Division of Natural Sciences

Detecting cognitive decline before its symptoms start

Rachel Sauer — Wed, 13 Nov 2024 20:24:58 +0000

Detecting cognitive decline before its symptoms start Rachel Sauer Wed, 11/13/2024 - 13:24

Daniel Long

In his research on the brain, Daniel Gustavson looks for clues about when cognitive decline begins

According to Daniel Gustavson, assistant research professor in the Institute for Behavioral Genetics, much of the research on cognitive decline starts late.

“A lot of studies of older adults—too many, in my opinion—focus on when some cognitive decline has already happened,” he says. “It's clear that a lot of the disease, or even just normal aging, has already taken place by the time somebody comes into a clinic and says, ‘I'm worried about my brain.’”

Gustavson wants to dig deeper into the timeline and see if cognitive decline can be spotted before its telltale signs arise. A paper he coauthored and recently published in Neurobiology of Aging makes headway toward accomplishing that goal.

��񱦵� researcher Daniel Gustavson notes that a lot of cognitive decline, or even just normal aging, has already taken place by the time "somebody comes into a clinic and says, ‘I'm worried about my brain.’”

The cognitive gas tank

Gustavson’s study—which used twin research, genetic analysis and magnetic resonance imaging (MRIs), among other methodologies—examines the relationship between brain reserve in middle age and executive function later in life.

“Brain reserve,” says Gustavson, “is a bit like a gas tank. You have a certain amount of gas built up when you’re a young adult, when your brain is at its healthiest, and as you age, you start to lose some of that fuel.”

Executive function, he adds, refers to complex goal management or attentional control. “It captures higher-level cognitive processes, where you have to be controlling other sub-processes.”

An example of executive function in action is asking someone to memorize and reorder a string of letters and numbers.

“You might have people listen to a list like X, six, B, Y, seven, J, and then they’d have to remember that list in their head and repeat the numbers back in numerical order and the letters in alphabetical order,” Gustavson says. “It’s a little more complicated than just repeating what someone said.”

Using data from the Vietnam Era Twin Study of Aging (VETSA), which includes more than 1,600 subjects who have undergone various cognitive assessments at regular intervals over the past 20 years, Gustavson and his coauthors concluded that higher brain reserve at the age of 56 was associated with better executive function at the age of 68.

Looks can be revealing

Brain reserve, says Gustavson, is a proxy for brain thickness, and brain thickness is determined through MRIs.

To analyze the hundreds of MRIs of VETSA subjects, Gustavson and his coauthors used a machine-learning algorithm developed by James H. Cole, professor of neuroimage computing at the MANIFOLD Lab, which was trained in much the same way Google trains its search algorithms.

“You can train it over and over again,” Gustavson says. “The more data you have”—that is, MRIs—“and the more times you tell it, ‘You were wrong this time. You were right this time,’ the better it gets at classifying this brain as one age versus that brain as another age.”

The algorithm assesses plump, padded brains as younger and atrophied, motheaten brains as older, regardless of the chronological age of the people in whose heads those brains reside. That means, for example, that a 56-year-old can have a brain that appears 60 and a 60-year-old can have a brain that appears 56.

And this matters, Gustavson says, because how a brain looks in an MRI predicts its executive function years later.

“Controlling for their actual age, people with younger-looking brains had much shallower decline in executive function over the subsequent 12 years, and people whose brains appeared older than average had steeper drops in executive function.”

Yet the cause of this discrepancy—genetics? environment? trauma?—is something the algorithm alone can’t explain. That’s where twin research comes in.

Same genes, different story

One of the benefits of twin studies like VETSA, Gustavson says, is their ability to separate environmental influences on a person’s health—things like diet, exercise and place of residence—from genetic influences.

“Brain reserve is a bit like a gas tank. You have a certain amount of gas built up when you’re a young adult, when your brain is at its healthiest, and as you age, you start to lose some of that fuel,” says Daniel Gustavson. (Illustration: iStock)

“Those two things aren't fully separable, but basic twin studies give us some idea of how inherited different constructs are—not only cognitive abilities, like memory or speed, but also changes in those abilities. Twin studies help us quantify how much those changes are due to genetics and how much are due to environment.”

If one twin experiences cognitive decline faster than the other, in other words, researchers can confidently point to environment as the reason, since twins share the same genes.

But twin studies can go only so far, Gustavson says, as they tend to paint with a broad brush. “You often can't pinpoint specific genes or specific environments that matter, because it's all statistical.”

That’s why Gustavson and his team incorporated genetic analyses in their study. They wanted a higher-resolution snapshot of the genetic influences on cognitive decline, specifically by seeing if the APOE genotype, which is strongly associated with Alzheimer’s, predicted a drop in executive function.

What they found is that, although APOE alone did not fully explain changes in subjects’ executive function over time, those subjects’ genes taken as a whole did.

“Most of the association between people's brain health and their future cognitive decline, about two-thirds, was explained by genetics,” Gustavson says.

But that’s not to dismiss the other third as inconsequential.

“Things like healthy lifestyle, diet, smoking and alcohol use, social engagement—those things don't seem like they relate to cognitive changes, but they might impact your brain health in the first half of your life, and then your brain health in midlife will impact your cognition later,” says Gustavson.

The fourth wave

Gustavson and his fellow researchers just completed the fourth wave of data collection, when the VETSA subjects were 74 years old, and are therefore currently working to build upon their findings.

“We would like to expand our models to capture the cognitive changes even further out,” he says.

Gustavson would also like to deepen his understanding of what exactly the brain-age algorithm is detecting. “Is it capturing something new to midlife, or is it capturing something from young adulthood, the consequences of which are only becoming apparent in midlife?”

He suspects it’s the latter, but he’s not yet sure. “I really want to look at that in more detail.”

Jeremy A. Elman, Chandra A. Reynolds, Lisa T. Eyler, Christine Fennema-Notestine, Olivia K. Puckett, Matthew S. Panizzon, Nathan A. Gillespie, Michael C. Neale, Michael J. Lyons, Carol E. Franz and William S. Kremen contributed to this research.

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In his research on the brain, Daniel Gustavson looks for clues about when cognitive decline begins.

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Top illustration: iStock

Life endured inside the snowball

Rachel Sauer — Wed, 13 Nov 2024 18:31:15 +0000

Life endured inside the snowball Rachel Sauer Wed, 11/13/2024 - 11:31

Liam Courtney-Davies , Rebecca Flowers and Christine Siddoway

Evidence from Snowball Earth found in ancient rocks on Colorado’s Pikes Peak—it’s a missing link

Around 700 million years ago, the Earth cooled so much that scientists believe massive ice sheets encased the entire planet like a giant snowball. This global deep freeze, known as Snowball Earth, endured for tens of millions of years.

