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CU Boulder commits to green chemistry

Rachel Sauer — Tue, 04 Nov 2025 18:47:17 +0000

CU Boulder commits to green chemistry Rachel Sauer Tue, 11/04/2025 - 11:47

Rachel Sauer

In May, campus leaders signed the Green Chemistry Commitment to practice and teach sustainable chemistry—an effort being encouraged and advanced by students

For much of the history of chemistry, the science was done how it was done—with fleeting or no thought given to things like lab energy consumption or the environmental persistence of toxic chemicals used in experiments. Those things were simply considered the wages of scientific progress.

As early as the 1940s, however, some chemists began asking if there were better, less hazardous, less environmentally damaging ways to do the science. By the 1990s, chemists Paul Anastas and John Warner had given a name to this new approach: green chemistry. In their 1998 book Green Chemistry: Theory and Practice, they detailed the 12 principles of green chemistry, which include preventing waste rather than trying to treat it or clean it up after the fact and designing chemical products to preserve efficacy of function while reducing toxicity.

Since that time, green chemistry has become a movement as universities and labs around the world evolve the practice and teaching of chemistry to reduce its impact on environmental and human health and safety.

In May, CU Boulder Chancellor Justin Schwarts and Department of Chemistry Chair Wei Zhang signed the Green Chemistry Commitment, not only committing CU Boulder to green chemistry in practice and principle but joining a worldwide network of universities working to expand the community of green chemists and affect lasting change in chemistry education.

The University of Colorado Boulder has been very involved in the green chemistry movement, and in May Chancellor Justin Schwartz and then-Department of Chemistry Chair Wei Zhang signed the Green Chemistry Commitment, not only committing CU Boulder to green chemistry in practice and principle, but joining a worldwide network of universities working to expand the community of green chemists and affect lasting change in chemistry education.

“Signing (the Green Chemistry Commitment) is an important step toward integrating green chemistry into curriculum, theory, toxicology and lab applications,” says Forrest Yegge, chair of the Green Chemistry CU Student Government (CUSG) Environmental Board subcommittee and a junior studying philosophy and ecology and evolutionary biology.

“Social justice-wise, I think it’s our responsibility to be more aware of the effects we are having on the environment,” adds Jules Immonen, a first-year student studying chemistry who serves as secretary of the CUSG Environmental Board. “Obviously, sustainability is something I’m passionate about, but even people who aren’t should be able to learn how to incorporate these practices in an easy way.”

Doing better chemistry

CU Boulder’s embrace of green chemistry has been growing for years, says Kathryn Ramirez-Aguilar, CU Boulder Green Labs Program manager. The Department of Chemistry and Green Labs have been partnering on green chemistry efforts on campus, leading initiatives on everything from education opportunities to sustainable lab practices. Signing the Green Chemistry Commitment (GCC) is an important step, Ramirez-Aguilar says: “It’s a huge opportunity to involve students in designing curriculum, and it aligns with CU’s Climate Action Plan outlined last year.” In fact, she adds, members of the CUSG Environmental Board have been at the vanguard of bringing the GCC to the attention of campus leadership.

Ashley Ley, a chemistry graduate candidate and member of the Green Chemistry CUSG Environmental Board subcommittee, emphasizes that green chemistry is most importantly about practice, not just theory. “If you look at someone like Dr. (Jacquie) Richardson, she’s been making changes to methods, working toward greener methods using less harmful chemicals in the Organic Chemistry Teaching Labs. In Organic Chemistry 2, there’s a lab focused on atom economy, and one of the previous (Green Labs Chemistry) team leads worked with Dr. Richardson to incorporate acetone recycling, so now organic chemistry teaching labs only use recycled acetone for cleaning.

“These labs have also started using water recirculatory buckets because there are reflux reactions where you need a ton of water and normally it would go through the condensers and down the sink. Now it’s being recirculated, and we’re saving a lot of water. Last summer, they incorporated no-touch doors in the labs [as part of a collaborative project with Green Labs], so you can get in and out of the labs without having to take off your gloves.”

In another campuswide green chemistry application, Amrita George, a professional research assistant of many years in the Department of Integrative Physiology and volunteer lead for the Green Labs Team, is working on introducing a chemical sharing initiative in which research labs share chemicals within their research building.

Kathryn Ramirez-Aguilar (left), CU Boulder Green Labs Program manager, and Matt Wise (right), director of chemistry instruction and Department of Chemistry associate chair, give a presentation about incorporating green chemistry into the introductory chemistry curriculum. (Photo: Kathryn Ramirez-Aguilar)

“This has a lot of support from the Environmental Health and Safety group,” George says. “It aligns with one of the principles of green chemistry, which is to reduce the total amount of hazardous chemicals used and, therefore, waste created. [The initiative] allows researchers to see the chemical inventory of other labs within their building and share amongst themselves rather than ordering new stocks for each lab, which is usually what researchers do. Often these stocks sit on the shelf and expire before the lab ever uses them again.”

Ramirez-Aguilar adds that the chemical sharing initiative is also a money saver for labs by reducing purchasing—which also benefits a reduction in carbon emissions similar to a campuswide focus on reducing labs’ energy consumption, as labs are among the most energy-intensive spaces on campus.

Valentina Osorio, a chemistry graduate student and member of the Green Chemistry CUSG Environmental Board subcommittee, adds that General Chemistry teaching faculty have adapted student experiments and lab processes so that they can use drops of a chemical rather than milliliters of it. This makes a significant difference when thousands of students are conducting the experiments each year.

Performing research sustainably

While the benefits of green chemistry practice and teaching are broad and affect many communities and populations, among those most affected are students, says Ana Curry, a chemistry graduate student and member of the Green Chemistry CUSG Environmental Board subcommittee: “I’m currently working in materials chemistry, and I believe strongly that if my research is focused on sustainability, I should also be performing that research sustainably.”

Osorio notes that while her research focus is environmental chemistry, “I’m studying the impacts of air and water pollution, and while I’m not really synthesizing anything, what I’m researching is largely impacted by what humans are doing.”

Yegge adds that in addition to the environmental and social justice benefits of green chemistry, “as I prepare for grad school and I’m increasingly worried about securing funding, I think that sustainable practices on campus and in labs are crucial for resilience in academia and in research. We need to be adopting these strategies so we can keep doing the science we’re doing.”

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In May, campus leaders signed the Green Chemistry Commitment to practice and teach sustainable chemistry—an effort being encouraged and advanced by students.

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Voters’ dislike of PAC donations cuts across political lines

Rachel Sauer — Mon, 03 Nov 2025 17:12:52 +0000

Voters’ dislike of PAC donations cuts across political lines Rachel Sauer Mon, 11/03/2025 - 10:12

Bradley Worrell

CU Boulder political scientist Michelangelo Landgrave’s research finds Republicans and independents share Democrats’ concerns over corporate donations in federal elections

In a time when political consensus is difficult to find, one topic that cuts across partisan lines is American voters’ disdain for political action committee (PAC) money in federal elections.

