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In traditional light-harvesting methods, energy from one photon only excites one electron or none depending on the absorber’s energy gap, transferring just a small portion of light energy into electricity. The remaining energy is lost as heat. But in a paper released May 13 in Science Advances, Wu, UW associate professor Xiaodong Xu and colleagues at four other institutions describe one promising approach to coax photons into stimulating multiple electrons. Their method exploits some surprising quantum-level interactions to give one photon multiple potential electron partners.

The amount of marijuana allowed to be grown by state-licensed producers in Washington is enough to satisfy both the medical and recreational marijuana markets, a University of Washington study released today finds. The state Liquor and Cannabis Board (LCB) tasked the UW-based Cannabis Law and Policy Project (CLPP) with calculating the “grow canopy,” or square footage, required to supply the state’s medical marijuana market as it becomes folded into the state’s retail system, as required by the 2015 Cannabis Patient…

The University of Washington is leading a new, four-year collaboration aimed at promoting mental health and preventing suicide at colleges and universities around the state. The initiative is a partnership between Forefront: Innovations in Suicide Prevention — an organization in the UW School of Social Work — and the New York-based Jed Foundation, which focuses on protecting emotional health and preventing suicide among college students. The effort kicked off May 10 at a Forefront conference in Bellevue, where 12 schools…

Some adults learn a second language better than others, and their secret may involve the rhythms of activity in their brains. New findings by scientists at the University of Washington demonstrate that a five-minute measurement of resting-state brain activity predicted how quickly adults learned a second language. The study, published in the June-July issue of the journal Brain and Language, is the first to use patterns of resting-state brain rhythms to predict subsequent language learning rate. “We’ve found that a…

The idea that the young Earth had a thicker atmosphere turns out to be wrong. New research from the University of Washington uses bubbles trapped in 2.7 billion-year-old rocks to show that air at that time exerted at most half the pressure of today’s atmosphere. The results, published online May 9 in Nature Geoscience, reverse the commonly accepted idea that the early Earth had a thicker atmosphere to compensate for weaker sunlight. The finding also has implications for which gases…

Rock your baby in sync with music and you may wonder how the experience affects her and her developing brain. A new study by scientists at the University of Washington’s Institute for Learning & Brain Sciences (I-LABS) shows that a series of play sessions with music improved 9-month-old babies’ brain processing of both music and new speech sounds. “Our study is the first in young babies to suggest that experiencing a rhythmic pattern in music can also improve the ability…

The number of children in foster care across the country is driven not solely by child abuse and neglect, but by states’ varying politics and approaches to social problems, a new University of Washington study finds. States with more punitive criminal justice systems tend to remove children from their homes far more frequently than those with generous welfare programs – meaning that two states with similar rates of child abuse and neglect could have very different rates of foster care…

Each fall, monarch butterflies across Canada and the United States turn their orange, black and white-mottled wings toward the Rio Grande and migrate over 2,000 miles to the relative warmth of central Mexico. This journey, repeated instinctively by generations of monarchs, continues even as monarch numbers have plummeted due to loss of their sole larval food source — milkweed. But amid this sad news, a research team believes they have cracked the secret of the internal, genetically encoded compass that the…

A University of Washington-led research team has won a $7.5 million, five-year Multidisciplinary University Research Initiative (MURI) grant from the Department of Defense to better model and mount defenses against stealthy, continuous computer hacking attacks known as “advanced persistent threats.”

In the maelstrom of information, opinion and conjecture that is Twitter, the voice of truth and reason does occasionally prevail, according to a new study from UW researchers. Tweets from “official accounts” — the government agencies, emergency responders, media or companies at the center of a fast-moving story — can slow the spread of rumors on Twitter and correct misinformation that’s taken on a life of its own.

Many brain studies show that bilingual adults have more activity in areas associated with executive function, a set of mental abilities that includes problem-solving, shifting attention and other desirable cognitive traits. Now new findings reveal that this bilingualism-related difference in brain activity is evident as early as 11 months of age, just as babies are on the verge of producing their first words. “Our results suggest that before they even start talking, babies raised in bilingual households are getting practice…

The authors of a new paper in Science propose a set of social indicators that can be used to gauge how ecosystem management affects four essential factors in human lives: well-being, values, the ability to act purposefully and inequality. Considering such indicators, they note, serves not only to describe what exists but to define what is important in setting sustainability goals.

After her husband ended his life with a bullet in 2011, Jennifer Stuber went to the two Washington stores where he had bought guns to talk with the owners about suicide prevention. That bold move by Stuber, an associate professor at the University of Washington School of Social Work, eventually led to the passage of a bill signed into state law March 31 by Gov. Jay Inslee. The bill brings together two unlikely partners — the firearms industry and suicide…

The University of Washington will create an undergraduate minor in real estate studies thanks to a $5.4 million gift from retired Windermere Real Estate founder John Jacobi and his wife, Rosalind. The Jacobis’ gift will also support two new endowed faculty chairs at the Runstad Center for Real Estate Studies in the UW’s College of Built Environments.

Adults often form fast opinions about each other’s personalities, especially when it comes to negative traits. If we see someone argue with another driver over a parking space, for instance, we may assume that person tends to be confrontational. Two new research studies with hundreds of 15-month-old infants demonstrate that babies form similar generalizations about others and make attempts to appease adults they consider prone to anger. The research, by scientists at the University of Washington’s Institute for Learning &…