Yet, miraculously, early life not only held on, but thrived. When the ice melted and the ground thawed, complex multicellular life emerged, eventually leading to life-forms we recognize today.

��񱦵� researchers Liam Courtney-Davies (left) and Rebecca Flowers (right), along with Colorado College colleague Christine Siddoway, have found that life endured during Snowball Earth.

The Snowball Earth hypothesis has been largely based on evidence from sedimentary rocks exposed in areas that once were along coastlines and shallow seas, as well as climate modeling. Physical evidence that ice sheets covered the interior of continents in warm equatorial regions had eluded scientists – until now.

In new research published in the Proceedings of the National Academy of Sciences, our team of geologists describes the missing link, found in an unusual pebbly sandstone encapsulated within the granite that forms Colorado’s Pikes Peak.

Solving a Snowball Earth mystery on a mountain

Pikes Peak, originally named Tavá Kaa-vi by the Ute people, lends its ancestral name, Tava, to these notable rocks. They are composed of solidified sand injectites, which formed in a similar manner to a medical injection when sand-rich fluid was forced into underlying rock.

A possible explanation for what created these enigmatic sandstones is the immense pressure of an overlying Snowball Earth ice sheet forcing sediment mixed with meltwater into weakened rock below.

An obstacle for testing this idea, however, has been the lack of an age for the rocks to reveal when the right geological circumstances existed for sand injection.

We found a way to solve that mystery, using veins of iron found alongside the Tava injectites, near Pikes Peak and elsewhere in Colorado.

Earth was covered in ice during the Cryogenian Period, but life on the planet survived. (Illustration: NASA)

Iron minerals contain very low amounts of naturally occurring radioactive elements, including uranium, which slowly decays to the element lead at a known rate. Recent advancements in laser-based radiometric dating allowed us to measure the ratio of uranium to lead isotopes in the iron oxide mineral hematite to reveal how long ago the individual crystals formed.

The iron veins appear to have formed both before and after the sand was injected into the Colorado bedrock: We found veins of hematite and quartz that both cut through Tava dikes and were crosscut by Tava dikes. That allowed us to figure out an age bracket for the sand injectites, which must have formed between 690 million and 660 million years ago.

So, what happened?

The time frame means these sandstones formed during the Cryogenian Period, from 720 million to 635 million years ago. The name is derived from “cold birth” in ancient Greek and is synonymous with climate upheaval and disruption of life on our planet – including Snowball Earth.

While the triggers for the extreme cold at that time are debated, prevailing theories involve changes in tectonic plate activity, including the release of particles into the atmosphere that reflected sunlight away from Earth. Eventually, a buildup of carbon dioxide from volcanic outgassing may have warmed the planet again.

The Tava found on Pikes Peak would have formed close to the equator within the heart of an ancient continent named Laurentia, which gradually over time and long tectonic cycles moved into its current northerly position in North America today.

Dark red to purple bands of Tava sandstone dissect pink and white granite. (Photo: Liam Courtney-Davies)

The origin of Tava rocks has been debated for over 125 years, but the new technology allowed us to conclusively link them to the Cryogenian Snowball Earth period for the first time.

The scenario we envision for how the sand injection happened looks something like this:

A giant ice sheet with areas of geothermal heating at its base produced meltwater, which mixed with quartz-rich sediment below. The weight of the ice sheet created immense pressures that forced this sandy fluid into bedrock that had already been weakened over millions of years. Similar to fracking for natural gas or oil today, the pressure cracked the rocks and pushed the sandy meltwater in, eventually creating the injectites we see today.

Clues to another geologic puzzle

Not only do the new findings further cement the global Snowball Earth hypothesis, but the presence of Tava injectites within weak, fractured rocks once overridden by ice sheets provides clues about other geologic phenomena.

Time gaps in the rock record created through erosion and referred to as unconformities can be seen today across the United States, most famously at the Grand Canyon, where in places, over a billion years of time is missing. Unconformities occur when a sustained period of erosion removes and prevents newer layers of rock from forming, leaving an unconformable contact.

Our results support that a Great Unconformity near Pikes Peak must have been formed prior to Cryogenian Snowball Earth. That’s at odds with hypotheses that attribute the formation of the Great Unconformity to large-scale erosion by Snowball Earth ice sheets themselves.

We hope the secrets of these elusive Cryogenian rocks in Colorado will lead to the discovery of further terrestrial records of Snowball Earth. Such findings can help develop a clearer picture of our planet during climate extremes and the processes that led to the habitable planet we live on today.

Liam Courtney-Davies is a postdoctoral associate in the Department of Geological Sciences at the ��񱦵�; Rebecca Flowers is a ��񱦵� professor of geological sciences. Christine Siddoway is a professor of geology at Colorado College.

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Evidence from Snowball Earth found in ancient rocks on Colorado’s Pikes Peak—it’s a missing link.

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Fish on film: uncovering the environmental drivers of black spot syndrome

Rachel Sauer — Tue, 12 Nov 2024 17:18:32 +0000

Fish on film: uncovering the environmental drivers of black spot syndrome Rachel Sauer Tue, 11/12/2024 - 10:18

Blake Puscher

��񱦵� researchers use a unique, noninvasive method to determine the environmental factors contributing to several symptoms among tropical fish

For many researchers in biology and other natural sciences, dissecting specimens may not be desirable, though it is often necessary. This is because dissection means killing the animal a researcher is trying to study—a big issue, especially if the species is experiencing population decline.

Over time, such concerns have led scientists to develop a number of non-invasive techniques, including video transects. This is a type of video recording used in marine biology, in which divers film along a line of fixed length and depth to record images for computer-assisted analysis, obtain permanent data that can be reassessed later and survey wider areas in shorter amounts of time.

��񱦵� scientist Pieter Johnson and his research colleagues use a unique, noninvasive method to determine the environmental factors contributing to several symptoms among tropical fish.

A recently published study by Pieter Johnson, a ��񱦵� professor of distinction in the Department of Ecology and Evolutionary Biology, and lead author Cheyenna de Wit of the University of Amsterdam, demonstrates the benefits of recording rather than dissecting specimens.

In their paper on black spot syndrome in ocean surgeonfish, the researchers use video transects to measure the severity of the disease among thousands of fish and identify the environmental factors contributing to its distribution.

What is black spot syndrome?

