coverage that, while climate denial used to be common, more recently fewer people deny climate change outright. Instead, there’s been a shift toward questioning the feasibility of taking action.

About six years ago, a group of scholars published a paper about what they called ‘discourses of delay.’ That paper was preliminary, and in our 2021 study we noted the need to follow up and examine these discourses in greater detail—particularly how they interface with the public in the political sphere. There hadn’t been a comprehensive study of how U.S. politicians communicate about climate change on social media, so we wanted to see how these discourses of delay manifest in political communication.

But we then expanded that framework because we didn't want to just look at how is climate action being delayed, but also how is climate action being advanced, by U.S. politicians. We wanted to have this entire spectrum, looking from delay to action and everything in between, and how politicians are approaching this issue and communicating with the public about it.

Question:Why did you choose to focus on the January to December 2021 timeframe for members of Congress posting on X about climate change?

Daly: We chose 2021 because a lot was happening. The Biden Administration had recently rejoined the Paris Climate Agreement, and multiple major pieces of legislation—what became the Infrastructure Investment and Jobs Act and the Inflation Reduction Act, as well as Build Back Better—were being actively discussed. That gave us a rich dataset and a good microcosm for understanding how climate conversations were being framed and the range of communication strategies being used.

Question:You collected more than 13,000 posts from politicians on X that were related to climate change but then focused on a much smaller subset. How confident are you that the smaller sample represents the broader dataset?

Daly: We started with about 600,000 posts and used an initial screening with established search terms from prior research to ensure they were actually about climate change, which produced a sample of about 13,000 posts. From there, we applied a randomized sampling method stratified by month, since discussion topics ebb and flow over time.

We also conducted six rounds of pilot testing to refine the codebook. Throughout, we ran randomized spot checks and maintained over 80% inter-coder agreement. The final randomized sample had 1,075 posts. Across the pilot and final analysis, we coded a total of 2,844 posts, or 21% of the total sample, which for a qualitative study is quite comprehensive and gives a detailed understanding of communication strategies.

Question:It sounds like the discussion about climate change has moved beyond whether the science is accurate to whether it is feasible to take action to address the issue?

Daly: Yes, absolutely. We saw very few posts questioning the existence of climate change or the science itself. Instead, many posts emphasized downsides—potential economic damage, harm to the fossil fuel industry or job losses. Others redirected responsibility, asking why the U.S. should act if other countries aren’t doing so. Why should we have to be the ones who are taking the lead or paying to implement some of these policies when the rest of the world isn't doing the same?

We also saw a lot of posts pushing non-transformative solutions—unproven technologies, ‘clean coal’ or these fossil fuel–based approaches that are ostensibly less polluting but, in practice, typically aren’t.

Also, we saw postings that we should only rely on things like incentives rather than government regulation or policy mandates that we act on climate change. Basically, arguing we should only have voluntary approaches to addressing climate change, rather than requiring action. So, solutions that aren’t at the scale needed to address climate change.

Question: If a conservative politician talks about job losses or other potential downsides of addressing climate change on X, how do you differentiate between them raising valid questions versus engaging in what could be considered delaying tactics?

Daly: We do know that there are always trade-offs in climate policy. We’re not trying to say that we don’t need to acknowledge those trade-offs.

For example, in making the argument that, as we shift away from fossil fuels and toward more renewable energy technologies, we need to make sure that those people who were working in those industries and relied on it for their livelihoods are not left behind. That’s something that I think is very important to acknowledge and that can get lost in this conversation.

We need to make sure that this is a fair transition, and that those people are connected with jobs and new opportunities in these emerging sectors that are going to create new types of jobs. That comes along with other policy components like retraining, and that’s not treated as a bad thing in our codebook.

"This study is a starting point for understanding how politicians communicate about climate change and how they might improve that communication to advance action," says Meaghan Daly. "One key takeaway is connecting climate discussion to specific actions so people don’t feel the problem is overwhelming and unsolvable." (Photo: iStock)

The way we addressed this is: If people are talking about these downsides, but they are not acknowledging the gravity of climate change at the same time—because it is this massive problem that is going to affect us all in really deep ways that are integral to how we live—that’s when we felt it qualified as delaying rather than simply acknowledging there are trade-offs in all climate policies.

Question:For those members of Congress who have been proponents of taking action on climate change, what kinds of messages did they post?

Daly: Posts promoting climate action emphasized benefits and co-benefits—health, ecosystems and quality of life. Many argued that because the U.S. has historically contributed the most to the problem, it should lead globally, especially as the country rejoined the Paris Climate Accord. There were also many posts highlighting legislation being passed or developed, budget allocations and building systems and structures for action. We describe this as ‘grounded optimism’—linking climate discussion to concrete legislative or on-the-ground action, rather than vague future hope.

Question:Do you know whether some arguments were more effective than others, either on the pro-action or delay-action side?

Daly: I think that’s a great question. This study didn’t address effectiveness in terms of public response, but I think that’s an important next step for future research.

Question:Did you find differences among members of Congress by age, race or ethnicity when it came to posting on X about climate change?

Daly: Yes. Politicians of color were more likely to post about climate change, likely because they represent constituencies on the front lines of climate impacts. Older politicians were also more likely to post about climate action, possibly because their longer tenure gives them more leeway to address controversial issues.

Question:You say in the paper that climate obstructionism can be intentional or unintentional. What do you mean by that?

Daly: One key contribution of the study is identifying what we call the ‘murky middle.’ Some communication strategies can support action or delay depending on context. For example, ‘all talk, little action’ was previously categorized as a delay (tactic), but talking about climate change does raise issue salience. However, simply talking isn’t enough—if it’s not paired with concrete strategies, people may feel overwhelmed and disengage. Posts in this category acknowledged climate change but weren’t attached to pathways for action, which can inadvertently contribute to delay.

Question:Are you planning follow-up work on this topic?

Daly: Yes. Our next step is to apply this typology over a longer timeframe. We’re exploring mixed-methods approaches, including using large language models to apply our codebook at scale, because manual coding is extremely time-intensive.

This study is a starting point for understanding how politicians communicate about climate change and how they might improve that communication to advance action. One key takeaway is connecting climate discussion to specific actions so people don’t feel the problem is overwhelming and unsolvable.

The research also challenges the idea that climate communication is simply pro- or anti-climate. It’s more of a spectrum, which opens up important avenues for future research.

Did you enjoy this article? Subscribe to our newsletter. Passionate about environmental studies? Show your support.

Study by �鶹��Ѱ��Boulder scholar Meaghan Daly looks at how members of Congress framed their arguments for or against taking action on climate change on the popular social media site.

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