Division of Natural Sciences

How was it for you? Women are finally being asked

Rachel Sauer — Thu, 24 Apr 2025 20:10:57 +0000

How was it for you? Women are finally being asked Rachel Sauer Thu, 04/24/2025 - 14:10

Pam Moore

��Ҵ�ý�ƽ�� scientist Chelsea Kilimnik is one of a handful of researchers looking at the correlation between sexual trauma and ‘duty sex’

Driven by a long-held interest in the ways in which unwanted and nonconsensual sexual experiences can shape individuals’ future sexual experiences and overall well-being, Chelsea Kilimnik, a licensed clinical psychologist and assistant professor in the University of Colorado Boulder Department Psychology and Neuroscience and the Renée Crown Wellness Institute, teamed up with researchers at the University of Texas at Austin to study that very topic.

It’s not surprising that research has largely neglected how women’s trauma shapes their sex lives, considering that, as a culture, “we’ve only recently acknowledged that women are sexual beings,” says Kilimnik, who is the director of the Growth, Identity, and Sexual Trauma (GIST) Lab at ��Ҵ�ý�ƽ��.

��Ҵ�ý�ƽ�� researcher Chelsea Kilimnik, an assistant professor of psychology and neuroscience, notes that that, as a culture, "we’ve only recently acknowledged that women are sexual beings."

Kilimnik’s and her colleagues’ research, published recently in The Journal of Sexual Medicine, provides foundational insights into women’s motivations for sex—an area of study that has long been overlooked by the scientific community.

An overlooked area of research

Although the tides are beginning to turn, for many healthcare providers, the idea of prioritizing women’s sexual pleasure is still novel. Many times, when women come to the doctor reporting pelvic pain or pain during sex, their experiences are invalidated and their healthcare needs ignored, says Kilimnik. Not only is this frustrating, but the lack of belief, offered agency and validation can exacerbate mental health difficulties for those with past experiences of sexual trauma.

Meanwhile, the body of data on women’s mental health and its connection to sexual health and well-being is “still in its infancy,” says Kilimnik, who is part of a small community of researchers studying it.

“Sexual trauma affects women at disproportionately higher rates than men and has a significant influence on their sex lives, yet this connection to sexuality is something that was ignored by the literature for centuries, so we need to document it in the literature,” she explains.

While we may think of sex as something that doesn’t affect our lives beyond the bedroom, our sexuality affects many aspects of our day-to-day lives, says Kilimnik. That’s because psychological and sexual well-being are deeply linked.

Psychological well-being encompasses multiple factors, including the presence or absence of mental health disorders, general mood and overall quality of life, says Kilimnik. Sexual well-being, on the other hand, can include your sexual satisfaction, how you feel about yourself as a sexual person, the way your body operates in sexual encounters, body image and the presence or absence of sexual disorders, she says.

“While psychological and sexual well-being are two distinct constructs, they are almost always related,” says Kilimnik. For example, if you’re depressed, that will impact your sex life. And if your sex life is unsatisfying or you struggle to view yourself as a sexual being, that can impact your self-esteem, and in turn, your mental health, she explains.

What the data say

The team of researchers explored the relationships between the frequency of duty sex (the act of engaging in sex out of a sense of obligation or duty), sexual functioning and nonconsensual sexual encounters (NSEs).

"Sexual trauma affects women at disproportionately higher rates than men and has a significant influence on their sex lives, yet this connection to sexuality is something that was ignored by the literature for centuries."

While duty sex is consensual, it’s motivated not by desire but by “the feeling that you have to,” says Kilimnik. That might be for reasons ranging from not wanting your partner to be angry to the fear that they might leave you, or the sense that you have a responsibility to your partner to engage in sex.

The data revealed that people with NSE histories reported higher frequency of duty sex. They also found that people with lower levels of sexual satisfaction and higher levels of sexual pain reported more frequent duty sex.

“These relationships can be bidirectional,” Kilimnik points out, particularly with regard to duty sex and sexual pain and dysfunction. In other words, people may have more duty sex because they don’t enjoy sex due to pain or discomfort, but it’s also true that people may not find their sex lives satisfying because they’re frequently engaging in duty sex.

When the researchers controlled for sexual functioning, they found that NSEs “have this unique impact on engaging in duty sex above and beyond what sexual functioning can account for,” says Kilimnik. This is consistent with existing research that indicates those with NSE histories often have more difficulty asserting their sexual boundaries, she says.

While this paper alone can’t tell us how to improve our sex lives—and, consequently, our overall well-being—it does support the existence of an important pattern, says Kilimnik. “That pattern supports this idea that if the primary reason you’re engaging in sex is out of a sense of obligation, it can be harmful for your sex life and well-being.”

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��Ҵ�ý�ƽ�� scientist Chelsea Kilimnik is one of a handful of researchers looking at the correlation between sexual trauma and ‘duty sex.’

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Top photo: iStock

How we can, why we must transform food systems

Rachel Sauer — Mon, 21 Apr 2025 19:07:24 +0000

How we can, why we must transform food systems Rachel Sauer Mon, 04/21/2025 - 13:07

Laura Vang Rasmussen , Ingo Grass , Claire Kremen and Zia Mehrabi

Evidence shows that diversified farming is key

If you had to pick the single most important thing driving the overshooting of multiple planetary boundaries, it would be the food we eat and how we produce that food. The environmental grand challenges of our day—biodiversity loss, climate change, freshwater use and pollution—all tie back to our food systems.

So also do our social challenges: As of writing, one in four people around the world does not have reliable access to nutritious food. Our food systems need transformation. They must become environmentally safe and socially just.

For years, ecologists have advocated for designing our food systems to be diverse, like ecosystems, to help bring the planet into a safe operating space for humanity. And despite clear examples of both innovative farmers and more traditional ones around the world doing this in practice, governments have remained skeptical due to the opposition this idea poses to mainstream agricultural-development policy.

As we undertook our published research, we set out to explore if mainstream thinking surrounding agricultural development was wrong and, if so, what adding diversity back into agricultural systems might do to correct farming systems around the world.

We worked with more than 50 researchers, who in turn worked with thousands of farmers across 11 countries covering five continents, to test the idea. We covered vastly different food systems, from maize production in Malawi to silvopastoral cattle farming in Colombia, winter wheat production in Germany, strawberry cultivation in the United States and more.

One unique feature of our approach was that all co-authors participated actively in the study design to interweave the many data sets spread across the world. Our project was far from a standard research initiative; it was highly interdisciplinary, involving the co-production of knowledge among researchers from various fields and farmers.

Further, a stakeholder committee, including representatives from different levels of government, U.N. organizations, NGOs and various national farmers’ organizations, was involved in co-production through workshops and engagement activities.

We all worked together to answer a basic question: If more diversity is added into, or kept on, farms, what happens to the environmental and social outcomes we care about? Do we create a better world for people and nature?

��Ҵ�ý�ƽ�� scientist Zia Mehrabi and his research colleagues found that across systems, a general rule emerged: the more diversification done at a farm, the better. (Photo: California Strawberry Commission)

The outcomes we looked at were directly related to planetary boundaries on reducing environmental pollution, land use, biodiversity loss and the disruption of biogeochemical flows.

But, unlike earlier studies, we also assessed social outcomes at the same time, including human well-being, crop yields and food security. This integration allowed us to assess whether both positive environmental and social outcomes can be achieved at the same time, something that had never been done before in this way.

What we produced was novel: the first-ever cross-continental, multi-farming system and culturally contextual evidence from real food systems that diversifying agricultural systems helps move agriculture toward where we want it to be. We found that the benefits of diversification differed depending on the practices and farming systems they were tied to. But saliently, we found that across systems, a general rule emerged: the more diversification done at a farm, the better.

And even more promisingly, this was especially true when it came to improving food security and biodiversity at the same time—two outcomes that have previously been juxtaposed in policy and that need the world’s urgent attention now more than ever.