Black spot syndrome is a collection of several symptoms, the most prominent being the dermal lesions or spots for which the condition is named, according to Johnson. In many species, Johnson says, these lesions are black, “but in some species they’ll show up as white.” They form on the skin, scales and fins of fish.

The spots appear when the free-swimming, larval form of trematodes—commonly known as flukes, a type of parasitic flatworm—penetrate the skin of the fish and form cysts inside them. The distinctive coloration occurs when fish surround the cyst with melanin in response to the invasion, similar to the formation of pearls in oysters.

Relatively little is known about the genus of trematode that causes black spot syndrome, Scaphanocephalus. “Prior to us detecting it in 2017,” Johnson says, “it had never been reported from Caribbean fish. So, it was wholly undescribed from that area.” Much remains unknown about this trematode, including the type of snail that Scaphanocephalus infects before moving on to fish.

However, trematode infection is clearly very common in certain regions: In Johnson’s study, 70% of observed fish showed signs of infection, while a companion study of other Caribbean fish demonstrated both how high the parasite loads are in that region, and how many different fish species seem to be affected, according to Johnson.

As to the consequences of infection for fish, there is some evidence, Johnson says, that infected fish may graze less and have more trouble maintaining buoyancy. Researchers also hypothesize that they are more conspicuous to predators.

“One in particular, of course, is osprey, which are visual, fish-specialized predators that are looking for fish through the water,” Johnson says. “When these infected fish tend to flash or turn sideways, and you can see those black spots, it probably makes it a lot easier for the bird to detect them.”

If this hypothesis is true, black spot syndrome could bolster the numbers of the trematodes that cause it, as Johnson says osprey are their definitive host. That means these trematodes must enter the body of an osprey to reproduce. The transmission of the parasites is trophic, so they are passed along when infected fish are eaten.

Noninvasive methods

While black spot syndrome can have negative effects on infected fish, the most important consequences could be for reef ecosystems. According to Johnson, black spot syndrome has been increasingly prevalent in important herbivorous grazing fish in the Caribbean, such as surgeonfish and parrotfish.

Learn more

For more information on the complex lifecycles of digenetic trematodes, see this article about other research from CU involving the parasites.

“In tropical coral reef ecosystems,” Johnson explains, “surgeonfish and parrotfish, and other herbivores play a key role by grazing on algae.” Since infected fish are evidenced to graze less, and since they may be more likely to be eaten by osprey, the population of algae in the affected area can increase.

“Algae and coral are in a dynamic balance,” Johnson says, and if there is enough algal growth, “it can start to overwhelm and kill corals. So, in these areas, we try to keep those populations of surgeonfish and parrotfish as viable as possible, so that they can continue to regulate and graze down the algae.”

In fact, some studies have even said that grazing fish can help save coral reefs, with particular emphasis on parrotfish because the prior primary grazer in the Caribbean, spiny sea urchins, were killed off by disease in the 1980s. Also, trematode infection isn’t the only thing threatening surgeonfish and parrotfish populations, as they are popular catches for fisheries.

Because the fish being studied are ecologically important, it is particularly important to avoid interfering with their populations. Ordinarily, this is difficult, since dissection is the surest way to confirm a trematode infection—the parasites being clearly visible inside the fish’s bodies. In this case, though, the black spots characteristic of black spot syndrome allowed for a different approach: the video transect method.

To record as many surgeonfish as possible, and therefore provide an accurate estimate of how many fish were infected, SCUBA divers filmed at 35 sites along the coast of Curaçao, an island in the southern Caribbean. They recorded two and five meters below water for either 10 minutes or until 20 adult surgeonfish had been filmed.

An ocean surgeonfish with black spot syndrome. (Photo: Cheyenna de Wit)

Environmental factors

Besides determining that 70% of surgeonfish showed visible signs of black spot syndrome, Johnson and de Witt correlated different environmental factors with the severity of the syndrome, which they based on the average number of spots per fish.

One of the most significant effects the researchers observed arose from longitude—that is, the position of fish from east to west along the leeward (downwind) shore. Both the prevalence and intensity of black spot syndrome was lower toward the east and higher toward the west.

Johnson hypothesizes that this effect is caused by urban and industrial development, as the east end of Curaçao, where a portion of the research took place, is privately owned and less developed. The researchers observed the same association between development and infection intensity in Bonaire, the neighboring island.

The first component of the effect was wave intensity, which was negatively associated with infection intensity because the larval form of trematode that infects fish can’t swim well enough to overcome opposing tides. Wave energy is usually greatest at the eastern end of Curaçao, so this will have contributed to the lower intensity of infection at the east end.

The other components were positively associated with infection intensity. Nitrogen concentration increases with sewage and domestic runoff, which can contain nutrients and other pollutants. Nutrients can increase the population of trematode hosts, and pollutants can weaken the immune systems of fish that trematodes infect.

While fishing pressure can be either positively or negatively correlated with parasite abundance, Johnson says, this depends on the species involved. In the case of Scaphanocephalus, fishing pressure could increase abundance if it removed predatory fish from the environment, resulting in an increased snail population.

Student learning

��񱦵� students also play an important role in this research. Undergraduates in the field course Coral Reef Ecology and Conservation (EBIO 4090, taught by Johnson) spend their fall semester learning about coral reefs and the factors that threaten them before traveling to Curaçao over winter break. During a week-long SCUBA expedition, students learn how to collect video transect data using the same methods Johnson and his research colleagues use and are contributing valuable data to the understanding of black spot syndrome. For the upcoming trip, students will be revisiting some of the same sites as in the study to assess how black spot severity has changed through time, particularly following recent warm water bleaching events that have killed many corals.

Since most of the factors composing the difference between the east and west ends come from human action, it is possible that the severity of black spot syndrome could be significantly reduced if the handling of runoff and/or fishing behavior were changed.

A unique methodology

One noteworthy part of the way Johnson and de Witt’s study was conducted is that, with the videos collected, the researchers had observers record the number of lesions on each fish. This is unique, as prior studies have simply noted whether lesions were present, leaving the severity of infection uncertain.

Moreover, methods like the one used in this study may help to solve the challenges that come with observing ocean life. “There's a lot of ocean out there and not a tremendous number of people to study it,” Johnson explains, “so I think approaches like this could be applied in other areas where we're detecting blackspot syndrome.” Photos are an especially useful way to study the ocean because they are easy for anyone to take thanks to digital technology, he adds. For this reason, community science platforms like iNaturalist can be used to aggregate a large amount of data.

