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University of Washington


Unraveling the mystery of the missing blue whale calves

Researchers propose that timing hypothesis explains the mystery of missing blue whale calves, where births occur in fall and winter, and calves are weaned before returning to feeding areas. This explanation offers alternative insight into high pregnancy rates vs. low sightings of mother-calf pairs.

SourceUniversity of Washington·JournalEndangered Species Research·TypeObservational study·DateFeb 21, 2025

Coffee grounds and Reishi mushroom spores can be 3D printed into a compostable alternative to plastics

A team of researchers at the University of Washington has developed a novel method for 3D printing objects using a mixture of coffee grounds, brown rice flour, and Reishi mushroom spores. The resulting material is compostable, lightweight, and strong, with a density similar to that of polystyrene foam.

SourceUniversity of Washington·Journal3D Printing and Additive Manufacturing·DateFeb 18, 2025

Some species of baleen whales avoid attracting killer whales by singing too low to be heard

Baleen whale species that flee from killer whales produce calls at deep frequencies undetectable to their predators, while others sing higher-frequency songs that are easily heard. This 'flight' vs 'fight' difference influences all aspects of baleen whale behavior, from migration patterns and communication to mating and feeding habits.

SourceUniversity of Washington·JournalMarine Mammal Science·TypeLiterature review·DateFeb 6, 2025

Q&A: How rate of CO2 rise can affect a global ocean current

A recent University of Washington study found that a slower increase in atmospheric carbon dioxide levels has less impact on the Atlantic Ocean's circulation. The research, published in PNAS, suggests that this slowdown allows the ocean system more time to adapt to rising CO2 levels and mitigates its effects.

SourceUniversity of Washington·JournalProceedings of the National Academy of Sciences·TypeComputational simulation/modeling·DateJan 28, 2025

Panorama of our nearest galactic neighbor unveils hundreds of millions of stars

The Hubble Space Telescope has captured a panoramic view of the Andromeda Galaxy, unveiling hundreds of millions of stars and providing new clues to its evolutionary history. The galaxy's unique structural features, such as coherent streams of stars, suggest a more active recent star formation and interaction history than the Milky Way.

SourceUniversity of Washington·JournalThe Astrophysical Journal·TypeObservational study·DateJan 17, 2025

By looking at individual atoms in tooth enamel, UW and PNNL researchers are learning what happens to our teeth as we age

Researchers at UW and PNNL studied atomic composition of enamel samples from two human teeth, one 22-year-old and one 56-year-old, to understand how enamel changes with age. The study found higher levels of fluoride in the older tooth's shell regions, which could have implications for understanding tooth health as we age.

SourceUniversity of Washington·JournalCommunications Materials·DateDec 19, 2024

Record-low Antarctic sea ice can be explained and forecast months out by patterns in winds

Researchers at the University of Washington used a global climate model to simulate how ocean and air temperatures affect sea ice in the Southern Ocean. They found that warm Southern Ocean conditions and patterns in winds can explain 70% of the record-low winter sea ice extent in 2023, with similar predictions made for 2024.

SourceUniversity of Washington·JournalCommunications Earth & Environment·TypeComputational simulation/modeling·DateDec 6, 2024

UW-led research links wildfire smoke exposure with increased dementia risk

A recent study led by the University of Washington found that higher long-term exposure to wildfire smoke is associated with a significant increase in the odds of developing dementia. The researchers analyzed health records of 1.2 million Southern California residents and found that exposure to wildfire PM2.5 increased the risk of deme...

SourceUniversity of Washington·JournalJAMA Neurology·TypeObservational study·DateNov 25, 2024

Fewer than 7% of global hotspots for whale-ship collisions have protection measures in place

A new study led by the University of Washington found that only about 7% of areas at highest risk for whale-ship collisions have any measures in place. The team identified high-risk regions, including coastal areas along the Mediterranean, Americas, southern Africa, and parts of Asia, where whales and ships are most likely to meet.

SourceUniversity of Washington·JournalScience·TypeObservational study·DateNov 21, 2024

One or many? Exploring the population groups of the largest animal on Earth

A team of researchers analyzed historical marking data from the Discovery Marking Program to investigate Antarctic blue whale population structure. They found frequent mixing among ocean basins, indicating a single circumpolar population. This study provides valuable insights into the conservation of this endangered species.

