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Scientists have uncovered the first direct evidence that ancient Americans relied primarily on mammoth and other large animals for food. Their research sheds new light on both the rapid expansion of humans throughout the Americas and the extinction of large ice age mammals.

Male African elephants have distinct personality traits, but also adapt their behavior to suit the social context, according to a new study.

Two massive asteroids hit Earth around 35.65 million years ago, but did not lead to any lasting changes in the Earth's climate, according to a new study.

Exposure to car exhaust from leaded gas during childhood altered the balance of mental health in the U.S. population, making generations of Americans more depressed, anxious and inattentive or hyperactive, according to researchers. They estimate that 151 million cases of psychiatric disorder over the past 75 years have resulted from...

Previous research found that insects can ingest and absorb pure, unrefined microplastics -- but only under unrealistic, food-scarce situations. Zoologists have now tested mealworms in a more realistic scenario, feeding them ground-up face masks -- a common plastic product -- mixed with bran, a tastier option. After 30 days, the...

Trying to improve the efficiency of solar cells to become independent from fossil energy sources is a major goal of solar cell research. Physicists now combine perovskite with organic absorbers to form a record-level tandem solar cell.

The University of Alaska Fairbanks released a new report this week highlighting environmental changes and extremes that impact Alaskans and their livelihoods. 'Alaska's Changing Environment' provides people with timely, reliable and understandable information on topics ranging from temperature and precipitation changes to salmon and polar bears.