“When people are on vacation, or they’re diving, or they’re swimming,” Johnson says, “they upload all of their observations and fish photos, and we’ve been using that to scan across large sections of the Caribbean and lots of different fish species; and now some of the undergrads in the lab are also extending that to look into parts of the Indo-Pacific and other regions of the world where Scaphanocephalus occurs.

“So, I think those kinds of approaches, video transects and these community science-uploaded images, together start to give a much bigger picture of patterns of infection over large geographic areas.”

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An ocean surgeonfish with black spot syndrome. (Photo: Cheyenna de Wit)

World War II vet, CU prof joins event marking end of that war

Rachel Sauer — Fri, 08 Nov 2024 15:17:11 +0000

World War II vet, CU prof joins event marking end of that war Rachel Sauer Fri, 11/08/2024 - 08:17

Clint Talbott

Richard Jessor, ��񱦵� professor emeritus, to join Miami’s New World Symphony this weekend to be interviewed by historian James Holland

Next spring marks the 80^th anniversary of the end of World War II and the Holocaust, and Miami Beach’s New World Symphony is performing two concerts this weekend that will feature pre-concert interviews with Richard Jessor, a ��񱦵� professor emeritus of behavioral science who fought with the U.S. Marines on the island of Iwo Jima.

Conductor Lidiya Yankovskaya and best-selling historian James Holland will team up for a commemorative concert honoring veterans and the “global sounds of resilience.”

The symphony characterized the event this way: “From the beaches of Normandy and Iwo Jima to the skies of the Tuskegee Airmen, explore the global fight for democracy through music that commemorates and reflects. Soprano Emily Magee makes her NWS debut in the pensive and poignant Four Last Songs.”

In pre-concert appearances on Saturday, Nov. 9, and Sunday, Nov. 10, Holland will interview Jessor about his experiences in the war.

Jessor, who will turn 100 this month, said the attempt to use music to illuminate “such deeply disturbing human experiences as war and the Holocaust is, to my mind, an admirable enterprise deserving support.”

Additionally, he said, the event should underscore the need for societies to do everything possible to avoid such calamities in the future. “And finally, perhaps, as one of the diminishing cohort of WWII combat veterans still alive, I feel a continuing responsibility to be a voice against the madness of wars.”

Jessor noted that the senior vice president for artistic planning and programs of the New World Symphony is Martin Sher, son of Boyce Sher and Daniel Sher, dean emeritus of ��񱦵�’s College of Music.

Jessor met Martin Sher in July when he was visiting his parents in Boulder. At that meeting, Sher discussed his plan to devote the 2024-25 programs to commemorating the end of World War II and the Holocaust, and he wanted to present music that would provide an interesting and inspirational commentary.

Examples include Shostakovich’s Leningrad Symphony, written when the city was under siege, and the music for the film Saving Private Ryan, written by John Williams. Sher also wanted to learn more about Jessor’s combat experience as a Marine in the battle for Iwo Jima.

At the time, Sher was consulting with Holland, and Holland interviewed Jessor via Zoom on his blog. Later, Sher conceived the idea of the pre-concert interviews and asked Jessor to have those conversations with Holland in person. “Of course, I agreed,” Jessor said.

This weekend’s Veterans Day concerts are free to veterans. Saturday’s concert is available to stream live and will be available online after the performance. The streaming option is free to anyone with an email address who registers at this link. The full concert program is at this link.

Jessor’s pre-concert interview will not be streamed, however.

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Richard Jessor, ��񱦵� professor emeritus, to join Miami’s New World Symphony this weekend to be interviewed by historian James Holland.

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Above: Richard Jessor at his home in Boulder. ��񱦵� photo by Glenn Asakawa.

Andrés Montoya-Castillo earns 2024 Packard Fellowship for Science and Engineering

Anonymous — Tue, 22 Oct 2024 13:43:24 +0000

Andrés Montoya-Castillo earns 2024 Packard Fellowship for Science and Engineering Anonymous (not verified) Tue, 10/22/2024 - 07:43

��񱦵� chemist will use the five-year support to study tailoring cycles affecting energy flow in solar energy conversion

Andrés Montoya-Castillo, an assistant professor in the ��񱦵� Department of Chemistry, has been awarded a 2024 Packard Fellowship for Science and Engineering.

The fellowships, given by the David and Lucille Packard Foundation, are awarded to innovative early-career scientists and engineers, who receive $875,000 over five years to pursue their research.

“These scientists and engineers are the architects of tomorrow, leading innovation with bold ideas and unyielding determination,” said Nancy Lindborg, president and chief executive officer of the Packard Foundation, in announcing the 2024 awards. “Their work today will be the foundation for the breakthroughs of the future, inspiring the next wave of discovery and invention.”

Montoya-Castillo is a theoretical chemist who leads a lab that encompasses multidisciplinary skills spanning physical chemistry, condensed matter physics and quantum information science.

Explaining his research that the fellowship will support, Montoya-Castillo notes, “The world’s growing population faces looming food shortages and the pressing need for cheap and sustainable energy sources. Reliable conversion of sunlight–our most abundant energy source–into fuel can address these threats. However, reliable energy conversion requires knowing how to tailor, at an atomic level, photoprotection cycles limiting food production and energy flow in solar cells that convert sunlight into fuel.”

He adds that he “will harness the power of generalized master equations to develop efficient, atomically resolved theories and analysis tools that cut the cost of experiments needed to reveal how to employ chemical modifications to manipulate photoprotection cycles in plants and the photocatalytic activity of metal oxides. Our developments will offer transformative insights into fundamental excitation dynamics in complex materials, enabling the boosting of photosynthetic crop production and optimization of environmentally friendly semiconductors that split water into clean fuels.”

Last year, Montoya-Castillo was named a U.S. Department of Energy Early Career Research Program scientist and earlier this year received the ��񱦵� Marinus Smith Award, which recognizes faculty and staff members who have had a particularly positive impact on students. He received his BA in chemistry and literature from Macaulay Honors College, CUNY, and his PhD in chemical physics from Columbia University.

“I’m honored and thrilled to be part of the Packard Fellows class of 2024!” Montoya-Castillo says. “With the help of the Packard Foundation's funding, I look forward to finding new ways to measure and control nonequilibrium energy flow for human use.”

[video:https://www.youtube.com/watch?v=W3RtY7QKzxU&t=6s]

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ADHD and reading disability often occur together, study finds

Anonymous — Thu, 17 Oct 2024 14:56:38 +0000

ADHD and reading disability often occur together, study finds Anonymous (not verified) Thu, 10/17/2024 - 08:56

Daniel Long

It’s surprisingly common for children to have both conditions, ��񱦵� researcher Erik Willcutt argues in a recently published paper

According to a paper coauthored by Erik Willcutt, professor of psychology and neuroscience at the ��񱦵� and faculty fellow of the Institute for Behavioral Genetics, many children with attention-deficit/hyperactivity disorder (ADHD) also have reading disability, and vice versa.