Critically, our study was not theoretical or abstract, nor was it run on field stations or in laboratories. It was conducted with farmers on real-world farms. The main effects we identified held up to a range of different analyses.

We even came up with a list and typology of on-farm interventions, all clearly defined, for practical implementation and support by governments, NGOs, research for development organizations and civil society groups. Importantly, the significance of these interventions is already recognized as a possible pathway toward change and was a key focus of the U.N. Food Systems Summit.

Our work provides robust evidence that investment in these areas will yield the desirable outcomes, bolstering ongoing initiatives by governments and the private sector to support these transformative actions.

Our research demonstrates that diversification represents a significant, tangible and policy-relevant step towards achieving more sustainable food systems globally: one not just grounded in theory or anecdotes but also supported by rich data, covering a vast range of farming systems across the world.

Other observations made during our research project include the insight that farmers in many locations have already been actively working against the odds, finding ways past barriers to diversification. We’ve found this in Malawi, Brazil and the United States, where grass-roots communities of farmers and social networks are mobilizing knowledge, land, seeds, equipment, processing infrastructure and markets to support this movement. Policymakers and practitioners can now support these groups by lowering the structural barriers that have limited their growth and the growth of diversified farming to date.

We are now at a critical juncture where agricultural-development policy requires urgent attention. While the action will be location dependent—diversifying systems that have been made far too simple to function properly and retaining diversity in systems where it is threatened—the time has come, and the options exist, to ensure that the damages and losses done in the past do not continue into the future.

Laura Vang Rasmussen is associate professor of geosciences and natural resource management at the University of Copenhagen in Denmark. Ingo Grass is professor and head of the Department of Ecology and Tropical Ecological Systems at the University of Hohenheim in Germany. Claire Kremen is the president’s excellence chair in biodiversity at the University of British Columbia in Canada. Zia Mehrabi is an associate professor of environmental studies at the University of Colorado Boulder.

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Evidence shows that diversified farming is key.

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Farm-diversification research wins high kudos

Rachel Sauer — Mon, 21 Apr 2025 19:03:22 +0000

Farm-diversification research wins high kudos Rachel Sauer Mon, 04/21/2025 - 13:03

Clint Talbott

��Ҵ�ý�ƽ�� Zia Mehrabi and an international group of researchers are named national champion of the Frontiers Planet Prize for research that finds environmental and social benefits of agricultural diversification

Widespread agricultural diversification could improve the health of the world’s environment and that of its people, a landmark study published last year found.

Zia Mehrabi, assistant professor of environmental studies at the University of Colorado Boulder, alongside a large group of international researchers, has been named the U.S. national champion for the Frontiers Planet Prize, the Frontiers Research Foundation announced today.

As one of 19 national champions, Mehrabi and team are in contention to be named one of three international champions, each of whom will receive $1 million in funding to advance their research. The international champions will be announced at the Frontiers Planet Prize ceremony in Switzerland in June.

Zia Mehrabi, a ��Ҵ�ý�ƽ�� assistant professor of environmental studies, has been named the U.S. national champion for the Frontiers Planet Prize.

The Frontiers Planet Prize celebrates breakthroughs in Earth system and planetary science that “address these challenges and enable society to stay within the safe boundaries of the planet’s ecosystem.” The prize puts scientific rigor and ingenuity at its heart, helping researchers worldwide accelerate society toward a green renaissance, the Frontiers Research Foundation says.

Professor Jean-Claude Burgelman, director of the Frontiers Planet Prize, said the planet faces immense threats that require bold, transformative solutions rooted in evidence and validated by science.

“Innovative yet scalable solutions are the only way for us to ensure healthy lives on a healthy planet,” Burgelman said. “By spotlighting the most groundbreaking research, we are helping scientists bring their work to the international stage and provide the scientific consensus needed to guide our actions and policies.”

Mehrabi, who leads the Better Planet Laboratory, was recognized, alongside his co-authors, for an article published last year in the journal Science titled “Joint environmental and social benefits from diversified agriculture.”

Laura Vang Rasmussen of the University of Copenhagen in Denmark and Ingo Grass of the University of Hohenheim in Germany were lead authors of the paper, which had 58 co-authors. Claire Kremen of the University of British Columbia was a senior author and co-principal investigator on the study.

The researchers found that diversifying crops and animals and improving habitat, soil and water conservation on individual farms can improve biodiversity while improving or, at a minimum, not coming at a cost to yields. Additionally, diversified farming can yield social benefits and improve food security—showing improved food access or a reduced number of hungry months, for example, particularly in smallholder systems.

The more diversification measures farms employed, the more benefits accrued, researchers observed. Essentially, the team found evidence to move toward agriculture that more closely reflects natural systems.

“If you look at how ecosystems operate, it’s not just plants growing alone. It’s not just animals or soil,” Mehrabi said last year. “It’s all of these things working together.”

Using data from 2,655 farms across 11 countries and covering five continents, the researchers combined qualitative methods and statistical models to analyze 24 different datasets. Each dataset studied farm sites with varying levels of diversification, including farms without any diversification practices. This allowed the team to assess the effects of applying more diversification strategies.

Diversified farming differs from the dominant model of agriculture: growing single crops or one animal on large tracts of land. That efficient, “monoculture” style of farming is a hallmark of agriculture after the Green Revolution, which reduced global famine by focusing on high-yield crops that rely on fertilizers and pesticides.

“The Green Revolution did many, many great things, but it came with a lot of costs,” Mehrabi says, noting that synthetic fertilizers and pesticides harm the environment.

Also, to increase labor productivity, large farms rely on mechanization, which tends to “replace people with machines.”

“If you look at how ecosystems operate, it’s not just plants growing alone. It’s not just animals or soil. It’s all of these things working together,” says Zia Mehrabi.

“So, the idea of trying to engineer nature into our agricultural systems is somewhat antithetical to the whole way we think about agricultural development,” Mehrabi says.

Making a case for a different way of doing agriculture is one thing. Implementing it on a widespread basis is something else. The dominant view, fostered by “big ag” (short for agriculture), is that “if you want to do ag, you’ve got to do it this way,” Mehrabi says.

“Our work challenges that idea, but it’s a bit of a David-and-Goliath situation,” he adds. “We have the stone, but it hasn’t yet landed.”

But it’s necessary to confront Goliath, Mehrabi contends, noting that agriculture affects all the things people care about environmentally, including climate change, water security, biodiversity, pollution, land use and habitat destruction.

A third of the Earth’s land is used for agriculture, and about a quarter of greenhouse gas emissions stem from agriculture, he notes. Climate change has reduced agricultural yields by as much as 5% to 10% in the last four decades, research has shown.

“If we want to do something about environmental issues, agriculture is one of the big buckets that we need to really, really start in.”

Separate from the research published in Science, Mehrabi has done modeling of the future state of agriculture globally if the world continues business-as-usual farming. He found that in the next century, the number of farms is likely to be cut in half and the average size of farms would likely double.

Given that, along with what scientists know about the loss of natural ecosystems as farm sizes increase, “the future looks a little bit bleak,” Mehrabi says. But this new research shows it could be different.

Though he does not suggest that all farms must be small farms, he does advise that agriculture strive to diversify systems that have been “massively depleted and massively simplified.”

��Ҵ�ý�ƽ�� the Frontiers Planet Prize, Mehrabi says he’s gratified to be recognized as one of 19 national champions. Additionally, he underscores the importance of the Frontiers Research Foundation’s financial commitment to this kind of research, calling it a “signal” to other funding entities that might follow suit.

Launched by the Frontiers Research Foundation on Earth Day 2022, the prize encourages universities worldwide to nominate their top three scientists working on understanding and putting forward pathways to stay within the safe operating space of nine planetary boundaries that are outlined by the Stockholm Resilience Center.

These nominations are then vetted at the national level, and the top scientists face an independent jury of 100—a group of renowned sustainability and planetary health experts chaired by Professor Johan Rockström—who vote for the National and International Champions.