That’s one of the key findings of research recently published in the journal Research and Politics, which was co-authored by Michelangelo Landgrave, a University of Colorado Boulder Department of Political Science assistant professor whose research focus includes campaign finance and public opinions on how it can be reformed. The paper was co-authored by Aubree Hardesty, one of Landgrave’s CU Boulder postdoctoral fellows.

Pointing to a 2017 Washington Post story, Landgrave and his co-authors note in their paper that people surveyed for the article said money in politics and wealthy political donors are primary causes of political dysfunction.

CU Boulder political scientist Michelangelo Landgrave and his research colleagues found that Republicans, Democrats and independents all share concerns over corporate donations in federal elections.

“What we found is that it’s not money itself that people oppose,” Landgrave clarifies. “People are fine with small donations—$5 or $10 from an individual. What they oppose are massive contributions from corporations that ordinary citizens simply can’t compete with.”

As the research paper notes, in the 2024 election cycle, PACs contributed about $5.6 billion to presidential and congressional campaigns, representing about 65% of total contributions.

This distinction—between small, individual donations and large, corporate checks—is central to understanding public opinion on campaign finance, Landgrave says, and voters are concerned that PACs have outsized influence with candidates.

Who’s giving the money?

Voters often view PACs as conduits from special interests, allowing corporations, unions and wealthy donors to channel significant funds into the political system. Landgrave says most PAC contributions come from older, wealthier and disproportionately white Americans. Asian Americans are an emerging group in this donor landscape, but Black and Latino communities remain underrepresented in campaign financing, he says.

“That raises equity concerns,” Landgrave says. “It’s not that older white voters shouldn’t have influence—they should—but so should African Americans, Latinos and especially younger voters. It’s not just about race; it’s about age, class and general representation.”

And while some PACs, such as the National Rifle Association or Emily’s List, are notably partisan or ideological, many are more pragmatic than political, Landgrave says. Companies such as Walmart and McDonald’s often contribute to both Republican and Democratic campaigns—hedging their bets to maintain influence regardless of which party wins, he notes.

Public attitudes: a bipartisan dislike

As the researchers surveyed voters, Landgrave says one of the biggest surprises was the lack of a stark partisan divide on the issue of PAC donations.

“Starting this project, we assumed that there was going to be major partisan differences in public opinion. We assumed that Democrats—much more than Republicans—would be much more concerned about the amount of money in American politics,” he says. “But one of our big findings was that Democrats and Republicans, and also independents, want their politicians to not be accepting this PAC money.”

Again, the underlying concern is that PACs have outsized influence with politicians in return for their contributions, because those donations tend to be larger than those of individual donors, Landgrave says. He notes that previous research has found that less than 1% of Americans give more than $200 in political contributions in a given year. (For their part, PACs can contribute up to $3,500 per candidate.)

“How much influence they (PACs) actually get for their contributions is a subject for debate, but the perception by voters is that it really undermines the democratic values that we have,” Landgrave says. “The underlying concern voters have is that everyone should be able to give, but the amount should be constrained enough that, for example, one person making six figures is not able to make much bigger donations than the guy making $40,000 or $20,000 a year.”

"We assumed that Democrats—much more than Republicans—would be much more concerned about the amount of money in American politics. But one of our big findings was that Democrats and Republicans, and also independents, want their politicians to not be accepting this PAC money,” says CU Boulder researcher Michelangelo Landgrave.

The study’s findings suggest that swearing off PAC donations can be a winning strategy for Republicans and independents as well as Democrats, Landgrave says.

“While Republicans at the national level have not embraced this idea, these findings lead me to believe that an enterprising Republican candidate could make their name, especially at the primary level, by keeping their same policy positions, but really presenting themselves as this anti-corporate, populist individual,” he says.

Risks and rewards of swearing off PAC money

In recent U.S. election cycles, some candidates have made headlines by vowing not to accept PAC donations, including U.S. Sen. Elizabeth Warren, D-Massachusetts, who during her 2020 campaign said she “swore off PAC money to make a statement.” She was not the only one.

Landgrave’s notes in his paper that 44 candidates (43 Democrats and one Republican) refused PAC money during the 2020 election cycle.

Landgrave says politicians swearing off PAC contributions is a trend that has gained momentum since the mid-2010s, mirroring earlier political reform efforts dating back to the Progressive Era of the late 1890s to early 1920s, when reformers sought to address political corruption that extended to buying political offices.

Today, candidates such as Bernie Saunders, D-Vermont, have successfully built brand identities around refusing corporate donations, drawing support even from those who may not fully align with their policy platforms, Landgrave says.

His research suggests voters place as much weight on a candidate’s campaign finance stance as they do on hot-button issues such as gun control.

“That’s a big deal,” he says. “Gun control is one of the most polarizing, mobilizing issues in U.S. politics. If a candidate’s position on PAC money can mobilize voters to a similar degree, that’s a serious strategic advantage.”

Show me the (small) money

Still, given how astronomically expensive modern federal election campaigns have become, is swearing off PAC money viable moving forward?

Yes, but with caveats, Landgrave says.

He references an earlier paper by one of his co-authors that found that rejecting PAC money can be a powerful campaign message—especially when it’s clearly communicated to voters. That earlier paper noted that candidates who reject PAC money see a surge in small-dollar donations. While those contributions do not fully replace corporate funds, Landgrave says they often make up 70 to 80% of the shortfall.

“It’s a significant substitution effect,” he says. “You lose $1 million from PACs but you might get $700,000 to $800,000 from small donors instead.”

However, Landgrave says this model may not scale indefinitely.

“Right now, if you are the sort of candidate who swears off big corporate influence money, there’s enough donors that care about that to compensate you to a degree,” he says. “What’s unclear is what happens at scale. If every candidate rejected PAC contributions, would enough people change culturally to make up what they’re losing? If there’s only a few thousand people who care about this and do this, it won’t work if everyone rejects the money.”

What do voters actually know?

A common critique of public opinion surveys is that voters don’t really understand the issues they’re being asked about. But Landgrave’s research challenges that assumption when it comes to campaign financing.

“Right now, if you are the sort of candidate who swears off big corporate influence money, there’s enough donors that care about that to compensate you to a degree.”

“We’ve done follow-up work on public knowledge,” he says. “And while voters don’t ace these quizzes, they perform reasonably well. For instance, many people guess that the maximum federal contribution limit is around $3,000. The correct number is $3,500, so they’re close.

Americans surprisingly know the general rules. Maybe not all of the details, but they know more than we probably think.”

In short, the average voter may not be a political scientist, but they understand enough to form meaningful opinions—and increasingly, those opinions lean toward curbing corporate influence in elections, Landgrave says.