“A lot of kids tend to have both learning and attentional difficulties,” says Willcutt, a clinical child psychologist by training. “Similarly, many children with reading disability also experience broader learning difficulties in areas such as math and writing.”

This research marks a shift in the clinical understanding of learning disabilities.

In recently published research, Erik Willcutt, a ��񱦵� professor of psychology and neuroscience, finds that many children with attention-deficit/hyperactivity disorder also have reading disability, and vice versa.

“Twenty-five years ago, we all went into an assessment with a child thinking we had to figure out what the diagnosis is.”

“The” diagnosis—singular.

“Back then, it was always kind of surprising if a child met criteria for more than one diagnosis. We’d think, ‘Maybe we’re just wrong, and we’ve got to figure out which diagnosis is correct.’”

Yet, as research has progressed, this either-or thinking has transformed into something more like both-and thinking.

“We’ve realized over time, there are a lot of kids that really do seem to have more than one diagnosis, and that in many cases both diagnoses would benefit from treatment.”

When one diagnosis complicates another

The phenomenon of multiple diagnoses for one person is called comorbidity, a term “that came out of classic medical literature where people could have more than one illness at the same time,” says Willcutt. “For example, heart disease frequently co-occurs with other physical conditions such as diabetes, and this may mean that treatment of the heart disease is complicated by the diabetes or another co-occurring illness.”

It’s the same idea with reading disability and ADHD. “That comorbidity suggests that a child's difficulties extend beyond what they would be if that child had just reading disability.”

Reading disability, Willcutt points out, doesn’t simply mean difficulty reading. It means unexpected difficulty reading, with the expectations being based on a child’s education.

So, a child who struggles to read but hasn’t had an adequate reading education may not have reading disability. Perhaps that student struggles because he or she hasn’t grown up around books, or hasn’t been read to, or hasn’t been given adequate reading instruction. For a student such as this, difficulty reading may not be a disability so much as the natural consequence of a less-enriched reading environment.

It's the children who have had an adequate education and still underachieve in reading who may have reading disability. And if those kids also happen to have ADHD, their reading disability will likely be harder to manage, just as heart disease becomes more challenging for someone who also has diabetes.

“Individuals with more than one disorder often differ in important ways from individuals with a disorder in isolation, with the comorbid group frequently experiencing greater symptom severity, more extensive and severe functional and neurocognitive impairment, and poorer long-term outcomes,” Willcutt and co-author Stephen A. Petrill state in their paper.

Externalizing and internalizing behaviors

Researcher Erik Willcutt notes that reading disability doesn’t simply mean difficulty reading. It means unexpected difficulty reading, with the expectations being based on a child’s education.

There is a range of behaviors associated with reading disability and ADHD, Willcutt explains, some of which are “externalizing” and some of which are “internalizing.”

Externalizing behaviors are those that children express outwardly—“things like aggression, delinquency or conduct problems,” says Willcutt—whereas internalizing behaviors “are more internally focused—so if you feel anxious or you feel depressed or withdrawn.”

Willcutt says that reading disability and ADHD frequently co-occur with both internalizing and externalizing behaviors, but the specific profile varies among children. One student with comorbid ADHD and reading disability may continually show up late to school and disrupt class, whereas another student with the same diagnoses may be quiet and anxious.

“And there are some different behavior clusters that seem to really matter,” Willcutt adds. “The kids who have reading disability and ADHD along with early aggressive or delinquent behaviors tend to be a subgroup that is at higher risk for more severe antisocial behaviors during adolescence. On the other hand, students who have ADHD and reading disability along with internalizing symptoms often show pronounced difficulties in the classroom because they are really anxious about their academic performance.”

Assessment and treatment

Willcutt says that one key takeaway from his and Petrill’s study is that comorbidity matters and is much more common than previously thought. “At least 25% of kids who have ADHD have a learning disability, which is much higher than we would expect by random chance.”

Willcutt therefore hopes those who read his and Petrill’s study, particularly clinicians, adjust their assessment practices in a way that addresses the potential for comorbid diagnoses.

We’re at the point of saying when a child has ADHD and reading disability, both conditions really warrant interventions. Rather than trying to decide which is more important, we should really target both of them by providing the optimal intervention for reading disability and the optimal intervention for ADHD.”

“If you’re assessing learning disabilities, it’s really important to also assess whether a child has attention problems, anxiety or conduct difficulties along with that. For clinicians who specialize in the assessment of ADHD, it's critical to include a screening measure to determine whether the child may also have learning problems. Our results suggest that it may matter quite a bit if they have a comorbid diagnosis.”

For the field more broadly, Willcutt hopes that his and Petrill’s work prompts other researchers to study treatments for comorbid learning disabilities and attentional difficulties.

“We’re at the point of saying when a child has ADHD and reading disability, both conditions really warrant interventions. Rather than trying to decide which is more important, we should really target both of them by providing the optimal intervention for reading disability and the optimal intervention for ADHD.”

In other words, if a child has both reading disability and ADHD, treating only one will likely have little to no effect on the other.

“Reading intervention might really help with the reading, but it may not address some of the other concerns that are also getting in the way for that child.”

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It’s surprisingly common for children to have both conditions, ��񱦵� researcher Erik Willcutt argues in a recently published paper.

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For some mammals, warming temperatures mean higher elevations

Anonymous — Tue, 15 Oct 2024 17:45:59 +0000

For some mammals, warming temperatures mean higher elevations Anonymous (not verified) Tue, 10/15/2024 - 11:45

In her Distinguished Research Lecture, ��񱦵� Professor Christy McCain will highlight how certain traits in some mammal and insect populations indicate who is at greatest risk from climate change

Colorado’s small, mountain-dwelling mammals are moving higher—not for better views or real estate, but because climate change is forcing them to.

This finding is based on a 13-year study of 27 rodent and four shrew species in Colorado’s Front Range and San Juan mountains—research that included trapping, tagging and releasing the various mammals to better understand their range.

While the findings are more complex than a simple trend of animals moving up the mountain, they spotlight the sobering possibility that climate change could force some mammals from Colorado entirely.

Christy McCain, a professor in the ��񱦵� Department of Ecology and Evolutionary Biology and curator of vertebrates in the CU Museum of Natural History, will discuss mountain biodiversity and climate change in her Distinguished Research Lecture Nov. 14.