Read a guest opinion by Zia Mehrabi and co-authors at this link. See a Q&A with Mehrabi about adding carbon-footprint labels on food at this link.

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Climate change is transforming how scientists think about their roles

Rachel Sauer — Fri, 18 Apr 2025 15:08:35 +0000

Climate change is transforming how scientists think about their roles Rachel Sauer Fri, 04/18/2025 - 09:08

Sarah Kuta

��Ҵ�ý�ƽ�� researcher Pedro DiNezio emphasizes solving the problems of climate change in the here and now

When Pedro DiNezio began studying El Niño and La Niña roughly 20 years ago, human-caused climate change was still a future problem. At that time, researchers spent much of their energy trying to show that humans were, in fact, influencing the world’s climate.

Flash forward two decades, and climate change is no longer some far-off, eventual phenomenon—it’s happening now. Communities and businesses are factoring climate change into their yearly, monthly and even weekly decisions.

Against this backdrop, climate scientists are starting to transition away from purely theoretical research and pivot toward more applied work and consulting. DiNezio, a University of Colorado Boulder associate professor of atmospheric and oceanic sciences, for example, is embarking on a new partnership with WTW, a global insurance broker and risk advisor—an exciting prospect for putting research into practice.

“We can’t stop the drought and the heatwaves, but we can do things to become more resilient, so they don’t affect us as badly—at least for a while,” says Pedro DiNezio, a ��Ҵ�ý�ƽ�� associate professor of atmospheric and oceanic sciences.

“I’m going through a career transformation right now because I’m more and more interested in solving problems in the here and now,” says DiNezio. “Because we now know so much about the climate system and about the impact it could have on society, many of us in academia are feeling that it’s time to act.”

Resilience is key

As global temperatures continue to rise, world leaders are taking steps to reduce greenhouse gas emissions. Whether their actions will be enough to stave off catastrophic warming remains to be seen. But, in the meantime, communities and businesses must prepare for and adapt to the unprecedented extremes caused by climate change.

Drought, heatwaves, wildfires, rising sea levels, coastal erosion and other ripple effects are already causing big problems—and scientists like DiNezio might be able to help solve them.

“We can’t stop the drought and the heatwaves, but we can do things to become more resilient, so they don’t affect us as badly—at least for a while,” DiNezio says. “And hopefully we can win that time we need to stabilize the climate.”

For example, research has linked hot weather with an increased risk of accidents and injuries in the workplace. Employees are more likely to suffer heat-related illnesses on hot days. But they’re also more likely to be involved with other seemingly unrelated accidents, too.

From an ethical perspective, companies want to keep their workers safe and healthy. But, from a business perspective, they also want to keep costs down—and workers-compensation insurance is a major expense.

“We’re only starting to learn the full extent of the impact of heatwaves and how we can mitigate them,” says DiNezio. “This is having a huge impact on businesses. So, how do we prevent these accidents?”

As the climate shifts, supply chains are also becoming increasingly vulnerable. When vital waterways like the Panama Canal’s Gatun Lake dry up during droughts, ships cannot reach their intended destinations on time. And those delays cost money.

“You cannot avoid these things, but at least you can know there’s a risk and plan an alternative shipping route,” DiNezio says.

Reinsurance companies are particularly interested in anticipating disasters because they already take a long-term, big-picture view of risk. While a company in one part of the world might be worried about drought and another might be focused on sea level rise, global reinsurance companies see what’s happening around the world and connect the dots.

“Reinsurance companies look for our knowledge because their scale makes them more sensitive to the aggregated effect of climate change over large swaths of the world,” says DiNezio. “They are some of the first businesses to think, ‘How do we anticipate this new climate that is continually changing and prepare for it?’”

Why now?

Climate science is a relatively new field. But, in recent years, it’s matured enough to allow researchers to make predictions that are applicable to communities and businesses.

When vital waterways like the Panama Canal’s Gatun Lake (above) dry up during droughts, ships cannot reach their intended destinations on time. And those delays cost money. (Photo: Valiant/Shutterstock)

“We are starting to see these climate events happening, we have the tools to better predict them, and the climate sector is recognizing this as a problem, as a need,” says DiNezio. “As academics, we cannot ignore them because this is no longer a theoretical exercise.”

Teaching has played an important role in DiNezio’s transformation. After joining the ��Ҵ�ý�ƽ�� faculty four years ago, DiNezio began teaching an introductory-level class on climate change for non-science majors.

Every semester, DiNezio updated the curriculum because the climate was changing so fast. That process has been a bit of a reality check.

“When you talk about it with students, especially non-science majors, they are interested in what effect this could have on their lives and their careers,” says DiNezio. “You have to think about these things more concretely.”

Concrete problems

DiNezio, like other climate scientists who are experimenting with consulting, is approaching this new career chapter with a mix of enthusiasm and anticipation.

“I’m diving into something that I haven’t done before,” DiNezio says. “Sometimes, I describe it to my friend like I’m doing another PhD. … A lot of people in my field are going through this transformation and is entirely new.”

But, in some ways, DiNezio suspects solving real-world problems may be easier than solving theoretical ones. Either way, DiNezio is looking forward to the new challenge.

“When you move away from the purely academic, the problems become really concrete,” DiNezio says. “It’s really simple: How do you prevent heat deaths or help farmers mitigate drought? For me, the new thing is the action. The transformation is, how do we act with all this information about weather and climate? It’s very different from the academic approach. Now, we have a goal.”

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��Ҵ�ý�ƽ�� researcher Pedro DiNezio emphasizes solving the problems of climate change in the here and now.

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Don’t fear the fungi

Rachel Sauer — Thu, 17 Apr 2025 13:30:00 +0000

Don’t fear the fungi Rachel Sauer Thu, 04/17/2025 - 07:30

Bradley Worrell

��Ҵ�ý�ƽ�� mycologist Alisha Quandt says there’s little reason to fear a fungi-zombie apocalypse like the one imagined in the HBO hit TV series ‘The Last of Us’

Alisha Quandt prepared herself in advance to be asked by students and others about Sunday’s season 2 premier of “The Last of Us”—the hit HBO series that imagines a post-apocalyptic future where a fungal infection on a massive scale turns the majority of humanity into zombie-like creatures seeking to infect the last pockets of civilization.

It’s not that Quandt is a super-fan of the TV show (“I’m not into zombies, honestly,” she confesses), but as a mycologist—a scientist who studies fungi—she is used to getting asked about the TV show, specifically whether the grim future it imagines is anything people need to be worried about, or whether it’s simply harmless entertainment.

“I’m happy if it gets people excited about fungi. They’re so incredible,” says Alisha Quandt, a ��Ҵ�ý�ƽ�� assistant professor of ecology and evolutionary biology.

“Especially when the TV show first debuted, it was definitely a topic people wanted to discuss,” says Quandt, a University of Colorado Boulder Department of Ecology and Evolutionary Biology assistant professor.

“And it seems like the topic (of infectious fungi) comes up in popular culture every five to 10 years. When I was starting my PhD, people were fascinated by the ‘Planet Earth’ TV series by David Attenborough, where this ant infected by Ophiocordyceps unilateralis staggers around, being controlled by the fungus. Then later, the Last of Us videogame came out, which really got people excited about (zombie) fungi.”

Quandt did her PhD research studying Cordyceps-like fungi, which is the type of pestilence the TV show identifies as the culprit for turning civilization into a hellscape populated by zombies controlled by the spiky fungi tendrils sprouting from their heads. For the record, Quandt finds that scenario very unlikely, for a variety of reasons.

No need to panic

For starters, the TV show imagines a worldwide outbreak is caused by Cordyceps-contaminated food. However, Quandt says most fungal infections in humans are caused by inhaling spores or through contact with the eyes or skin—and not through the digestive tract. She notes that in many parts of the world, people have been ingesting Cordyceps fungi for decades without incident, because they believe they contain beneficial properties.