Studying union PACs and cultural change

Landgrave says his research on political action committees and campaign finance are ongoing. His next line of research looks at how voters view union-backed PACs, which are structured similarly but are rooted in worker representation.

Initial findings are surprising, he says.

“Americans seem to be OK with union PACs. And what’s even more surprising—so are Republicans. It’s preliminary, but it suggests people view unions differently, perhaps because they’re perceived as bottom-up organizations, rather than top-down like corporations.”

Meanwhile, looking ahead, Landgrave has another topic he would like to pursue regarding PACs and campaigns.

“In addition to the union angle, I would definitely be interested in seeing young Americans’ attitudes toward money in politics,” he says. “I can tell you that, just talking with my undergrad students, they seem even more skeptical of corporate money in politics than previous generations. They’re not anti-money—they’re fine with small donations—but they’re deeply opposed to corporate influence.”

However, Landgrave is skeptical that Congress might one day pass sweeping reform to limit or eliminate PAC donations.

“I don’t see that happening at the federal level,” he says. “The people who reach Congress are, by and large, products of the existing system.”

Instead, he sees more potential for state-level reforms, through voter pressure and ballot initiatives that limit PAC influence—a strategy that he says echoes earlier populist movements, particularly in the Plains and Rocky Mountain regions.

“Our campaign finance system isn’t set in stone,” Landgrave says. “Other countries do it differently. We could, too—if we decided that’s what we want.”

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CU Boulder political scientist Michelangelo Landgrave’s research finds Republicans and independents share Democrats’ concerns over corporate donations in federal elections.

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Top photo: Marek Studzinski/Unsplash

�鶹��Ժ learning dam good lessons from nature's busy builders

Rachel Sauer — Fri, 31 Oct 2025 13:54:40 +0000

�鶹��Ժ learning dam good lessons from nature's busy builders Rachel Sauer Fri, 10/31/2025 - 07:54

Rachel Sauer

In a capstone project partnership with the Boulder Watershed Collective, Masters of the Environment students study what it means to live alongside beavers

Beavers are so much more than nature’s most eager builders. In many ecosystems, they play a key role in nature-based solutions to flood control, habitat restoration and fire mitigation.

They are a keystone species that can increase biodiversity in suitable habitats, according to Colorado Parks and Wildlife (CPW), but they also are a source of human-wildlife conflict in Colorado. For example, beavers have been known to build dams and inadvertently flood areas that ranchers or homeowners don’t want flooded.

Jack Carter, Amanda Opp and Colin McDonald (left to right) completed a Masters of the Environment capstone project studying beavers and how they live alongside humans in partnership with the Boulder Watershed Collective. (Photo: Masters of the Environment program)

The question for conservationists, land managers and any human who cares about wildlife, then, is how to live alongside this native species that broadly engenders mixed feelings. It’s a question that University of Colorado Boulder Masters of the Environment (MENV) students Amanda Opp, Jack Carter and Colin McDonald addressed in their capstone project, which they will publicly present today at the 2025 MENV Capstone Symposium.

Partnering with the Boulder Watershed Collective (BWC), Opp, Carter and McDonald examined the social perceptions and ecological impacts of beavers via surveys, research and data collection. They talked with land and wildlife managers across the Front Range to study how public agencies make beaver management decisions, and they participated in two beaver reintroductions, developing a monitoring plan to measure ecological metrics at the sites where the beavers were reintroduced.

“I think we all read the book ‘Eager’ by Ben Goldfarb, about beavers in America and how there was a high reduction in numbers from trapping in the 19^th century,” McDonald explains. “Now there’s a movement to reintroduce them, and we have this thing about ‘coexistence’ as one of those kind of trigger words. We tried to come up with multiple things like ‘living with beavers’ in place of ‘coexistence’ or ‘reintroduction,’ which somehow give off the vibe that your life is going to change by the presence of these animals coming back, which isn’t necessarily the case.”

Back from the brink

Not too long ago, the North American beaver was on the verge of extinction because of 19th-century fashions that required the under fur of beaver pelts. At their population peak before the fur trade began in earnest, there were anywhere between 60-400 million North American beavers, according to the U.S. Fish and Wildlife Service (USFWS), but by 1900 there were fewer than 100,000.

As beaver populations began to rebound in subsequent decades thanks to conservation and reintroduction efforts, another issue emerged: Humans had moved into beaver habitat, converting “wildlife-rich wetlands into agricultural lands” and building towns nearby, according to USFWS.

For many years along the Front Range, beavers and humans have lived in an uneasy and sometimes nonexistent détente, so one of the goals of the students’ capstone project was to gather data that might help inform CPW’s beaver conservation and management strategy, which is currently being developed.

Some of the points of conflict that Opp, Carter and McDonald learned about as they collected data included ranchers concerned about losing rangeland to flooding and homeowners who were “very concerned about mosquitoes and thinking that if beavers are creating marshy areas, the risk for West Nile increases,” Opp says.

One of the beaver releases on private land near Nederland in which Amanda Opp, Jack Carter and Colin McDonald participated for their MENV capstone project. (Video: Colin McDonald)

Working with the Boulder Watershed Collective, they learned the nuances of effective conservation, which must include education, collaboration and partnership between stakeholders, Carter says: “Due to conflicts over public infrastructure and Colorado water law, reintroducing beavers is not as easy as it may seem.”

At the beginning of the 20th century, the North American beaver was on the verge of extinction because of 19th-century fashions that required the under fur of beaver pelts. (Photo: Amanda Opp)

“I think BWC, and a lot of people involved with conservation, when they’re conveying the message of ‘Hey, these are beneficial animals,’ they have to meet people where they’re at,” Opp says. “One of biggest concerns in Colorado is fire mitigation, so when we’re thinking about unique solutions, nature-based solutions that might not have been considered in the past, beavers have been a really important pitch: ‘If you have a wet environment with wet soil and healthy grass, you’ll probably have reduced risk of fire reaching your property.’”

Not just a cute animal

The two reintroductions in which Opp, Carter and McDonald participated happened on private land near Nederland, with the landowners inviting BWC to release beavers in ponds or wetlands on their land. Several of the reintroduced beavers came from Aurora, where they had been causing problems, McDonald says, so BWC and Aurora wildlife officers worked together to ensure that the beavers were trapped in families so they could be released together.

“Beavers aren’t endangered anymore, so there’s zero protection for them,” Carter explains, adding that the areas in which the beavers were released are far from settlements, hopefully giving the beavers the greatest chance to thrive.

At one of the relocation sites, the beavers had monitors attached to their tails, enabling researchers and wildlife officials to track their movements, Opp says. And at both locations, the landowners are reporting their visual observations of beaver movement to BWC, which is included in the MENV students’ monitoring plan. Their plan also includes measuring how wide the bodies of water into which the beavers were released become.

For the students, each of whom came to the MENV program as committed conservationists, their work with beavers for their capstone project was about more than busy, charismatic rodents.