“We’ve been talking about climate change in the Rockies for a long time, but I think we can say that this is a sign that things are now responding and responding quite drastically," Christy McCain, the study’s lead author, told Denver 7 in Feb. 2021.

McCain, a professor in the ��񱦵� Department of Ecology and Evolutionary Biology and curator of vertebrates in the CU Museum of Natural History, uses mountains as natural experiments to study biodiversity, ecological theory, global change, montane ecology and range limits.

She will discuss mountain biodiversity and climate change in her Distinguished Research Lecture Nov. 14, highlighting the research her lab has done to understand how animals—mostly vertebrates and insects—are distributed on mountains around the world.

She and her research colleagues have found that different groups of animals, driven by their evolutionary history and climate, show distinctive patterns. For example, mountain biodiversity for rodents, salamanders and moths is quite different from birds, bats and reptiles.

The conservation priorities for each group of mountain organisms are closely tied to elevational diversity patterns, land-use change and complex interactions with a rapidly warming and drying climate. McCain will explore these topics through case studies of mammal populations in the Front Range and San Juan Mountains and carrion beetles—examining how various physiological traits like heat and desiccation tolerance may be critical to responses to climate change.

About Christy McCain

McCain received dual bachelor’s degrees in wildlife biology and studio art from Humboldt State University, was a natural-resources and protected-areas specialist in the Peace Corps Honduras and earned her PhD in ecology and evolutionary biology from the University of Kansas.

She was a postdoctoral fellow at the National Center for Ecological Analysis and Synthesis at the University of California Santa Barbara before coming to ��񱦵� as an assistant professor in 2008.

If you go

What: 124th Distinguished Research Lecture, Mountain Biodiversity and Climate Change

Who: Professor Christy McCain of the Department of Ecology and Evolutionary Biology and CU Museum of Natural History

When: 4-5 p.m. Nov. 14, followed by a Q&A and reception

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

McCain studies how montane organisms are distributed on mountains around the world and how those populations and species are influenced by human land use and climate change. Her research spans topics across ecology and evolution to understand and conserve biodiversity.

Funded by the National Science Foundation through several grants, her research has appeared in more than 60 peer-reviewed journals, including Science, Ecology Letters, Ecology and Global Change Biology, among others.

McCain is the curator of vertebrate collections in the CU Museum of Natural History, where she is a steward for the continued protection and use of museum specimens for understanding and conserving the world’s biodiversity. Over the years, she has taught mammalogy as well as other topics in field biology, creative conservation messaging and mountain ecology and conservation.

About the Distinguished Research Lectureship

The Distinguished Research Lectureship is among the highest honors given by faculty to a faculty colleague at CU Boulder. Each year, the Research and Innovation Office requests nominations from faculty for this award, and a faculty review panel recommends one or more faculty members as recipients.

The lectureship honors tenured faculty members, research professors (associate or full) or adjoint professors who have been with ��񱦵� for at least five years and are widely recognized for a distinguished body of academic or creative achievement and prominence, as well as contributions to the educational and service missions of CU Boulder. Each recipient typically gives a lecture in the fall or spring following selection and receives a $2,000 honorarium.

McCain and Jamie Nagle, a professor of physics, have been recognized with 2024-25 Distinguished Research Lectureships. Nagle will give his lecture Feb. 6, 2025.

Top image: Eli Allan/Unsplash

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With newest laws, Taliban marks Afghan women as ‘easy targets,’ scholar says

Anonymous — Fri, 27 Sep 2024 19:40:05 +0000

With newest laws, Taliban marks Afghan women as ‘easy targets,’ scholar says Anonymous (not verified) Fri, 09/27/2024 - 13:40

Rachel Sauer

Professor Jennifer Fluri, a feminist political geographer, notes that the growing restrictions on women and girls are echoing strictness not seen since the 1990s

Speaking at U.N. Headquarters in New York City Monday, Oscar-winning actress Meryl Streep observed that household pets and rodents in Afghanistan have more rights than women under draconian new Taliban laws rolled out at the end of August.

“Today in Kabul, a female cat has more freedoms than a woman,” Streep said. “A cat may go sit on her front stoop and feel the sun on her face. She may chase a squirrel into the park. A squirrel has more rights than a girl in Afghanistan today, because the public parks have been closed to women and girls.”

Among other restrictions, the new laws ban women from reciting the Quran in public, raising their voices or looking at men other than their husbands or relatives, and they require all women to cover the lower halves of their faces in addition to covering their heads.

Jennifer Fluri, a professor and chair of the Department of Geography, notes that the newest Taliban restrictions are a huge blow to Afghan women, especially those in urban areas.

For Jennifer Fluri, a ��񱦵� professor of geography and chair of the Department of Geography, these newest laws—the latest in a steadily growing number of restrictions on women enacted since the Taliban regained power in 2021—are further evidence that for the Taliban, women are easy targets.

Fluri’s doctoral research focused on the Revolutionary Association of the Women of Afghanistan (RAWA), a clandestine feminist-nationalist organization. From that, her research interests evolved to studying the differentiated methods used by Afghans and internationals in Afghanistan to provide for their own security in spaces increasingly beset by political violence and a general state of insecurity.

From 2012 to 2021, she worked on two projects focusing on women's social and political activism, influence and power in Afghanistan: One examined women's roles in the peace process in Afghanistan, and the second focused on women's leadership and influence at different scales, from home and family to national political participation and governance—a project funded by the National Science Foundation.

However, despite her deep experience in the country, she hasn’t been able to travel there since 2019—first because of COVID restrictions and then because of those enacted by the Taliban—and has pivoted her research focus to Afghan refugees and asylum seekers in the United States and Canada, along with the status of women's rights and their social, political and economic participation in Afghanistan.

Fluri recently spoke with Colorado Arts and Sciences Magazine about the newest laws further restricting Afghan girls and women in education, movement and presence in public spaces.

Question: Since 2021, restrictions on women and girls in Afghanistan have gotten steadily stricter. How much worse are these new laws going to make their lives?

Fluri: It’s a huge blow to women, particularly women in urban areas, who had become more used to traveling with just a head scarf, not having to wear a burqa, not having a male escort. As we get further and further from August 2021, the leaders are being more and more emboldened to go back to the ‘90s version of the Taliban. At first it seemed like they were going to be more moderate, a sort of Taliban 2.0—I even thought that was the case, and so did a lot of women’s organizations and feminist activists—but now it’s looking pretty clear they’re going to keep cracking down more and more.

