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An analysis of the health care records of 1.2 million Southern California residents found that higher long-term smoke exposure was associated with a significant increase in the odds that a person would be diagnosed with dementia. Exposure to non-wildfire PM2.5 also increased a person’s risk of dementia, but to a much lesser degree.  

A new study led by the University of Washington has for the first time quantified the risk for whale-ship collisions worldwide for four geographically widespread ocean giants that are threatened by shipping: blue, fin, humpback and sperm whales. In a paper published online Nov. 21 in Science, researchers report that global shipping traffic overlaps with about 92% of these whale species’ ranges. Only about 7% of areas at highest risk for whale-ship collisions have any measures in place to protect whales from this threat. These measures include speed reductions, both mandatory and voluntary, for ships crossing waters that overlap with whale migration or feeding areas.

A team led by scientists at the University of Washington and the University of Aberdeen attached tiny “backpack” trackers to hummingbirds in the Colombian Andes to learn more about their movements. As they report in a paper published Oct. 10 in the journal Ecology and Evolution, the tracking system will aid conservation efforts in this region by revealing the previously hidden movements of hummingbirds and other small animals.

As Earth faces unprecedented climate change, a look into the planet’s deep past may provide vital insights into what may lie ahead. But knowledge of the natural world millions of years ago is fragmented. A 15-year study of a site in Bolivia by a joint U.S.-Bolivia team has provided a comprehensive view of an ancient ecosystem when Earth was much warmer than it is today, and changed how we look at the Andes.

NASA has awarded a five-year, $2.5 million grant to establish a regional scientific consortium based at the University of Washington, in partnership with Washington State University and the Pacific Northwest National Laboratory. The consortium will use an interdisciplinary approach to explore how the space environment — both in low-Earth orbit and beyond — affects living things.

Chelsea Wood, a University of Washington associate professor of aquatic and fishery sciences, has an upcoming children’s book titled “Power to the Parasites! Everything You (N)ever Wanted to Know About the Creepy Crawlies Hidden in Your Home, Your Food, Your Pets – and Maybe Even in You!” The book introduces kids to the world of parasitism.

Researchers from the University of Washington have discovered a new way to help liquid flow in only one direction, but without using the flaps that engines and our circulatory system rely upon to prevent fluid backup. The team built a flexible pipe with an interior helical structure inspired by the anatomy of shark intestines — creating a prototype inspired by biology but with applications in engineering and medicine.

Some of the most dramatic climatic events in our planet’s history are “Snowball Earth” events that happened hundreds of millions of years ago, when almost the entire planet was encased in ice up to 0.6 miles thick. New research from the University of Washington provides a more complete picture for how the last Snowball Earth event ended, and suggests why it preceded a dramatic expansion of life on Earth, including the emergence of the first animals.

Ashleigh Theberge, associate professor of chemistry at the University of Washington, has been named to the Schmidt Sciences Polymath Program, entitling her to grants of up to $2.5 million over five years to “pursue risky, novel theories that would otherwise be difficult to fund,” according to a Sept. 10 announcement from Schmidt Sciences. Theberge — one of six awardees this year — was selected from an applicant pool of 117, and is the first UW faculty member selected for the program, which is in its third year.

UW researchers have developed a flexible, durable electronic prototype that can harvest energy from body heat and turn it into electricity that can be used to power small electronics, such as batteries, sensors or LEDs. This device is also resilient — it still functions even after being pierced several times and then stretched 2,000 times.

New research led by the University of Washington and the National Oceanic and Atmospheric Administration has revealed how underwater noise produced by humans may help explain why southern resident orca populations have not recovered from historic lows. In a paper published Sept. 10 in Global Change Biology, the team reports that underwater noise pollution — from both large and small vessels — forces northern and southern resident orcas to expend more time and energy hunting for fish. The din also lowers the overall success of their hunting efforts. Noise from ships likely has an outsized impact on southern resident orca pods, which spend more time in parts of the Salish Sea with high ship traffic.

An international team led by researchers at the University of Washington has uncovered surprising details about mosquito mating, which could lead to improved malaria control techniques and even help develop precision drone flight. In a paper published Aug. 30 in the journal Current Biology, the team revealed that when a male Anopheles coluzzii mosquito hears the sound of female-specific wingbeats, his eyes “activate” and he visually scans the immediate vicinity for a potential mate.

NASA’s upcoming Nancy Grace Roman Space Telescope will look for “fossils” of galaxy formation by conducting high-resolution imaging studies. Through a grant from NASA, astronomers are designing a set of possible observations called RINGS — the Roman Infrared Nearby Galaxies Survey — that would collect these images, and the team is producing publicly available tools that the astronomy community can use once Roman launches and starts collecting data.