“I’m really passionate about conservation and passionate about protecting animals in the wild, and this project instilled in me how rewarding this work is,” Opp says, a sentiment that McDonald echoed, adding that he appreciated learning how to build community partnerships and how to maximize impact at small nonprofits.

“Before this, I don’t think I really appreciated beavers,” Carter says. “I didn’t realize how important they are to an ecosystem. One of the biggest things that’s happening right now is biodiversity loss, and beavers create essential habitats for moose, for certain amphibian species. A lot of amphibians are going down the drain, especially in a state like Colorado, and beavers can help solve that problem.”

“The best way to move forward with all the damage humans have done is to realize we’re not separate from our environment,” Opp says. “We have to do everything we can to protect it, and beavers are a really awesome keystone species that’s not just this cute animal; they can play an important role in solving the climate crisis.”

Jack Carter, Colin McDonald and Amanda Opp (left to right) on their way to release a beaver on private land near Nederland. (Photo: Amanda Opp)

A beaver after being released on private land near Nederland. (Photo: Amanda Opp)

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In a capstone project partnership with the Boulder Watershed Collective, Masters of the Environment students study what it means to live alongside beavers.

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�鶹��Ժ finding strength in numbers

Rachel Sauer — Wed, 29 Oct 2025 20:57:16 +0000

�鶹��Ժ finding strength in numbers Rachel Sauer Wed, 10/29/2025 - 14:57

Rachel Sauer

Started by CU Boulder applied mathematics Teaching Professor Silva Chang, Colorado Math Circle is celebrating 20 years of bringing middle and high school students together in a community that has fun with math

It’s not always easy to be the student who does math for fun.

Even if the other kids aren’t weird about it, they still might not understand, so sometimes it can be easier to just brush it off. “Oh, math? Yeah, it’s OK.” But no, math is wonderful.

When one of Silva Chang’s high school teachers showed her a brochure for the six-week Hampshire College Summer Studies in Mathematics (HCSSiM) program, she wasn’t necessarily doing math for fun in her free time, but she was very good at it.

Silva Chang, a CU Boulder teaching professor of applied mathematics, was inspired to start the Colorado Math Circle in part from her high school experience in the Hampshire College Summer Studies in Mathematics program.

“I think he knew that I needed to get out of the city,” recalls Chang, a University of Colorado Boulder full teaching professor of applied mathematics. “My parents were not college educated, they didn’t speak English, so I think he saw it as an opportunity that would open up my worldview.

“(HCSSiM) was a program where we did math 24-7, and it was the most fun I’ve ever had. I can say I wouldn’t be doing what I’m doing today if I hadn’t had that experience. (The program) was transformative, it made math really fun, it made it silly, it presented math as an art form that’s not just useful for practical applications, but that’s beautiful by itself.”

Chang’s experiences at HCSSiM inspired her 20 years ago to start the Colorado Math Circle, an extracurricular organization that offers opportunities and mentoring for middle and high school math enthusiasts around Colorado. Further, she was interviewed about how HCSSiM inspired her for the documentary “Hunting Yellow Pigs,” of which there will be a free screening at 3:30 p.m. Sunday, Nov. 2, in Benson Earth Sciences room 180.

“I knew of certain students along the Front Range—all top students, some nationally ranked—and I wanted to be able to bring them together so they would have peer support,” Chang explains of starting Colorado Math Circle in 2005. “Some students can find peers, but some can’t. If you say, ‘I enjoy doing math problems all day,’ people might laugh at you, and you might try to hide that interest. I thought there should be a place where students didn’t have to hide their enthusiasm for math.”

‘Come and enjoy math’

For Chang, an interest in math grew from attending John Dewey High School in Brooklyn, New York, a school with a nontraditional pass/fail grading system and a longer, eight-hour day that allowed students to take more classes and explore their interests.

If you go

What: Free special screening of “Hunting Yellow Pigs,” a documentary about the Hampshire College Summer Studies in Mathematics program

When: 3:30-5 p.m. Sunday, Nov. 2

Where: Benson Earth Sciences room 180

Chang’s parents had emigrated from southeast China, and while they may not have been intimately familiar with the vagaries of the U.S. educational system, they knew that education led to opportunity, Chang says. However, when Chang’s teacher suggested she attend the six-week HCSSiM, her parents initially didn’t understand the significance.

With some parental convincing and bolstered by her membership on a New York City-wide high school team of top math students, Chang applied and was accepted. Initially, her family was asked to pay a small amount to attend, “and my parents said no. They didn’t have a lot of money, but I don’t think that was their reason. They were nervous about me leaving home. So, someone from HCSSiM called me up and said, ‘You turned down the acceptance, can you tell us why?’ and I said the reason was financial, so they offered a full scholarship.”

HCSSiM was started by Hampshire College founding faculty member David Kelly, who died June 20. Program organizers describe it as “college-level mathematics for talented and highly motivated high school students. It is demanding and expanding. Participants spend a major portion of each day actively engaged in doing mathematics (not simply learning the results of mathematics).”

“(David Kelly) was running the program when I attended in the 1970s, and he set the tone,” Chang says. “He just made it fun. Some of us were coming from more competitive or grade-oriented backgrounds, but his perspective was, ‘Come and enjoy math. Math is fun, math is beautiful, get what you can out of this program, take away what you can.’ They were teaching fairly high-level math, but it wasn’t competitive at all. It was like, ‘Let’s all do math together, let’s all learn together.’”

Creating a community

Participants in the Colorado Math Circle engage in a hands-on math learning activity. (Photo: Silva Chang)

After Chang came to CU Boulder and her children entered high school, she began thinking that she’d like to create a program similar in spirit and practice to HCSSiM, where students could come have fun doing math with others who love it, too. She also thought about the New York City-wide math team of which she’d been a member and wondered if there was a way to combine the two.

In 2005, she began contacting Front Range high schools and students to assemble a 15-member team that would compete in the 2006 American Regions Mathematics League (ARML) national math competition at the University of Nevada. The team won first place in its division that year “and that was very motivating,” Chang recalls, “because we were competing against teams from around the country.”

Colorado Math Circle has sent a team comprised of students from around Colorado to that competition every year since, but after that first year Chang thought it was important to create a place for students who may not want to compete but who want to get together to do, discuss and learn math.

During the school year, students either come to the CU Boulder campus or participate in weekly problem-solving Zoom sessions. Initially created with a focus on high school students, Colorado Math Circle grew to include middle school students and help those who are interested prepare for the MATHCOUNTS competition.

“The first year we were more focused on preparing for competition, but after that we expanded it to a place where students could come learn about a variety of math topics,” Chang says. “Members of my department have come to give talks about their work, and we’ve been doing it long enough that we have math circle alumni coming back now.”

