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New Red Algae Are Threatening Hawaii’s Coral Reefs, Scientists Say

On a routine trip to monitor ocean wildlife near the northwestern Hawaiian Islands in 2016, researchers noticed small patches of red algae they had never seen before growing on the…

Spirit Bears’ Hair Helps Reveal New Genetic Secrets

Douglas Neasloss was skeptical that Spirit bears existed. A member of the Kitasoo/Xai’xais First Nation in Canada, he had heard the stories of white-furred bears that roamed British Columbia’s rainforest.…

365 Elephants Died in Botswana. The Cause Is a Mystery

On May 25, conservationists were flying over Botswana’s Okavango Panhandle when they counted something disturbing: 169 dead elephants. A second flight in June revealed more carcasses, bringing the total to…

Scrutinizing SpaceX, NASA Overlooked Some Boeing Software Problems

After a couple of rounds of investigation and some soul-searching, NASA and Boeing believe that they have identified what went wrong during a troubled test flight of an uncrewed Boeing…

Could You Make a Snowball of Neutrinos?

“How many neutrinos would you need to make a snowball? Would it feel cold and squishy if you were hit in the face, or would it just pass through?” —…

Some Polynesians Carry Native American DNA, Study Finds

About 3,000 years ago, people on the eastern edge of Asia began sailing east, crossing thousands of miles of ocean to reach uninhabited islands. Their descendants, some 2,000 years later,…

US cities are losing 36 million trees a year. Here’s why it matters

If you’re looking for a reason to care about tree loss, the nation’s latest heat wave might be it. Trees can lower summer daytime temperatures by as much as 10…