“I’ve eaten Cordyceps in Asia, in Korea and China,” says Quandt, who remains unzombified. “It’s considered a part of traditional Chinese medicine, especially certain species. Even here in the U.S., you can find Cordyceps in coffees and teas, for example. They sell them at stores in Boulder.”

Quandt says another reason not to be overly concerned about Cordyceps is that many of them are “specialists” that have a very narrow range of hosts that they infect, down to a specific family of ant or spider. While some Cordyceps can transition from infecting one type of arthropod to another, or to jump from infecting an insect to another fungus, she says making the leap to a healthy human being is remote.

What’s more, the average human body temperature of 97 to 99 degrees Fahrenheit is not an environment that’s hospitable for many fungi, although Quandt acknowledges there are exceptions. “The Last of Us” imagines a future in which global warming has raised Earth temperatures to a point where mutated Cordyceps zombie fungi could live comfortably in human hosts, but Quandt notes that ambient temperatures of even 90 degrees Fahrenheit are still cooler than the human body.

“That’s a hard path for me to follow,” she says of an environmental change that would allow Cordyceps to evolve in such a way. “There’s a lot of assumptions that would go into that trajectory.”

��Ҵ�ý�ƽ�� scientist Alisha Quandt finds the scenario from "The Last of Us" in which a Cordyceps-like fungi causes worldwide zombification very unlikely, for a variety of reasons. (Photo: HBO)

Beyond those arguments, Quandt says there is an even more important one as to why humans don’t need to start doom prepping for a fungi apocalypse.

“My argument about why we shouldn’t be worried about a fungal pandemic is that our bodies, when fully immunocompetent—meaning healthy human bodies—are extremely well equipped to deal with fungal propagules (spores) that come into contact with our bodies, mostly through our lungs,” she says. “Fungi have this cell wall that is made up of stuff that our bodies do not make. So, our bodies are really good identifying and dealing with that.”

Quant says fungal infections do pose a risk to people whose immune systems are compromised—particularly if they have taken a heavy dose of antibiotics, because those can kill off good bacteria, which can lower resistance to harmful fungi.

“Once our immune system goes away, which could handle those types of (fungi), we have so few antifungal drugs to treat fungal infections compared to the myriad of antibiotics that we have to treat bacterial diseases,” she says.

For the immunocompromised, Quandt says one of the most concerning fungi—which just cropped up in recent years and has spread worldwide—is Candida auris.

“It is a really concerning human pathogen because it is what we call nosocomial, meaning it is hospital related. People get these infections in hospitals, and once it’s in a hospital, it can be almost impossible to get rid of it,” she says.

“People will use all kinds of bleach and ethanol but it’s very hard to get rid of the yeast once it gets into a hospital room. And the fully immunocompetent, like nurses and doctors who are not sick, can end up spreading it from room to room to sick, often elderly, patients. Unfortunately, there’s not a good defense on the ground, so to speak, once Candida auris takes hold.”

But while “opportunistic pathogens” like Candida auris can pose a risk to the immunocompromised, the number of fungal diseases that could be described as “primary pathogens”—meaning they can infect and potentially cause serious health issues for healthy individuals—is less than a handful, Quandt says.

One primary pathogen that can be found in the United State is Valley Fever, which is primarily located in New Mexico, Arizona and southern California. Farming, construction or other practices that disrupt the soil can release the fungi’s spores, which people can then breathe into their lungs. Once inhaled, Valley Fever can potentially cause fever, cough, tiredness, shortness of breath and, in limited cases, serious conditions such as pneumonia and meningitis.

“But those are the rarer things, and I’m still not worried about them becoming common because they’re still not being spread from person to person,” she says.

In contrast with the way “The Last of Us” portrays fungi as an existential threat, Quandt sees a type of virus that’s already well-known to the scientific community and the public alike as a much greater risk for causing a global pandemic. The World Health Organization estimates the COVID-19 pandemic killed 14.9 million people worldwide between January 2020 and December 2021.

“As we’ve recently seen, unfortunately, there are a lot of other places to look for more likely suspects for (global pandemics). Things that were predicted by a lot of great investigative journalists and epidemiologists, like coronavirus and other zoonotic diseases (which jump from animals to humans), pose a much greater threat to mankind,” she says.

“As we’ve recently seen, unfortunately, there are a lot of other places to look for more likely suspects for (global pandemics). Things that were predicted by a lot of great investigative journalists and epidemiologists, like coronavirus and other zoonotic diseases (which jump from animals to humans), pose a much greater threat to mankind.”

And now, back to the show

Even beyond the fact she’s not into zombies, Quandt says her training as a mycologist can get in the way of her enjoyment of “The Last of Us” as entertainment, based upon the few episodes she has watched.

“I’m probably a little too close to watch the show—especially the fruiting bodies,” she says. “Sometimes they would show a person who is dead up against a wall, and the fruiting structures look life shelf fungi,” she says.

“Those are related to mushrooms—they’re not related to (fungi) that are molds, like Cordyceps. The artistry was beautiful, so they did a good job visually, but it’s just completely inaccurate. So, it does take you out of it a little bit to watch as an expert; you have to really suspend belief.”

Another scene that inspired disbelief for Quandt was a flashback episode—prior to the fungal pandemic—when a mycologist in Jakarta is asked by representatives of the country’s military to provide guidance on how to proceed after a group of workers in a building are found to be infected with early cases of the Cordyceps contagion. After surveying the infected, the mycologist gives the military members a chilling one-word answer: “Bomb!” (As in, bomb the entire country to try to prevent the infection from spreading.)

“My husband was watching the show with me. He paused it there and he’s like, ‘What should they do?’ I was like, ‘Get all the antifungals that you can. Get all the major ones and then get the rare ones—and start pumping these people with IVs, or all the people that you think might be exposed and get going on it.’ But the fact she said ‘bomb!’ I almost found it funny, but I was also like, ‘Oh, my God, that’s so dramatic.’ Still, it’s a TV show, and I acknowledge that.”

While Quandt may opt not to watch more episodes of “The Last of Us,” she says if the TV show raises public awareness about fungi—even if the details in the show are not entirely correct—she is all for it.

“I’m happy if it gets people excited about fungi,” she says. “They’re so incredible.”

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��Ҵ�ý�ƽ�� mycologist Alisha Quandt says there’s little reason to fear a fungi-zombie apocalypse like the one imagined in the HBO hit TV series ‘The Last of Us.'

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Top image: HBO

CU grad Erin Macdonald makes it so

Rachel Sauer — Tue, 15 Apr 2025 22:18:50 +0000

CU grad Erin Macdonald makes it so Rachel Sauer Tue, 04/15/2025 - 16:18

Bradley Worrell

The 2009 math and astrophysics double major has successfully transformed herself from a scientist to an educator to a storyteller sailing with the enterprise known as Star Trek

As she worked toward completing her bachelor’s degrees in astrophysics and mathematics at the University of Colorado Boulder in the late 2000s, Erin Macdonald often enjoyed watching Star Trek: The Next Generation with her college friends. Today, she is a science advisor for the entire Star Trek franchise.

“I don’t think I could have ever conceived it, that being able to work in television and movies was a real thing that people could actually do,” Macdonald says in retrospect. “And if you told me that I would see my name in TV credits—not to mention in the Star Trek font with the Star Trek theme playing—it’s almost unbelievable.”

It’s been a remarkable journey from academia to Hollywood, Macdonald acknowledges. Still, she is quick to add that in a multiverse of possibilities, the outcome was never assured, and it did not happen at warp speed.

��Ҵ�ý�ƽ�� alumnus Erin Macdonald, who double majored in mathematics and astrophysics, is a science advisor for the Star Trek franchise and author of Star Trek: My First Book of Space. (Photo: Bradley Worrell)

Raised in Fort Collins, Colorado, Macdonald did not grow up watching Star Trek. However, she was deeply motivated to study science after being inspired by the protagonist astronomer Ellie Arroway in the movie Contact, as well as by fictional FBI agent and medical doctor Dana Scully in the popular TV show The X-Files.