For the first 17 years of Colorado Math Circle, Chang was the sole director, but now program alumnus Thomas Davids serves as co-director and ARML coach.

In its 20 years, Colorado Math Circle has steadily grown; last year, more than 110 students from 45 Colorado schools participated. Over the years, students from as far as Grand Junction, Pueblo and Rangely have participated. “We don’t draw many students from any one school—the two largest are Fairview and Cherry Creek—it’s often one student from one school,” Chang says. “The main goal of the Colorado Math Circle is to teach students math, yes, and teach them problem-solving skills, but what we really provide is a community.

“These students teach themselves a lot of math, so the need we fill is helping them to create a community of friends who love math, too.”

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Top image: The 2023 Colorado Math Circle team that competed in the American Regions Mathematics League national competition, coached by program alumnus Thomas Davids (far left, holding plaque). (Photo: Silva Chang)

Department of Geological Sciences to become Department of Earth Science

Rachel Sauer — Tue, 28 Oct 2025 16:06:36 +0000

Department of Geological Sciences to become Department of Earth Science Rachel Sauer Tue, 10/28/2025 - 10:06

New name reflects more than a century of evolution and a commitment to understanding the whole planet

Beginning in August 2026, the University of Colorado Boulder's Department of Geological Sciences will become the Department of Earth Science, a change that reflects both the department's contemporary research capabilities and the evolution of the discipline itself.

The decision, unanimously approved by department faculty and endorsed by campus and CU system leadership, comes after decades of expansion in the research and teaching mission to include areas of inquiry not typically associated with traditional notions of geology. Today, CU Boulder's Earth scientists study everything from the forces that shape landscapes and the movement of water to the evolution of ancient animals and the modern threats natural hazards pose to humans.

"'Geological Sciences' has served us well, but it also carries some old-fashioned connotations—people think of rocks and minerals. Our work today spans so much more. We study glaciers, water resources, tectonics, marine geochemistry and even the connections between life and the Earth's chemistry," says Anne Sheehan, professor and chair of the department. "'Earth Science' simply fits who we are now."

Reflecting national trends

The department’s name change follows similar updates at leading research universities across the country, including Yale, Stanford and the University of Texas at Austin, all of which have rebranded their programs to better represent the interdisciplinary nature of Earth and planetary sciences. CU Boulder’s department, which is ranked among the top programs in the nation for geosciences and Earth science by U.S. News & World Report, joins this growing movement to modernize terminology and public understanding of the field.

“It’s a broader term that more accurately represents who we are and what we do. It aligns with some of our funding agencies,” says Sheehan. “The National Science Foundation has a Division of Earth Sciences and NASA has an Earth Sciences Division. The new department name also fits perfectly with our home on campus, the Benson Earth Sciences Building.”

A natural shift

Founded in 1902 as the Department of Geology and renamed Geological Sciences in 1969, the program has evolved in step with the science itself. Research once focused largely on identifying rock formations and fossil records now uses advanced tools including satellite sensing and isotopic dating to reveal the planet's deep past and forecast its future.

“Our department is over 100 years old. It was one of the first departments at the university and the first handful of faculty at the university included people teaching geology because mining was so central to Colorado and to Boulder,” says Sheehan. “The field has expanded, and technologies such as satellites and GPS have opened up all sorts of new avenues of exploration. The field has definitely grown as you hope a vital field would do.”

Preparing the next generation

The name change coincides with another significant milestone: the conversion of the department's Bachelor of Arts degree to a Bachelor of Science degree beginning in fall 2026, a change that better reflects the scientific training students already receive. The change from a Geology BA to an Earth Science BS will not affect current students' academic requirements or degrees; it will help the department better convey its identity to future generations.

For Irene Blair, dean of the Division of Natural Sciences, the new name is about clarity and connection.

“�鶹��Ժ increasingly seek programs that connect scientific inquiry with solutions to global challenges such as sustainability and resource management,” says Blair. “Adopting the name ‘Earth Science’ clarifies for prospective students what this department already offers—a comprehensive, forward-looking education that prepares graduates to lead in science, industry and policy.”

As the department looks ahead to its next chapter, Sheehan emphasized that the new name honors both tradition and transformation.

"This change honors our history while positioning us for the future," Sheehan says. "It better represents the collective mission of the excellent faculty we have recruited, the research programs we have built and the important questions in the Earth sciences we are tackling. We bring these discoveries into our classrooms and our graduate programs to successfully train the next generation of Earth scientists.”

“And you know,” Sheehan adds, “I’m kind of hoping that there will be fewer rock jokes, but that might be hoping for too much.”

Learn more about the change

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New name reflects more than a century of evolution and a commitment to understanding the whole planet.

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Top image: a pool at Yellowstone National Park ( Photo: Denys Nevozhai/Unspalsh)

Scholar studies hydrogen gas as a clean energy source for meeting decarbonization goals

Rachel Sauer — Mon, 27 Oct 2025 20:11:12 +0000

Scholar studies hydrogen gas as a clean energy source for meeting decarbonization goals Rachel Sauer Mon, 10/27/2025 - 14:11

CU Boulder Professor Alexis Templeton will discuss hydrogen as a clean energy source and as an energy source for life in the Earth during her Nov. 20 Distinguished Research Lecture

As nations around the world work to decarbonize and bolster their energy security, many of them are turning to hydrogen gas as an alternative energy source.

At the University of Colorado Boulder, Alexis Templeton, a professor of geological sciences, is developing projects around the world with academic, government and industry partners to harvest naturally occurring, low-carbon hydrogen from beneath the Earth’s surface.

Alexis Templeton, a CU Boulder professor of geological sciences, studies how microbial life interacts with geology in extreme environments.

“Hydrogen is one of the most powerful and versatile energy sources on Earth. It has long been used to power microbial life activity in dark, rocky parts of our planet where other forms of energy are scarce, and excitingly now humans are trying to harness this globally abundant energy source as well,” Templeton says.

Templeton’s research into the geochemistry of subsurface rocks—how they interact with water to produce hydrogen—offers the promise of clean energy innovation in the not-too-distant future. She will share details about that aspect of her research—as well as how hydrogen sustains microbial life in Earth’s deep subsurface environments—in the 126th Distinguished Research Lecture, “Hydrogen: Integrating the Searches for New Energy Sources and Novel Life Activity Within the Earth,” at 4 p.m. Thursday, Nov. 20, at the Chancellor’s Hall and Auditorium, Center for Academic Success and Engagement (CASE). A question-and-answer session and reception will follow the lecture.

“I’m deeply honored to be selected to deliver a Distinguished Research Lecture on the CU Boulder campus. I truly appreciate the support of my colleagues here at the University of Colorado and in the international geochemistry and geobiology community who supported this nomination and the work that will be shared,” Templeton says.

