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Dogs may not wash their paws compulsively, but some humans and canines have similar genetic mutations that may influence obsessive behavior. Ute Grabowsky/Photothek via Getty Images hide caption

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Ute Grabowsky/Photothek via Getty Images

Scott Kelly is seen floating during a spacewalk in 2015. NASA/Getty Images hide caption

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NASA/Getty Images

Astronaut Scott Kelly's Latest Mission: A Book

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Nostalgia Isn't Just A Fixation On The Past - It Can Be About The Future, Too

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Sleep Scientist Warns Against Walking Through Life 'In An Underslept State'

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Seafood processors like Ocean Beauty are some of the largest energy consumers in Kodiak, Alaska, which has generated more than 99 percent of its electricity from renewable sources since 2014. Here, the Ocean Beauty seafood plant. Eric Keto/Alaska's Energy Desk hide caption

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Eric Keto/Alaska's Energy Desk

After Hurricane Power Outages, Looking To Alaska's Microgrids For A Better Way

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The collision of two neutron stars, seen in an artist's rendering, created both gravitational waves and gamma rays. Researchers used those signals to locate the event with optical telescopes. Robin Dienel/Carnegie Institution for Science hide caption

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Robin Dienel/Carnegie Institution for Science

Astronomers Strike Gravitational Gold In Colliding Neutron Stars

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She's not tuning in, she's tuning inward — letting go of stress, or at least trying to, with a mindfulness app on her phone. Photo Illustration by Carolyn Rogers/NPR hide caption

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Photo Illustration by Carolyn Rogers/NPR

Mindfulness Apps Aim To Help People Disconnect From Stress

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Tape worm pills were once advertised as a way to stay thin. Courtesy of Workman Publishing hide caption

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Courtesy of Workman Publishing

'Quackery' Chronicles How Our Love Of Miracle Cures Leads Us Astray

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The post-fire entryway of the Anova school, which was located in Santa Rosa's Luther Burbank Center for the Arts. Adam Grossberg/KQED hide caption

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Adam Grossberg/KQED

Snails Senda (left), Jara, Tomeau, Jeremy and Indi hang out together at the University of Nottingham's labs. Jeremy was the lab's original sinistral snail; the others are his "Spanish pals," as scientist Angus Davison puts it. Angus Davison/University of Nottingham hide caption

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Angus Davison/University of Nottingham

Joseph Lister directing the use of carbolic acid spray in one of his earliest antiseptic surgical operations, circa 1865. Bettmann Archive hide caption

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Bettmann Archive

'The Butchering Art': How A 19th Century Physician Made Surgery Safer

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Brent Henderson harvests soybeans on his farm near Weona, Ark. "If it's going to be legal to use and neighbors are planting it, I'm going to have to plant [dicamba-tolerant soybeans] to protect myself," he says. "It's very annoying. ... My neighbor should not dictate what I do on my farm." Dan Charles/NPR hide caption

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Dan Charles/NPR

Cal Fire firefighter Trevor Smith battles the Tubbs Fire near Calistoga, Calif., on Thursday. Wildfires in Northern California have killed dozens of people and destroyed thousands of homes and businesses. Justin Sullivan/Getty Images hide caption

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