“I watched The X-Files growing up, and Dana Scully for me was just the coolest woman who ever existed. That really sparked an excitement to be a scientist,” she says. “And then when Contact came out, watching Dr. Ellie Arroway use a telescope to find aliens, and seeing her legitimately work as an astronomer was the first time I ever saw that as a career.”

Still, there were some obstacles to overcome, Macdonald says, including the fact that math did not come naturally to her.

“In high school, I had friends who were taking classes that seemed to get it. And for me, I felt like I was trudging through mud trying to understand things—but knowing that I had to get through the math,” she says. Finally, when taking a Calculus 3 course at ��Ҵ�ý�ƽ��, she says she experienced a breakthrough when she came to understand how math worked with physics, and then “everything just clicked.” It prompted her to immediately declare a double major in mathematics and astrophysics.

Gaining another role model

It also was in college that Macdonald was first exposed to Star Trek through a tightknit group of fellow students who were big fans of the TV shows.

“In the Venn diagram of physics majors and Star Trek fans, there is a big intersection,” she says with a laugh. “I was in my early 20s and (fictional) Voyager Captain Catherine Janeway became my new Scully. She was someone who had gone from being a science officer to a captain. At that point, I knew I wanted to get my PhD, but I didn’t necessarily want to be a researcher as a career. So, Janeway was a role model, how she was a leader and a problem-solver and a mentor. It was something I aspired to.”

After graduating from ��Ҵ�ý�ƽ�� in May 2009, Macdonald enrolled at the University of Glasgow in Scotland, where she earned her PhD in astrophysics in 2012. Normally, a master’s degree would be the next educational step after obtaining an undergraduate degree, but Macdonald credits the quality of the education she received at ��Ҵ�ý�ƽ��—and particularly the research opportunity and mentorship of astrophysics and planetary sciences Professor Jeremy Darling—with allowing her to immediately advance to working toward a doctorate.

After obtaining her PhD, Macdonald spent two years doing post-doctoral research at Cardiff University in Wales, United Kingdom. She later moved back to Colorado, where she worked as an adjunct professor in the community college system and as an educator at the Denver Museum of Nature & Science for about a year, then transitioned to work as an aerospace engineer for a contractor based in the Denver area.

“In the Venn diagram of physics majors and Star Trek fans, there is a big intersection,” says ��Ҵ�ý�ƽ�� alumnus Erin Macdonald. (Photo: Bradley Worrell)

It was during her time working for the contractor, and while attending pop culture conventions for fun, that Macdonald hit upon the idea that she could combine her deep knowledge of astrophysics with her love of science fiction to give talks on the science of science fiction TV shows, movies and videogames at fan conventions.

“After a while in the private sector, I found I really missed teaching. I was already going to conventions, so I proposed giving talks,” she says, adding that event organizers were receptive to the idea. “For topics, a popular one is physics and Star Trek. I’d say, ‘I did my PhD in gravitational physics, so let me explain how (theoretically) warp drives work, because I actually know the science of how warp drives work.’”

To boldly go …

In 2017, Macdonald moved to the Los Angeles area, where she continued to work in the aerospace industry while also giving science/science fiction talks at fan conventions, or as she describes herself in that time: “rocket scientist by day, warp engineering expert by evening.” It was during that period that she began meeting actors and writers at fan events, which ultimately led to industry connections with executives at CBS, the producer of all things Star Trek.

Macdonald was initially hired to give talks at CBS-sponsored events, including Star Trek Cruises. That led to an introduction with the co-executive producer of Star Trek Discovery, who asked Macdonald to serve as a science advisor for the show as season 3 began production.

“I believe I did a good job on that season, so I think the executives saw value in hiring a science advisor to be available to all of their shows to maintain consistency across the franchise, to understand all of the made-up technologies that we have in Star Trek and to be able to communicate that to the writers as well,” she says. “That’s been going on since 2019, so almost five years now.”

Meanwhile, Macdonald has written four screenplays, and she has done voice acting for Star Trek Prodigy, an animated Star Trek show, during which she had the opportunity to work with Kate Mulgrew, the actress who played Captain Janeway on Star Trek Voyager.

“When I started working on Star Trek Prodigy, they were bringing Captain Janeway back as a teacher for young kids. I was going to help write some of her lines, and that was when I had this huge epiphany of—I’m not meant to become Captain Janeway; I’m meant to write Captain Janeway and create characters that inspire kids to become scientists.”

“When I started working on Star Trek Prodigy, they were bringing Captain Janeway back as a teacher for young kids. I was going to help write some of her lines, and that was when I had this huge epiphany of—I’m not meant to become Captain Janeway; I’m meant to write Captain Janeway and create characters that inspire kids to become scientists,” she says. “And so now, I find that storytelling lets me sort of inspire and motivate the next generation of STEM professionals, and that’s what I want to do as a career.”

Macdonald has found her voice as a storyteller in several different ways. In 2022, she published Star Trek: My First Book of Space, an illustrate children’s board book that uses Star Trek to talk about science, technology, engineering, arts and math (STEAM), and she wrote and narrated the Audible Original “The Science of Sci-Fi” in collaboration with The Great Courses.

Additionally, in 2021, McDonald created Spacetime Productions, a film development and production company devoted to giving representation to traditionally marginalized voices, including those in the LGBTQIA+ community. The company has produced two short films including Identiteaze, released on the streaming service Nebula earlier this summer.

Reflecting on her journey from scientist to educator to storyteller, Macdonald says her success is the result of recognizing good opportunities, trusting her instincts, perseverance and, most importantly, putting in the time and work to achieve her goals.

“You know, I didn’t quit my PhD and move to LA with no plan. I took those important steps in between,” she says. “And it took me until well into my 30s for me to realize what I wanted, to be a storyteller and create those Dana Scullys and Captain Janeways, as opposed to becoming one of those characters. And that’s OK. All of those steps along the way helped inform the work I do now.”

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The 2009 math and astrophysics double major has successfully transformed herself from a scientist to an educator to a storyteller sailing with the enterprise known as 'Star Trek.'

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Professor John Cumalat wins 2025 Hazel Barnes Prize

Rachel Sauer — Fri, 11 Apr 2025 22:19:58 +0000

Professor John Cumalat wins 2025 Hazel Barnes Prize Rachel Sauer Fri, 04/11/2025 - 16:19

Cumalat ‘literally re-shaped our understanding of the fundamental particles making up the known universe,’ colleagues note

John Cumalat, professor of distinction in the University of Colorado Boulder Department of Physics, has been awarded the 2025 Hazel Barnes Prize.

Established in 1991 by former chancellor James Corbridge to honor the late Hazel Barnes, ��Ҵ�ý�ƽ�� professor of philosophy from 1953-86, the $20,000 Hazel Barnes Prize celebrates the enriching interrelationship between teaching and research and is the largest and most prestigious award funded by the university.

“Professor Cumalat is an exemplary educator and researcher whose contributions to his students, this university and the field of physics are highly deserving of recognition,” said Chancellor Justin Schwartz. “His selection as the Hazel Barnes Prize winner reflects his dedication and ingenuity, and I am so proud of all the ways he utilizes these qualities in service to ��Ҵ�ý�ƽ�� and to humanity.”

Cumalat completed his PhD in physics from the University of California Santa Barbara in 1977 and his postdoctoral work with Fermilab in Batavia, Illinois, in 1979. Since joining the ��Ҵ�ý�ƽ�� physics faculty in 1981, he has garnered multiple honors, including the Best Should Teach Award in 2003, the Robert L. Stearns Award in 2010 and the BFA Excellence in Service Award in 2013. He became a professor of distinction in 2014.

“John is an educator in the broadest sense and has had a lasting impact on his students and colleagues. He leads by example, he leads from the front, and he leads with integrity and compassion.”