About Alexis Templeton

Templeton is a professor in the Department of Geological Sciences and the CU Center for Astrobiology. Her research spans the globe—from volcanoes in the Pacific to cold springs in the High Arctic to the mountains and deserts of the Arabian Peninsula—but it all centers on one goal: understanding how microbial life interacts with geology in extreme environments.

If you go

What: 126th Distinguished Research Lecture, Hydrogen: Integrating the Searches for New Energy Sources and Novel Life Activity Within the Earth

Who: Professor Alexis Templeton of the Department of Geological Sciences and Center for Astrobiology

When: 4-5 p.m. Thursday, Nov. 20, followed by a Q&A and reception

Where: Chancellor's Hall and Auditorium, Center for Academic Success and Engagement (CASE)

With funding from NASA, the U.S. Department of Energy and the Grantham, Packard and Simons Foundations, she has led several large multidisciplinary projects to investigate the subsurface biosphere on Earth and the potential for similar life forms to exist elsewhere in the solar system.

At CU Boulder, Templeton trains students and postdoctoral scholars in the realms of geochemistry, geomicrobiology and astrobiology and co-directs the Raman Chemical Imaging laboratory, a CU-Boulder Core Facility. She is an active member of the geobiology program, and she teaches several courses in geochemistry that blend classroom learning with field experiences in the mountains of Colorado.

Templeton received her bachelor’s and master’s degrees from Dartmouth College, her PhD from Stanford University and her postdoctoral training from Scripps Institution of Oceanography.

About the distinguished research lectureship

The Distinguished Research Lectureship is one the highest honors bestowed by CU Boulder faculty upon a colleague. Awarded annually by the Research and Innovation Office, it recognizes tenured faculty members, research professors (associate or full) or adjunct professors who have been with CU Boulder for at least five years for a distinguished body of academic or creative work, as well as contributions to the educational and service missions. Each recipient gives a lecture in the fall or spring and receives a $2,000 honorarium.

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CU Boulder Professor Alexis Templeton will discuss hydrogen as a clean energy source and as an energy source for life in the Earth during her Nov. 20 Distinguished Research Lecture.

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Migration no guarantee of bird biodiversity

Rachel Sauer — Fri, 24 Oct 2025 01:11:14 +0000

Migration no guarantee of bird biodiversity Rachel Sauer Thu, 10/23/2025 - 19:11

Cody DeBos

CU Boulder researchers challenge long-held assumptions about the relationship between bird migration and the process by which new species arise

Every year, billions of birds take to the skies, riding thermal currents and navigating with an innate sense of direction across distances that would humble even the most accomplished commercial pilots.

“Migration is one of the most spectacular natural phenomena,” says Gina Calabrese, an evolutionary biologist and postdoctoral research fellow in the Safran Lab at the University of Colorado Boulder.

Gina Calabrese, an evolutionary biologist and postdoctoral research fellow in the Safran Lab at CU Boulder, and her research colleagues, tested the theory that bird migration may be a leading force behind the genesis of new species.

Aside from inspiring awe in bird enthusiasts, this ancient ritual has also sparked many scientific theories. One suggests that migration—by way of dividing populations across different routes and destinations—may be a leading force behind the genesis of new species.

“The idea that this behavior could be a major driver of biodiversity has been an attractive one,” Calabrese says.

But does it hold up under evolutionary scrutiny? That’s what she and a team of co-researchers set out to test in a new study published in Systematic Biology.

Rethinking migration and diversity

Calabrese and her colleagues’ research challenges long-held assumptions about the relationship between migration and speciation, or the process by which new species arise. While scientists have documented cases where migratory behavior appears to be splitting populations, her team wanted to know whether this pattern was widespread enough to have shaped bird diversity at a large scale.

“There’s a body of literature that suggests migration could promote the formation of new species, by isolating populations that use different migratory routes or wintering areas,” she explains. “If this were a widespread pattern, we might expect migratory lineages to be more diverse today than other non-migrating birds.”

To test the hypothesis, Calabrese and her collaborators examined evolutionary trees called phylogenies that map out how present-day bird species are related to one another. Drawing from massive data sets of two avian superfamilies, they used statistical models to estimate how quickly different bird lineages have diversified over evolutionary time. They then compared the rates of speciation in migratory birds to those that make a home in one location year-round.

The results weren’t what they had expected.

“We found no consistent evidence that migratory birds speciate faster than non-migratory ones,” Calabrese says. “This was a surprise—especially given how much attention the idea of migration-driven speciation has received.

“There are clear examples where migration is leading to population splits—those are real,” she says. “But those examples are often recent, and they might not always result in fully separate species.”

In other words, migration might occasionally set the stage for speciation, but it’s no guarantee.

“Not every population split leaves a lasting imprint in the fossil record or leads to a new species,” Calabrese adds.

“We found no consistent evidence that migratory birds speciate faster than non-migratory ones. This was a surprise—especially given how much attention the idea of migration-driven speciation has received," says CU Boulder researcher Gina Calabrese. (Photo: Todd Trapani/Unsplash)

One reason for this, she suggests, is that many observed migratory divides are evolutionarily young. These populations may just be starting to diverge, and many might merge again over time. Others may remain distinct but not reproductively isolated.

If the goal is to understand how biodiversity has accumulated over millions of years, a short-term snapshot—whether looking at bird lineages today or thousands of years ago—may not tell the full story.

“This is a good example of how something can be true in some cases but not necessarily explain large-scale patterns,” Calabrese says.

Following evidence, not expectations

Calabrese’s recent work is also a case study in scientific humility. When she and her colleagues first set out to test the migration-speciation connection, they weren’t looking to debunk anything. However, when the results started pointing in a different direction than their hypothesis, they remained committed to following the data.

“I think it’s important that we test assumptions—even appealing ones—with data,” Calabrese says.

The process also gave her a new perspective on how the scientific method plays out in real-world applications.

“I was a little anxious at first, until I kind of really felt like I had a handle on what my results were and felt confident in them. And then at that point, your job is just to tell the story of what your data show,” she adds.

While this study might have raised more questions than it answered, that’s part of what keeps Calabrese curious and driven to study the incredible phenomenon that is migration.

“It’s a little disappointing because you want to believe that what you’re studying today is explaining the answers to your bigger questions,” she says. “But it’s also cool because our findings mean that there’s still a lot to understand about how we get the diversity we see today and there’s still some mystery out there to solve, which is cool to me.”

CU Boulder Professor Rebecca Safran contributed to this research, as did Kira Delmore, Jochen Wolf and Daniel Rabosky.

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CU Boulder researchers challenge long-held assumptions about the relationship between bird migration and the process by which new species arise.

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Exploring Colorado’s untapped geothermal energy potential

Rachel Sauer — Wed, 22 Oct 2025 21:00:33 +0000

Exploring Colorado’s untapped geothermal energy potential Rachel Sauer Wed, 10/22/2025 - 15:00

A major question looms over Colorado’s energy future: Why does geothermal energy—a natural renewable resource—remain virtually untapped?