I’m also very critical of what the U.S. has done. I don’t think U.S. officials really took the full time and energy they should have to really do right by Afghan women and girls. It’s such a diverse population—educated urban women have a totally different experience than women in rural areas or women who are more conservative. Some women see Islamic feminism as a path, but even Islamic feminists can’t work with the Taliban. (The Taliban’s) reading of Islam is so narrow, even though the Quran says women and men are equal before God.

Question: These new laws seem really petty, for lack of a better word; why are the Taliban doing this?

Women in Kabul, Afghanistan, wait to receive food rations distributed by an international aid group in April 2023. (Photo: Ebrahim Noroozi/AP)

Fluri: To me, it’s such a silly law. It’s culturally expected that men and women don’t make eye contact—it's a sign of respect—that putting it into law seems unnecessary. It’s just another way of controlling women. I think this is the Taliban wanting all women to follow their very strict interpretations of the Quran and to gather control and power, because this law undercuts family-based or community-based ways of thinking about how people want to express religious beliefs or cultural beliefs, and how to dress or be in public. I hate to say it, but for the Taliban, women are easy targets.

Question: Do you worry that this will further stoke anti-Muslim rhetoric that seems to be getting louder around the world?

Fluri: My biggest frustration with the international aid and development community has been this tendency to blame Islam. Islam isn’t the problem. Women have more rights in Islam than they do in Afghan cultural practice. If the Taliban were following Islam, women would have many more rights, especially around education. Muhammad’s first wife, Khadijah, who he had his only surviving children with, worked outside the home. She was his (Muhammad’s) employer. There are so many examples of women, if you go back to the early days of Islam, who were involved in shaping the faith. Khadijah was the first convert to Islam, and Muhammad’s wife Aisha led men in battle and was the author of many hadiths (words and deeds attributed to the prophet Muhammad written by his closest interlocutors). Women were involved in the early formations of Islam.

Question: Do the Revolutionary Association of the Women of Afghanistan and other feminist groups like it still exist, or have they had to flee the country?

Fluri: They’re still in operation, but it’s always been a mostly underground movement—they believe in secularism and women’s rights—and now it’s even deeper underground. They’re doing work similar to work they were doing in the ‘90s: documenting, trying to get more international attention to the plight of women and running secret schools. In Afghanistan, their names have been dragged through the mud 100 times over, so they really do have to be incredibly careful. I would argue that’s why they have started other organizations in other names, because it allows them to continue to do the work without having such intense surveillance and them constantly being in danger of arrest.

Girls attend school in an outdoor classroom in Bamozai, Paktya Province, Afghanistan, in 2007. The Taliban now bans girls 12 and older from attending state-run schools and has banned young women from receiving higher education. (Photo: Capt. John Severns/U.S. Air Force)

I never published on this, because it’s not something they would be happy with, but I would argue RAWA has lot more influence in society than we even know about. Women have been educated in RAWA schools; they’ve started their own NGOs and different activist groups with RAWA support. The feminist philosophies of RAWA have kind of grown legs and created additional organizations. A lot of women who were very high-profile activists in Afghanistan have fled or sought asylum, but some have gone back. They’re working with colleagues or family members to continue to do that work, even though it’s incredibly difficult now.

A man I worked with for years, who worked as a driver for me and research assistant, I’m still trying to help his family and him seek asylum. He’s saying, ‘My daughters have no future here.’ It’s interesting how a number of men are also starting to be like, ‘This isn’t a good place for my daughters.’

Question: Is there anything people in, say, Colorado can do to help Afghan women and girls?

Fluri: Honestly, what I would say is reach out in your community to find out where Afghans who are refugees, who are trying to figure out how to make America work for them, are living. Help them make their way, which is incredibly difficult. It’s such a different culture from the U.S. and people sometimes have an idealistic vision of the U.S. The reality of trying to make ends meet can be so hard for them. So, I would say reach out to your nearest refugee center. I know Lutheran Family Services does a lot of work with refugees, and so does Jewish Family Service and Colorado Refugee Connect. Even just the local housing and human services does a lot of work to help resettle refugees.

Reaching out to volunteer, such as taking people to appointments, little things like that make such a huge difference. A lot of women who came don’t speak English, don’t drive, so their lives are more isolated here than they were in Afghanistan. When you don’t speak the language or know how to ride a bus in a new place, it can be really daunting just to figure out how to make it work for you and your family. The important thing is to look for organizations that are working with Afghans on their own terms and are not trying to tell people what’s best for them. Afghans know what’s best for them.

Top image: Women in traditional burqas walk past Hazrat Ali Mazar Mosque in Mazar-i-Sharif, Afghanistan. (Photo: Wasim Mirzaie)

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Professor Jennifer Fluri, a feminist political geographer, notes that the growing restrictions on women and girls are echoing strictness not seen since the 1990s.

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Amid growing war fatigue, some Ukrainians more willing to cede land

Anonymous — Thu, 19 Sep 2024 15:36:49 +0000

Amid growing war fatigue, some Ukrainians more willing to cede land Anonymous (not verified) Thu, 09/19/2024 - 09:36

Growing number of war-weary Ukrainians would reluctantly give up territory to save lives, suggests recent survey

The Ukrainian president, Volodymyr Zelensky, is trying his best to shake up the dynamics of the Russia-Ukraine war. He recently undertook a major cabinet reshuffle in which he replaced no fewer than nine ministers, including his foreign minister, Dmytro Kuleba. Announcing the changes, Zelensky said he wanted his government to be “more active” in pressing for aid from its western allies.

These cabinet changes came as Ukraine pressed ahead with its offensive in the Kursk oblast in Russia. Zelensky has said that holding some Russian territory will give Kyiv leverage for future territorial exchange negotiations with Russia.

And, while criticism of Zelensky’s gamble has increased as Ukraine’s position in the Donbas in the east of the country has deteriorated, seeing Ukrainian soldiers turn the table on Russia has undeniably given Ukrainians a morale boost.

John O'Loughlin, a ��񱦵� professor of geography, is a political geographer especially interested in the spatial and territorial aspects of conflict. He and co-researchers Kristin M. Bakke and Gerard recently conducted telephone surveys of 2,200 adults in government-controlled areas of Ukraine.

Ukrainians needed this. As the war has endured and its costs mounted, morale and public health have suffered.

We have tracked Ukrainian sentiment for years. In June and July 2024, in cooperation with the Kyiv International Institute for Sociology (KIIS), we conducted a telephone public opinion survey of 2,200 respondents representative of the adult population of government-controlled areas of Ukraine. This was to follow up on a survey from Oct. 2022.