Best known for his research in particle physics and for his development of state-of-the-art particle-detector technology and instrumentation, Cumalat is a member of five professional organizations: Sigma Xi, the American Association for the Advancement of Science, the American Association of Physics Teachers, the American Astronomical Society and the American Physical Society.

He is also a member of the Compact Muon Solenoid experiment at the Large Hadron Collider at CERN, the current principal investigator of the CU High Energy Physics Department of Energy Grant and the principal investigator of the Professional Research Experience Program with the National Institute of Standards and Technology.

Cumalat has authored or co-authored more than 1,500 publications and has been cited nearly 200,000 times, according to INSPIRE, an online hub that collects scholarly work in the field of high-energy physics. He has also served on several dozen graduate-student committees and on approximately 150 undergraduate-student thesis committees.

In their letters supporting Cumalat’s nomination for the Hazel Barnes Prize, several of his colleagues noted the significance of his contributions to the field of physics.

“John Cumalat has literally re-shaped our understanding of the fundamental particles making up the known universe,” wrote ��Ҵ�ý�ƽ�� Professor of Physics James Nagle. “His research focuses on the fundamental building blocks of matter and his leadership has led to critical advances in our understanding of quarks as well as the discovery of the Higgs boson.”

“John is one of the very best physicists that I know,” said Joel Butler, a distinguished scientist at Fermilab. “He is well-known and greatly respected throughout the U.S. and in the world. I consider it one of the most fortunate aspects of my own career that I have had this long and productive association with him.”

Other colleagues brought attention to Cumalat’s role in expanding and improving physics education at ��Ҵ�ý�ƽ��.

“John’s leadership was critical in the expansion of the number of physics degrees in the College of Arts and Sciences,” said ��Ҵ�ý�ƽ�� Professor of Physics Paul D. Beale. “I believe that John’s most important and lasting contribution to teaching and learning is his leadership in expanding the number of physics students engaged in undergraduate research, especially conducting honors research projects with members of the physics faculty and other scientists and engineers.”

“John is an educator in the broadest sense and has had a lasting impact on his students and colleagues,” said Patricia Rankin, former physics professor at ��Ҵ�ý�ƽ�� and current chair of the Physics Department at Arizona State University. “He leads by example, he leads from the front, and he leads with integrity and compassion.”

“I am honored to be selected by previous Hazel Barnes winners as the 2025 Hazel Barnes Prize winner,” says Cumalat. “I particularly value my colleagues in physics nominating me for the award and for soliciting external supporting letters from students and national and international colleagues. I am humbled by the entire process.”

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Cumalat ‘literally re-shaped our understanding of the fundamental particles making up the known universe,’ colleagues note.

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CU alum Stephen Koehler enjoys high-flying career

Rachel Sauer — Wed, 09 Apr 2025 18:14:40 +0000

CU alum Stephen Koehler enjoys high-flying career Rachel Sauer Wed, 04/09/2025 - 12:14

Bradley Worrell

The ROTC cadet and physics major turned naval aviator turned admiral was appointed commander of the U.S. Pacific Fleet in early 2024

University of Colorado Boulder grad Stephen T. Koehler (Phys’86) has a really, really big job.

How big?

It covers an area encompassing 100 million square miles—roughly half the earth’s surface—from Antarctica to the Artic Circle and from the western U.S. coast to the Indian Ocean. The job includes oversight of about 200 ships, 1,500 aircraft and 150,000 military and civilian personnel.

��Ҵ�ý�ƽ�� grad and U.S. Navy Admiral Stephen Koehler (Phys’86) was selected as the commander of the U.S. Pacific Fleet in April 2024, following a succession of leadership positions in the Navy.

Admiral Koehler is the commander of the U.S. Pacific Fleet, a position he assumed in April 2024 after a series of successive leadership positions during his 40-year career in the Navy. He became the 36th commander since Admiral Chester Nimitz assumed command on Dec. 31, 1941, at Pearl Harbor.

Koehler’s ascension to a top leadership post in the Navy is perhaps even more notable given that his initial goal was modest: He wanted to fly jets like his dad, who was a Navy fighter pilot.

“Honestly, I didn’t know I would stay in the Navy this long,” he says. “But from a very young age, I watched my dad go to work to fly airplanes and I just thought he was so cool, and I remember thinking, ‘I want to do what he does.’ My dad loved being a fighter pilot. So, I knew I wanted to fly jets and land them on ships.”

After being commissioned in 1986 through the Naval Reserve Officers’ Training Corps (ROTC) program at ��Ҵ�ý�ƽ��, Koehler became a naval aviator in 1989 and went on to fly more than 3,900 hours in the F-14 Tomcat and F-18 Hornet, with 600 carrier landings.

Koehler subsequently served in leadership positions that included commanding a fighter squadron, serving as the captain of a nuclear aircraft carrier, commander of a carrier strike group, commander of the U.S. Third Fleet and director for strategy, plans and policy for the Joint Staff in Washington, D.C., which was his last post.

Recently, Koehler spoke with Colorado Arts and Sciences Magazine about how his time at ��Ҵ�ý�ƽ�� helped him prepare for his career in the Navy, what it was like to be a naval aviator and what his job entails as commander of the U.S. Pacific Fleet. His responses have been lightly edited and condensed for space.

Question: Why did you decide to attend ��Ҵ�ý�ƽ��? And why did you choose to get your degree in physics?

Koehler: The main reason I ended up applying to ��Ҵ�ý�ƽ�� was that the summer before my senior year in high school, I was taking a Greyhound bus around the country, rock climbing with my cousin. We stopped in Boulder for a week and we stayed with this guy who was a friend-of-a-friend type thing. We climbed nearly every day.

One day it rained bad enough we couldn’t climb, so we heard there was a campus in town and we decided maybe we should walk around it. I picked up an application at the UMC (University Memorial Center), where it stayed in my backpack for the rest of the summer. Later, I filled it out and sent it in, and then I got accepted.

I saw CU had a physics major and it had ROTC, so I said, ‘I’ll give it a go.’

Admiral Stephen Koehler (right) with his father, who was also a naval aviator, following the younger Koehler’s commissioning in 1986 during a ceremony held at Old Main on the ��Ҵ�ý�ƽ�� campus.

I knew I wanted to be as competitive as I could going into Navy flight school. And initially, I thought I might want to be a test pilot—and I knew you had to have hard-science capability for that, so that’s why I majored in physics. I was not a natural physics guy, so it was a slog for me, but I did it to keep my options open.

Question: Do you feel like your time at ��Ҵ�ý�ƽ�� helped prepare you for entering the Navy?

Koehler: Yes. Certainly, the ROTC piece provided an understanding of the Navy even beyond what I learned as a child of a Navy parent, and it taught me about leadership.

The physics background proved very beneficial, not only for flight school, but it led to me being selected to be a nuclear-trained officer. There is a technical degree that’s required to do that, and so, yes, my time at CU set me up for that.

Question: When people think of naval aviators, they likely think of the movie Top Gun. What is it like to be a naval aviator in real life?

Koehler: People who watch Top Gun think you are all tan and spend your days playing volleyball at the beach, or they watch Top Gun: Maverick and think you’re all tan and you play football on the beach (laughs). And arguably, I would love to do some of that, but being a carrier-based fighter pilot is about being steeped in professionalism.

Naval aviators train and train so that they make the extremely difficult look easy and routine when it’s not. It takes skill to land a plane on a pitching (ship) deck, day or night, and it takes dedication to be a fighter pilot, to make sure that you are better than the adversary. It’s about having a warrior mindset and making sure you are good at it, because you’ve got to be better than your opponent.

Question: What is your call sign and how did you get it?

Koehler: It’s Web. I won’t go into the whole boring story, but it’s short for Webster’s Dictionary. I received it during a very public display for a lack of spelling prowess (laughs). And I’m actually not a bad speller, but I was on that day.