Assistant Teaching Professor Shae Frydenlund of the University of Colorado Boulder Center for Asian Studies, along with Professor Bri-Mathias Hodge of the Department of Electrical, Computer & Energy Engineering, will examine the technological and social barriers that have held back geothermal development in Colorado.

Learn more about this research

A major question looms over Colorado’s energy future: Why does geothermal energy—a natural renewable resource—remain virtually untapped?

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Research on python hearts has possible implications for human medicine

Rachel Sauer — Wed, 22 Oct 2025 20:30:32 +0000

Research on python hearts has possible implications for human medicine Rachel Sauer Wed, 10/22/2025 - 14:30

Blake Puscher

CU Boulder scientists discover the growth of new tissue in Burmese python hearts, which may be transferrable to mammals

Heart disease is the top cause of death in the United States, resulting in one in three deaths in 2023. In addition to being such a vital organ, the adult heart, unlike other parts of the body, cannot heal itself, only adapt to the damage caused by cardiac events like heart attacks.

In cases of minor injuries like skin wounds, damaged tissue grows back as the surrounding cells begin to replicate themselves and ultimately replace what was lost or damaged. Because cells in developed hearts cannot replicate, they must instead change in size and organization to adapt, but this process is itself pathological and will eventually lead to heart failure if the underlying issue is left untreated.

All of this is true in humans, but there are some examples of animals that can grow new heart cells even after the early stages of their development. Newts, zebrafish and spiny mice can all restart the mitotic reproduction of heart cells as adults in response to cardiac injury. In a previous study of hypertrophy—the process adult human hearts use to adapt to damage—in Burmese pythons, University of Colorado Boulder researchers discovered that the snakes’ heart cells can replicate themselves, too, under certain conditions.

CU Boulder postdoctoral researcher Yuxiao Tan and his research colleagues are studying the mechanism by which pythons' heart cells are enabled to replicate and how it could be transferred to mammals.

Yuxiao Tan, Thomas Martin, Angela Peter, Christopher Ozeroff, Christopher Ebmeier, Ryan Doptis, Brooke Harrison and Leslie Leinwand conducted a recently published follow-up study based on this information, not only discovering a fuller, dynamic model of how pythons grow after meals, but also the mechanism by which their heart cells are enabled to replicate and how it could be transferred to mammals. According to Tan, once this transferability is fully explored, it is possible that the process could be used to treat the tissue damage associated with heart disease.

Hyperplasia vs. hypertrophy

First, it’s important to understand the difference between the kind of growth that allows for regeneration and the kind of growth that normally occurs in the adult human heart. The first form of growth is called hyperplasia and the second is called hypertrophy.

“Hypertrophy means the cell is growing in size,” explains Tan, a postdoctoral researcher in the Leinwand Lab. “Hyperplasia means the cell is dividing, proliferating, so they are growing in numbers.” Hyperplasia happens because of a cellular process called mitosis, while hypertrophy happens because of an expansion in the volume and surface area of cells.

The human heart undergoes both hyperplasia and hypertrophy, but hyperplasia only happens during fetal development; after that, the heart can only grow when its cells increase in size. Both processes cause growth, but hyperplasia can be regenerative, and hypertrophy can be adaptive. Additionally, although hypertrophy is pathological in the context of cardiac injury, it can also be healthy or physiological, in which case it is reversible. The pythons in this study underwent physiological hypertrophy because no injuries were introduced to their hearts.

Growth after meals

Burmese pythons are predators that consume large prey infrequently, sometimes going months or even more than a year without feeding. When they are between meals, their metabolism is slowed to save energy, but once they begin digesting a large meal, it increases massively.

Correspondingly, the python’s organs, including the heart, grow, expanding by 20 to 40 percent over several days. This growth was generally understood to be driven by hypertrophy because the python’s organs return to their normal size almost as quickly as they grow—it is reversible, just like physiological cardiac hypertrophy in humans. However, the researchers discovered that, if fed enough, the python’s heart would not shrink all the way back to what its weight was before feeding.

“Their organs grow after a big meal,” Tan says, “but it’s very transient, very temporary. After one standard meal, if you look at other papers, the organ shrank back to its original size.” Depending on how much and how often the pythons ate, though, the results were different, as the researchers proved by assigning 24 pythons different feeding regimens and observing how those regimens affected them. The pythons were either “Fasted,” “Normal Fed,” “Frequent Fed” or “Frequent Fed/Fasted.”

Burmese pythons are predators that consume large prey infrequently, sometimes going months or even more than a year without feeding. (Photo: Wikimedia Commons)

“There were frequent feeding regimens, which means we fed them every four days, and they usually average 28 days between meals,” Tan explains. As expected, the Fasted pythons grew the least while the Normal Fed animals grew a bit more and Frequent Fed and Frequent Fed/Fasted pythons grew massively. Meanwhile, although the Frequent Fed and Frequent Fed/Fasted pythons were fed the same amount for eight weeks, the fact that the latter was not fed for four weeks after led to unique results.

While the Frequent Fed/Fasted pythons’ body weight and major organ masses (such as those of the kidney and liver) decreased once they were no longer able to eat so often, the total weight of their hearts remained elevated. This indicates that, while heart growth in Burmese pythons is normally caused by hypertrophy, when they can eat often enough, a different kind of cellular signaling occurs in the heart, and hypertrophic growth is locked in through hyperplasia. So, under the right circumstances, both methods of growth occur, with hypertrophic growth preceding hyperplastic growth.

“It’s a hybrid model,” Tan says. “In the past, we only considered hypertrophy, but in my study, hypertrophy happens first, and then it’s quickly followed up by the hyperplastic process.” Tan says that hyperplasia comes with de-differentiation in this case: The cells that are able to multiply lose their adult functionality during the process.

“During hypertrophy, they don’t want proliferation yet, because cells will de-differentiate and lose contractility. That’s why, at the early stage, when they need the heart to perform, it’s just hypertrophy, but once they complete most of the process, the heart can take a short break, so the cells can divide as well. I propose that’s why hypertrophy happens first.”

Differential gene expression

This leaves an important question: How do Burmese python hearts undergo hyperplasia when adult hearts, including those of these pythons, aren’t normally able to? The answer has to do with the way that genes are expressed by heart cells.

In a previous CU Boulder study, researchers showed that the plasma of fed Burmese pythons promoted healthy cardiac hypertrophy in mammals. (Photo: Wikimedia Commons)

Heart cells are capable of hyperplastic growth in principle—they do it during fetal development to form the basic structure of the adult heart. However, after that early stage of development, the heart changes in many ways, including its cells becoming unable to replicate. These two forms of behavior, or differential expressions of the genes, occur because some of the cells’ genes are inactivated after early development.