The overlap between humans and animals will increase substantially across much of the planet in less than 50 years due to human population growth and climate change, according to a collaborative study by scientists at the University of Michigan, the University of Washington and University College London. By 2070, the overlap between humans and more than 22,000 vertebrate species will rise across nearly 57% of Earth’s land, according to the team.

The Colorado River and its tributaries provide water for hydropower, irrigation and drinking water in seven U.S. states and Mexico. But since 2000, water managers have struggled to predict how much water will come from the snowpack. The problem lies with the lack of rainfall in the spring, according to new research from the UW.

A new study has found galaxies with more neighbors tend to be larger than their counterparts that have a similar shape and mass, but reside in less dense environments. In a paper published Aug. 14 in the Astrophysical Journal, the team, which used a machine-learning algorithm to analyze millions of galaxies, reports that galaxies found in denser regions of the universe are as much as 25% larger than isolated galaxies. The findings resolve a long-standing debate among astrophysicists over the relationship between a galaxy’s size and its environment, but also raise new questions about how galaxies form and evolve over billions of years.

Young adults with psychosis tend to use cannabis at extremely high rates, and their symptoms can be exacerbated by long-term marijuana use. A team of University of Washington researchers is focused on this particular group. 

Fifteen faculty members at the University of Washington have been elected to the Washington State Academy of Sciences for 2024. They are among 36 scientists and educators from across the state announced Aug. 1 as new members. Selection recognizes the new members’ “outstanding record of scientific and technical achievement, and their willingness to work on behalf of the academy to bring the best available science to bear on issues within the state of Washington.”

Research led by the University of Washington used computer models to pinpoint varieties of corn that will be best adapted to produce high yields in future U.S. climates. The study combined weather and climate projections across the U.S. for 2050 and 2100 with a plant model that simulates corn’s growth to find the mix of traits that will produce the highest, most reliable yield under future conditions across the country.

Jeffrey Riffell, a University of Washington professor of biology, wants to understand how female mosquitoes find find a host to bite for a bloody meal. His research has shown that hungry mosquitoes find us by following a trail of scent cues, including chemicals exuded by our skin and sweat, as well as the carbon dioxide gas we exhale with each breath. Mosquitoes also like colors, at least certain ones. His team is closing in on how the sense of smell and vision work together to help a mosquito zero in for the final strike and get her blood meal.

UW doctoral student Joel Eklof has been investigating which environmental factors contribute to permafrost thaw and the release of methane into the atmosphere. For years, Eklof has traveled to a field site southwest of Fairbanks, Alaska.

A UW atmospheric scientist will participate in a campaign to study winter storms and snowfall in northwestern Colorado’s Rocky Mountains. Like Seattle, this area depends on winter snow for its summer water supplies, so improving mountain snow forecasts will improve projections for summer drought and wildfire risks.

Spending time in nature is good for us. And knowing more about nature’s effects on our bodies could not only help our well-being, but could also improve how we care for land, preserve ecosystems and design cities, homes and parks. Many studies have focused on how seeing nature affects us. A team of scientists from around the world wants to understand what the nose knows. They are calling for more research into how odors and scents from natural settings impact our health and well-being.

A project led by the University of Washington to better understand our atmosphere’s complexity is a finalist for NASA’s next generation of Earth-observing satellites. STRIVE will receive $5 million to conduct a one-year concept study, and then will hear whether it is selected for launch.

As often as four days a week, Boeing EA-18G Growler electronic attack aircraft based at Naval Air Station Whidbey Island fly loops overhead as pilots practice touch-and-go landings. The noise is immense. New research from the University of Washington shows that the noise isn’t just disruptive — it presents a substantial risk to public health.

A detailed reconstruction of climate during the most recent ice age, when a large swath of North America was covered in ice, provides information on the relationship between CO2 and global temperature. Results show that while most future warming estimates remain unchanged, the absolute worst-case scenario is unlikely.

Eclipses past and present aren’t just opportunities for incredible sights. Generations of researchers have used them to study phenomena ranging from the sun itself to the fabric of the universe. UW News intervewed Emily Levesque, author and associate professor of astronomy, about what scientists past and present have learned by studying eclipses.

Could life be found in frozen sea spray emitted from moons orbiting Saturn or Jupiter? New research finds that life can be detected in a single ice grain containing one bacterial cell or portions of a cell. The results suggest that if life similar to that on Earth exists on these planetary bodies, this life should be detectable by instruments launching in the fall.

In 2021, Colin Orion Chandler started Active Asteroids Citizen Science, a partnership between NASA, Zooniverse, astronomers and thousands of citizen scientist volunteers. The initiative is searching for so-called “active asteroids,” which have comet-like tails and could hold clues to the formation of our solar system, among other cosmic mysteries. Chandler, now a University of Washington researcher, and his team recently announced they have discovered 15 active asteroids, and are continuing the search for more of these unusual and rare objects.