I wish it (the call sign) was for something cool, like ‘spiderweb,’ or ‘he’s on the web.’ That’s probably half the reason it stuck—because it sounds cool even though it’s not (laughs). …

Now, even at this level, people call me by that name instead of my (given) name. I was sitting in the situation room in the White House in my last job and people would call me Web—not Steve or Admiral Koehler. They would be like, ‘Hey, Web, what do you think about this?’ So, that’s just what ends up happening.

Question: How does one go from being a naval aviator to a command where you are responsible for hundreds of ships and planes and tens of thousands of sailors?

Koehler: So, it’s a process. The first step of it is staying in the Navy and being promoted to the command of a squadron, which is 12 planes and about 250 people. You’re evaluated and then there’s normally two paths after that. You either go the nuclear power route, which means you learn to drive aircraft carriers, or you stay in the air wing and you’re in command of an air wing on a carrier.

The U.S. Pacific Fleet (a portion of which is pictured here) encompasses 100 million square miles from Antarctica to the Arctic circle and from the west coast of the United States into the Indian Ocean. The U.S. Pacific Fleet consists of approximately 200 ships, 1,500 aircraft and 150,000 military and civilian personnel. (Photo: U.S. Navy)

I was chosen to go the nuclear power route, so my physics degree proved useful. I went to nuclear power school and then I was the No. 2 guy on an aircraft carrier, the USS Carl Vinson. I went on to command the USS Bataan, which is an amphibious assault ship, and then I was selected to be the captain of a nuclear aircraft carrier for two and a half years, which was the USS Dwight D. Eisenhower.

Pending your performance and time in service, you may be selected to the rank of rear admiral (or flag rank). If you are not selected, there’s mandatory retirement at 30 years.

I was selected after my command of the aircraft carrier and have progressed through operational and staff command that yielded additional flag rank promotions. There was a decision by Naval leadership at some point to promote me to full admiral and select me to be the Pacific Fleet commander. So, it was a natural progression, and I’m very honored to be here.

Question: Can you share the scope of your duties as Pacific Fleet commander and the role the position plays in the world today?

Koehler: The scope and scale of the Pacific Fleet, of the area I’m responsible for as far as naval interests, is from the coast of California to the west coast of India, and Antarctica to the Arctic. It’s a huge area. …

The Pacific Fleet command is of vital importance to national security, resulting from the economic ties and the commerce that travels on the ocean, for which I am responsible on the Navy side to be ready to respond. There’s just a real importance to the job and there’s a lot of work to do out there. We must continue to improve our position and capability to maintain and ensure the freedom of the seas. The intent is a ‘free and open Indo-Pacific,’ with freedom of commerce, sovereign rights and the ability to sail and operate in accordance with international law, and those things the Pacific Fleet works continuously to provide.

Question: What is the best thing about being Pacific Fleet commander? And what is the most difficult thing?

Koehler: The best thing is having the opportunity to lead all of these sailors. With sailors and civilians, there is on the order of 150,000 of them working toward a common goal, which is to achieve our national objectives. The opportunity to go out and see them and lead them is the best. That also delves into the challenge, which is that it’s a large scale and scope of operations that I oversee. The challenge is to be able to get out and see them as much as I would like and revel in the success they have. They are a pretty amazing group of people who do some outstanding work.

Admiral Stephen Koehler salutes during a 2024 ceremony at Pearl Harbor. (Photo: U.S. Navy)

Question: Do you still get to fly jets?

Koehler: I wish I did. I did get to fly as an admiral when I was the carrier strike group commander and we were on deployment in 2017. I got my last carrier landing in April of 2018.

Flying is a young person’s game. Not that I wouldn’t continue to go flying … but there’s no time to maintain my currency and while it would be fun for me, I’m not sure it would be the best use of my time now.

Question: With your four decades of service in the Navy, are there a few standout moments in your career?

Koehler: That’s a really hard one. First of all, it’s been 40 years, but it doesn’t seem like it. I got to Colorado (as a freshman) in 1982, and it feels like I was just there. …

There are all sorts of things I remember. Taking command of an aircraft carrier, with 3,000 people assigned to it, and with the air wing it’s 5,000 people. That was the first huge command for me, and you have all of these sailors that you get the privilege to lead.

Certainly, the news that I was going to be Pacific Fleet commander was memorable. That was something I would never expect. It’s the honor of a lifetime to do that, and to follow in the footsteps of some amazing people, starting with Admiral Nimitz in World War II.

Another standout thing was being the demonstration pilot for the F-14 at air shows and having the opportunity to fly in front of my family at the Miramar Air Show in 1996. It was an amazing day to fly for my dad that day.

Looking back, there are many memories, and it’s been nothing but a really fun, challenging, rewarding experience. I have been able to enjoy it with my wife, Gina, who’s been with me since college, where we met in 1983 in Boulder in the Baker Hall dorm. She’s been with me the whole time, which has just been amazing.

Question: Anything else you would like to add?

Koehler: Go Buffs!

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The ROTC cadet and physics major turned naval aviator turned admiral was appointed commander of the U.S. Pacific Fleet in early 2024.

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Top image: Admiral Stephen Koehler (green flight suit) was designated a naval aviator in 1989 and flew more than 3,900 hours in the F-14 Tomcat and F-18 Hornet, with 600 carrier landings.

Who has the influence to curb gender bias in STEM?

Rachel Sauer — Tue, 25 Mar 2025 13:30:00 +0000

Who has the influence to curb gender bias in STEM? Rachel Sauer Tue, 03/25/2025 - 07:30

Cody DeBos

Hint: It’s not women

When Charlotte Moser started graduate school, she was the only woman in a shared office with four male students. One day, a classmate casually remarked that he wished she weren’t there so the office could be all men.

Moser barely had time to process the sting of the exclusion before another male student cut in, calling out the remark as gender bias.

“It felt so great to have someone stand up for me,” Moser recalls. “I felt like someone had my back and I belonged in this space.”

Charlotte Moser, a research associate in ��Ҵ�ý�ƽ�� Department of Psychology and Neuroscience, studies how allyship in male-dominated fields influences workplace culture.

That moment stayed with her—not just because of the personal validation, but because it led her to begin exploring a larger pattern in workplace dynamics.

Now as a research associate in the University of Colorado Boulder’s Department of Psychology and Neuroscience, Moser studies how allyship in male-dominated fields influences workplace culture. Her findings reveal an unsettling but potentially useful truth: When men openly advocate for gender equality, their voices often carry more weight than women’s do.

The reason? Not necessarily gender, Moser says, but power and influence.

The social influence gap

Moser’s research suggests that in STEM workplaces, where men hold most leadership positions, male allies are perceived as more persuasive, more legitimate and more effective at creating a culture that supports gender equality than their female counterparts.

“We find that men who advocate for gender equality and act as allies tend to be better at signaling to women that they will belong and be respected in male-dominated STEM contexts than when women advocate for gender equality,” Moser says.

Her findings suggest that allyship in male-dominated workplaces isn’t just about intent or even gender. Rather, it’s about who is perceived as having the power to create change.

If a female scientist points out that women are often overlooked for leadership roles or promotions, she may be met with skepticism or dismissed as self-interested. But when a male colleague makes the same argument, research shows that their remark is more likely to be taken seriously and perceived as a norm-setting statement rather than a personal complaint.

“Other work has found that men tend to be perceived more positively than women when advocating for gender equality,” Moser explains. “Women tend to be viewed as whiners, complainers, and only acting in their own self-interest.”

The cost of exclusion

Gender bias in the workplace isn’t a theoretical issue. It has real repercussions.

Car-crash dummies designed to represent women’s bodies weren’t introduced until 2011. Even today, they are tested only in the passenger seat, not the driver’s seat. (Photo: Lin Pan/Wikimedia Commons)

“A huge consequence is the loss of the contributions from many brilliant women scientists,” Moser says.