SourceUniversity of Washington·JournalEndangered Species Research·TypeMeta-analysis·DateNov 15, 2024

Q&A: After developing a better way to count homelessness, UW researchers discuss how more accurate data can help providers and people

Researchers developed a method that taps into social networks to generate a more representative sample, providing a more accurate estimate of the total unhoused population. The new approach aims to improve understanding of homelessness in America by capturing demographic data and needs.

SourceUniversity of Washington·JournalAmerican Journal of Epidemiology·TypeData/statistical analysis·DateNov 4, 2024

Rocky planets orbiting small stars could have stable atmospheres needed to support life

A University of Washington-led study suggests that rocky planets orbiting M-dwarf stars can maintain stable atmospheres over time, enhancing the chances of supporting life. The James Webb Space Telescope has observed hotter planets without significant atmospheres, but temperate planets in the 'Goldilocks zone' may have stable atmospheres.

SourceUniversity of Washington·JournalNature Communications·TypeComputational simulation/modeling·DateOct 23, 2024

Sweetened beverage taxes decrease consumption in lower-income households by nearly 50%, UW study finds

A new study from the University of Washington found that lower-income households decreased their purchases of sweetened beverages by nearly 50%, while higher-income households reduced purchases by 18%. The tax was implemented in four U.S. cities and resulted in a significant decline in consumption among lower-income households.

SourceUniversity of Washington·JournalHealth Economics·DateOct 21, 2024

To make fluid flow in one direction down a pipe, it helps to be a shark

A team of researchers from the University of Washington has developed a flexible pipe with an interior helical structure inspired by shark intestines, which can keep fluid flowing in one direction without flaps. The design rivaled and exceeded Tesla valves, a one-way fluid flow device invented over a century ago.

SourceUniversity of Washington·JournalProceedings of the National Academy of Sciences·TypeExperimental study·DateSep 25, 2024

What’s for dinner? Scientists unearth key clues to cuisine of resident killer whales

Researchers analyzed DNA in fecal samples to determine the diet of Alaska and southern resident killer whales. They found that both populations prefer salmon, but differ in when they switch to hunting other fish species. The study provides key insights into the delicate balance between regional abundance of different fish species.

SourceUniversity of Washington·JournalRoyal Society Open Science·TypeObservational study·DateSep 19, 2024

Thanks to humans, Salish Sea waters are too noisy for resident orcas to hunt successfully

Underwater noise pollution from human activities significantly impacts the ability of orcas to hunt successfully in the Salish Sea. The study found that increased ambient noise levels, particularly around vessel propellers, interfere with echolocation behavior and hunting efforts. This hindrance affects females more than males, potenti...

SourceUniversity of Washington·JournalGlobal Change Biology·TypeObservational study·DateSep 10, 2024

Why isn't Colorado's snowpack ending up in the Colorado River? New research suggests the problem might be the lack of spring rainfall

A recent study by University of Washington researchers found that warmer, drier springs account for almost 70% of the discrepancy between predicted and actual streamflow in Colorado. The team's findings suggest that plants rely more on snowmelt during dry springs, leaving less water to flow into nearby streams.

SourceUniversity of Washington·JournalGeophysical Research Letters·DateAug 16, 2024

Galaxies in dense environments tend to be larger, settling one cosmic question and raising others

A new study published in the Astrophysical Journal has found that galaxies in denser environments are up to 25% larger than isolated galaxies. Researchers used a machine learning tool to analyze millions of galaxies and found a clear trend: galaxies with more neighbors are also on average larger.

SourceUniversity of Washington·JournalThe Astrophysical Journal·TypeObservational study·DateAug 14, 2024

Using photos or videos, these AI systems can conjure simulations that train robots to function in physical spaces

Researchers have developed AI systems that use photos or videos to create simulations for training robots in real settings. The RialTo system generates highly accurate simulations of specific environments, while the URDFormer system creates generic simulations quickly and cheaply. These advancements aim to lower costs and increase acce...

Q&A: How AI affects kids’ creativity

Researchers found that AI tools require support from adults and peers for kids to integrate them meaningfully into their creative practices. The study highlights the need for tailored design approaches that account for children's unique needs and developmental stages.

SourceUniversity of Washington·JournalProceedings of the ACM on Human-Computer Interaction·DateMay 29, 2024