The genome is like a set of instructions or code that determines how cells behave, with individual genes being like one item in a list of instructions or a line of code. When a gene is inactivated, it is like an item being crossed out or a line of code being commented out: The information isn’t lost, but the way it is annotated tells cells not to follow that part of the instructions or execute that code. Still, something that is crossed out can be rewritten, or something commented out can be uncommented, and this is true for genes as well; a gene that is inactivated can be reactivated.

“You have genes involved in mitotic pathways,” Tan says, “and when they get activated, that will send cells into a mitotic stage, so the cells will prepare themselves for division.” This differential expression is studied through gene set enrichment analysis. “Enrichment simply means these genes in a cluster of genes are activated at the same time,” Tan explains.

Aside from the masses of Frequent Fed pythons’ hearts remaining elevated, the researchers know that mitosis is happening in the animals’ hearts because they observed signals associated with cellular reproduction and because the process was captured with 3D imaging.

“First of all, you see green, because the pHH3 protein is activated, and that means cells are in the mitotic stage,” Tan explains. “For a non-dividing cell, you wouldn’t see anything. Then the figure shows a cell with two nuclei. Everything has one nucleus, but in that cell, there are two, and they’re pulling apart.” This describes the process of mitosis, where the cell duplicates its DNA in its nucleus, the barrier between the nucleus and the rest of the cell breaks down, and the two nuclei—or sets of nucleus content, which will soon become distinct nuclei—are separated into their own cells.

Implications and future research

Although the researchers have good evidence that something in Frequent Fed pythons’ bodies is triggering hyperplastic growth in their hearts, what it is exactly remains unknown. Tan says that the growth was likely triggered by circulating factors in the pythons’ blood plasma. In an earlier study, the researchers showed that the plasma of fed Burmese pythons promoted healthy cardiac hypertrophy in mammals. Along the same lines, the plasma of fed pythons, and especially that of Frequent Fed pythons, activated hyperplasia.

Could pythons' wild feeding habits inspire new treatments for human heart disease?

“The python plasma started the cell cycle again, so that means there’s something there,” Tan says. “You can translate the snake biology to mammals, because the protein activated mammal cells. It’s hard to say if we could use this for drug development, but that’s provisioned here. You identify the factor, synthesize it, and use that. I think it has the potential to be something, but we just don’t know yet.”

A medicine that can regenerate people’s hearts sounds like it would change the world, but because this study did not involve Burmese pythons with injured hearts, we don’t even know how much they could recover using this process yet, much less how well it would work in humans.

“Once people get a heart attack,” Tan says, “the injuries have already happened, and some cells have died already, which will affect your heart function. You can’t just fully recover and get rid of the scar, but at least if the heart cells are able to grow back, even just a little, that’s going to help your overall cardiac function.”

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CU Boulder scientists discover the growth of new tissue in Burmese python hearts, which may be transferrable to mammals.

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New learning center more than just a place to study math

Rachel Sauer — Mon, 20 Oct 2025 21:30:48 +0000

New learning center more than just a place to study math Rachel Sauer Mon, 10/20/2025 - 15:30

Rachel Sauer

The Applied Mathematics Community and Learning Center, opened last month after a summer-long renovation, invites students to collaborate, hang out and learn

In one corner of the common room, Ben Sewald is writing an equation on a whiteboard. A first-year University of Colorado Boulder student, he’s still deciding whether to major in aerospace engineering or applied mathematics but knows one thing for sure: Discrete math is his favorite class.

“The whole time before this, I’ve been learning math, but in this class it’s about how we can prove that these things are true,” he explains as he writes.

Ben Sewald, a first-year CU Boulder student, writes an equation for his discrete math class in the Applied Mathematics Community and Learning Center. (Photo: Rachel Sauer)

Not far from him, but on a different whiteboard, Atticus Fretz, a sophomore studying environmental engineering, is tutoring two Calculus I students, pointing with a blue marker to explain each part of the equation as he writes it.

And through the rest of the common area—and in the three classrooms arrayed from it—the hum of applied mathematics hovers around students solo studying or clustered in groups; around tutors explaining the finer points of differential equations, algorithms and data structures and every level of calculus; and around faculty members expanding on what they taught in class—but from the comfort of a lounge chair.

It’s the middle of a Thursday afternoon, and the Applied Mathematics Community and Learning Center (CALC) is hopping.

Opened last month after a summer-long, $1.7 million renovation of a section of a classroom wing in the University of Colorado Boulder Engineering Center, CALC is designed to be “a warm, inviting space for undergraduate students, especially engineering calculus students, to learn, hang out and work on their coursework,” explains Mark Hoefer, professor and department chair of applied mathematics.

The space, in ECCR 252, formerly was a computer lab, “but it wasn’t heavily used,” says Silva Chang, a full teaching professor of applied mathematics. “So, we started talking about creating a comfortable, welcoming place where students could feel at home and hang out with their friends while they study and learn.”

When it was a little-used computer lab, the space was darker and not especially comfortable, so the renovation included jackhammering through concrete walls and replacing them with glass to allow in natural light, painting the walls in lighter colors, replacing carpeting and lighting and arranging comfortable chairs and benches around the space.

“We want this to be a space that supports collaboration,” Chang says.

CALC will become a home to all-day drop-in office hours with faculty members and teaching assistants; tutoring with applied mathematics-trained tutors; small, learning assistant–led study groups; workshops on study strategies; and proactive student outreach, Hoefer says. Further, faculty and staff will continually work with students to assess how they’re using the space and what would improve or enhance their experiences in it.

“I think people are slowly discovering this space,” Silva says, gesturing to students grouped around tables and in comfortable chairs or writing on whiteboards. “It’s especially important for first-year students to have a place where they can find mentors and connect with classmates; those things are so important for student retention, so they can feel that this is a place where they belong.”

For Maxwell Minson, a first-year student studying bioengineering and, on this particular afternoon, writing Calculus 3 equations on a whiteboard, CALC is a place where “I feel really comfortable,” he says. “I’m here all the time.”

Atticus Fretz (kneeling, wearing purple hoodie), a sophomore majoring in environmental engineering, tutors Calculus 1 in the Applied Mathematics Community and Learning Center. (Photo: Rachel Sauer)

The Applied Mathematics Community and Learning Center offers drop-in hours with faculty members and teaching assistants as well as tutoring with applied mathematics-trained tutors. (Photo: Rachel Sauer)

Renovation of a little-used computer lab in the CU Boulder Engineering Center included replacing concrete walls with glass ones to let in more light, including one etched with the Department of Applied Mathematics logo. (Photo: Rachel Sauer)

Elizabeth Wallis McGuire (crouched, pointing at whiteboard), a junior studying electrical and computer engineering, tutors Calculus 1 in the Applied Mathematics Community and Learning Center. (Photo: Rachel Sauer)

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The Applied Mathematics Community and Learning Center, opened last month after a summer-long renovation, invites students to collaborate, hang out and learn.

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