We should treat wartime polls with caution. But our survey findings suggest people are worried about war weariness among their fellow Ukrainians. It also suggests that there is growing, if reluctant, support for negotiations and territorial concessions.

Open to compromise

Attitudes among Ukrainians toward territorial concessions have also started to shift—but only slightly. Most people have opposed giving up land since 2014, but KIIS’s own regular omnibus survey provides evidence of growing recognition, now shared by one-third of Ukrainians, that territorial concessions may be necessary.

In June-July 2024 we repeated a question we asked in Oct. 2022 on territorial concessions, shown in the figure below. “All choices about what to do during this current Russian aggression have significant, but different, costs. Knowing this, which of the following four choices should the Ukraine government take at this time?”

The biggest change was this: in 2022, 71% of respondents supported the proposition to “continue opposing Russian aggression until all Ukrainian territory, including Crimea, is liberated," but in 2024 the support for that option had dropped to 51%.

In 2022, just 11% agreed with “trying to reach an immediate ceasefire by both sides with conditions and starting intensive negotiations." In 2024, that share had increased to 31%.

But there are differences in how people look at these choices. Much depends on whether they have been displaced (though whether they lost family members or friends does not seem to make a difference), whether they worry about war fatigue among their fellow Ukrainians, and whether they are optimistic or pessimistic about western support.

There is more at stake in this war than territory—not least, saving lives, ensuring Ukraine’s sovereignty, and protecting the country’s future security. KIIS’s own recent research has shown that in a hypothetical negotiation scenario, people’s views on the importance of preserving territorial integrity might depend on how any possible deal might safeguard other things they care about.

For two and a half years, the brutal war has affected everyday lives of Ukrainians, and many (43%) believe that the war will last at least another year. Most of the respondents in our survey had not been physically injured in Russian violence (12% had), but about half had witnessed Russian violence, and most had lost a close family member or friend (62%). About one-third had been displaced from their homes.

Consistent with an increasing number of reports, the survey shows growing recognition of war fatigue. Rather than asking directly about whether respondents felt this themselves, we asked whether they worried about it among fellow Ukrainians. The results were revealing: 58% worry “a lot” and 28% worry “a little," whereas only 10% report that they do not worry about war fatigue.

People in Ukraine mark the second anniversary of the beginning of the war in February. (Photo: Efrem Lukatsky/AP Photo)

While there are signs of war weariness among Ukraine’s western allies, our surveys show that Ukrainians are still broadly optimistic about continued western support, though less so than in October 2022. About 19% believe western support will grow (down from 29% in 2022), while 35% believe it will stay the same (41% in 2022). Almost a quarter (24%) believe it will continue but at a lower level than now (up from 16% in 2022), and 13% believe it is unlikely to continue (up from 3% in 2022).

Life or death

Research from early on in the war showed that Ukrainians strongly preferred strategies that preserved the country’s political autonomy and restored the entirety of its territory. This would hold, “even if making concessions would reduce projected civilian and military deaths, or the risk of a nuclear strike over the next three months."

As the authors of the study pointed out: “Russian control of the government in Kyiv or of territories in the east would put the lives of many Ukrainians at risk, as it is well documented that Russia has committed widespread human rights violations in temporarily occupied territories.”

Given the war’s accumulating death toll, in our 2024 survey we designed a simple framing experiment that can give us an indication of whether considerations about loss of life may shape people’s views on negotiations. We asked half of the respondents, randomly selected, if they would accept that “Ukraine concede some of its territories to end the war”. About 24% said yes.

For the other half, we asked if they would accept that “Ukraine concede some of its territories to save lives and end the war." In that case, 34% said yes. So, if—rightly or wrongly—territorial concessions are associated with saving lives, it increases support for them.

But when asked directly in the 2024 survey if they agreed with the statement “Russia should be allowed to control the territory it has occupied since 2022," 90% disagreed. So, while there is still majority—if diminished—support for fighting to restore full territorial integrity, there is growing support for negotiations.

What we also know from our surveys is that there is very little evidence that Russia’s territorial annexations will ever have any legitimacy among Ukrainians.

John O'Loughlin is a professor in the Department of Geography at the ��񱦵�. His co-authors are Kristin M Bakke, a professor of political science and international relations at University College London, and Gerard Toal, a professor of government and international affairs at Virginia Tech.

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Growing number of war-weary Ukrainians would reluctantly give up territory to save lives, suggests recent survey.

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Samuel Ramsey receives the prestigious Lowell Thomas Award

Anonymous — Tue, 17 Sep 2024 19:26:37 +0000

Samuel Ramsey receives the prestigious Lowell Thomas Award Anonymous (not verified) Tue, 09/17/2024 - 13:26

Once frightened of insects, Ramsey has become a leader in the field of entomology

Samuel Ramsey, assistant professor of ecology and evolutionary biology at the ��񱦵�, is one of this year’s recipients of the Lowell Thomas Award.

The Lowell Thomas Award, named after broadcast journalist and explorer Lowell Thomas and given by The Explorers Club, recognizes “excellence in domains or fields of exploration,” according to the award announcement. In particular, the award celebrates “individuals who have grit, tenacity, are undaunted by failure, and endure all obstacles, finding a way forward to discovery and results that expand the limits of knowledge.”

Samuel Ramsey (left) working with the chieftain of a hill tribe village in Thailand to sample domesticated bees for parasites. (Photo: Shin Arunrugstichai/Syzgy Media Co.)

Ramsey, also known as “your friendly neighborhood entomologist,” didn’t always like insects. They used to terrify him. But in the second grade he conquered his fears by learning about insects at his local library.

Now, more than 25 years later, Ramsey is one of the most innovative and distinguished thinkers in the field of entomology. His research has won him numerous awards, including first place in the International Three-Minute Thesis Competition, the American Bee Research Conference’s Award for Distinguished Research and the Acarological Society of America’s Highest Award for Advances in Acarology Research.

Ramsey—a member of the Explorers Club 50, class of 2024—also runs a nonprofit, the Ramsey Research Foundation, which seeks to protect pollinator diversity.

Ramsey’s fellow awardees this year are zoologist Carole Baldwin, ocean conservationist Ellen Pikitch and geothermal scientist Andrés Ruzo. Past recipients include Kathy Sullivan, E. O. Wilson, Kris Tompkins, Isaac Asimov, Sir Edmund Hillary and Carl Sagan.

The 2024 Lowell Thomas Awards Dinner takes place in Austin on Nov. 1.

Top image: Samuel Ramsey researching bee biodiversity in Thailand. (Photo: Shin Arunrugstichai/Syzgy Media Co.)

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