Research shows that women are less likely to be retained in male-dominated fields due to factors like persistent bias, exclusion and a lack of support. With fewer women present to offer their perspective, blind spots emerge, and those gaps can have serious, even deadly, implications.

One striking example is the case of crash-test dummies.

“For decades, car-crash dummies were built to represent the average body of a man,” Moser says. “This led women to be much more likely to fall victim to serious injury and death in car crashes.”

Shockingly, car-crash dummies designed to represent women’s bodies weren’t introduced until 2011. Even today, they are tested only in the passenger seat, not the driver’s seat. Recent statistics show that women are 17% more likely to be killed in a car accident and 73% more likely to be seriously injured than male occupants.

This oversight isn’t an accident, but the denouement of decades of scientific decision-making that lacked diverse perspectives.

“More inclusive science is better for everyone—not just those who face bias,” Moser says.

Going beyond performative allyship

If allyship from men is perceived as more effective, what should they do to ensure their support is genuine and impactful?

Moser has a few recommendations.

“I would say that men who don’t know where to start could start within their own spheres. Pay attention to what’s going on, how people are treated, and listen to the women around you,” she says.

But listening is only the first step.

Moser emphasizes that standing up against gender bias isn’t just about making statements on social media or in private. Meaningful allyship requires action.

Calling out dismissive remarks in a team meeting or challenging biased hiring decisions can have an immediate effect. Those in leadership positions can stretch their influence further by advocating for equitable organizational policies and ensuring women have access to mentorship and career-advancement opportunities.

“One hurdle for men regarding allyship for gender equality is that they feel that it is ‘not their place,’” Moser says. “I hope that my work can show that allyship from men is not only wanted but very beneficial to women.”

However, Moser warns that inauthentic allyship—publicly claiming to support gender equality without backing it up—can make meaningful change even harder to achieve.

“The future of allyship isn’t just about who speaks. It’s about who gets listened to.”

“I have other work showing that it is worse to claim allyship but then do nothing to promote equality than if one had said nothing about inequality and allyship in the first place,” she says.

Who deserves to be heard?

Moser’s research makes clear the fact that eliminating gender bias in the workplace isn’t a matter of men versus women. Rather, it’s about recognizing and altering the systems that create credibility and influence.

“I think allyship can change the narrative of the widespread belief that most men don’t care about women and change the narrative that it’s women’s responsibility to make these workplaces work for them,” she says.

But the goal isn’t just getting men to use their influence—it’s about redistributing power so that women’s voices carry the same weight without needing male validation.

“The future of allyship isn’t just about who speaks,” Moser explains. “It’s about who gets listened to.”

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Discovering Boulder County’s tiniest residents

Rachel Sauer — Mon, 24 Mar 2025 17:10:47 +0000

Discovering Boulder County’s tiniest residents Rachel Sauer Mon, 03/24/2025 - 11:10

Collette Mace

��Ҵ�ý�ƽ�� alum and experienced caver Dave Steinmann recently discovered a new species of pseudoscorpion in Mallory Cave, with a moniker honoring its namesake hometown

When Dave Steinmann (Phys’90) first started classes at the University of Colorado Boulder in 1984, he had never explored a cave before and never really thought much about caves. However, when his new dorm-mate suggested they try his dad’s favorite hobby of caving, what seemed at first like an adventurous new pastime soon turned into a lifestyle for Steinmann—one that he has continued for more than 30 years and leading to his discovery of almost 100 new cave-dwelling species.

Steinmann, now a research associate with the Denver Museum of Nature & Science’s Zoology Department, most recently discovered a new species of pseudoscorpion named after the city closest to where it was found—none other than CU’s hometown of Boulder. Steinmann said that he knew almost immediately that the critter that is now known as Larca boulderica was a new species.

Dave Steinmann (right) with his son, Nathan (left), and wife, Debbie (center), as they get ready to go caving. (Photo: Dave Steinmann)

When he first spotted it in Mallory Cave, one of Boulder’s most well-known cave systems thanks to its role in bat conservation, he immediately noticed its unique, almost lentil-shaped body and adaptations for cave living, such as its pale color. These specimens were later verified as a new species by Mark Harvey, a pseudoscorpion expert at the Western Australian Museum; Harvey and Steinmann recently published details of the discovery in ZooKeys.

Steinmann notes that it’s typically not difficult to discern when a specimen is a new species, as it happens pretty frequently in the ancient cave systems right below our feet.

“I always say that if I want to discover a new species, I just need to visit a new cave,” he says.

Why are caves such a great place to make new discoveries? The answer lies in their role as a sort of refuge from climate change, Steinmann notes. In caves, insects can hide from the effects of temperature, floral and faunal changes that happen more rapidly in the outside world, facilitating isolated evolutionary changes.

Changing cave life

However, even cave life is changing. Lately, the temperature inside of caves, typically very cold, has been observed to be rising on a minuscule scale. Although this may seem trivial, even a few degrees’ difference can have immeasurable effects on the delicate life structures within the caves.

Similarly, outside temperatures affect which species go in and out of the cave systems, most notably bats. With the recent spike in white-nosed syndrome in bat populations, the number of bats in cave systems has decreased dramatically, with disastrous effects on internal cave species such as Larca boulderica, who survive on organic material—most often wood brought into the cave—and guano (bat fecal matter).

These changes are slow to progress, though, and there is still time to save cave ecosystems like that of Mallory Cave, which is closed to the public to protect the bat population inside (although it’s still possible to hike up to the cave entrance, a pleasant and short hike for anyone hoping to get outside).

So, how did Steinmann spot these teeny tiny bugs who live on bat feces? Well, after more than 30 years of experience, he has some tricks up his sleeve. One of the easiest methods he uses to spot tiny critters is simply by turning over rocks or pieces of wood.

When species like pseudoscorpions are disturbed by the movement or sense the carbon dioxide released by human breathing, they tend to skitter in every direction, looking for a new spot to curl up and revel in the damp darkness. When they move around, according to Steinmann, it’s just a game of whether you can catch them quickly enough.

The newly described pseudoscorpion Larca boulderica is about the size of a sesame seed and is only known to live in Boulder, Colorado. (Photo: Dave Steinmann)

To catch samples, Steinmann usually brings simple tools along with him—a painter’s brush and some rubbing alcohol. When the brush is wetted with the alcohol, it’s easy to run it along a surface and pick up all of the tiny things residing there, including minuscule species of bugs like Larca boulderica.

From there, it’s also easier to see what he’s found, as cave species are usually albino due to the lack of melanin— they don’t need pigmentation when there’s no sunlight—and they stand out against the dark ground and hairs of the paintbrush.

Looking for a gold bug

Despite being at it for multiple decades, Steinmann has no plans to slow down his caving career any time soon. He’s even made it a family pastime, and often spends time caving with his wife, Debbie, and his son, Nathan. He keeps an ongoing list of caves he plans to visit in the future and looks forward to making even more discoveries.

“I’d really like to find some kind of gold-colored bug and name it after the university,” he says, “or maybe even Coach Prime!”

He’s also enthusiastic about getting more students involved in caving, including caver and photographer Andres “Andy” Better, who will be a CU transfer student next fall. Steinmann emphasized how many different opportunities lie in the caving experience and says students of any background could find a niche interest in the hobby.

He also mentions local groups and clubs for both new and experienced cavers, including the Front Range Grotto and the Colorado Grotto, which meets at the Colorado School of Mines. He says that while anyone is welcome in caving, experienced members of the clubs can sometimes be protective of the places they visit, as human disturbances can harm delicate cave ecosystems, and caving as a hobby can be dangerous in a lot of ways.

However, if you’re looking to learn about caving with curiosity and respect, any of these clubs are great ways to get involved in this adventurous and exciting hobby—just be careful not to step in the bat guano because there could be a new species in there!

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��Ҵ�ý�ƽ�� alum and experienced caver Dave Steinmann recently discovered a new species of pseudoscorpion in Mallory Cave, with a moniker honoring its namesake hometown.

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