Of the million or so Americans a year who get sepsis, roughly 300,000 die. Unfortunately, many treatments for the condition have looked promising in small, preliminary studies, only to fail in follow-up research. Reptile8488/Getty Images/iStockphoto hide caption

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Reptile8488/Getty Images/iStockphoto

Researchers used online data to model the vaccination rate in communities affected by an outbreak of mumps in Arkansas. Maimuna Majumder/HealthMap; Alyson Hurt/NPR hide caption

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Maimuna Majumder/HealthMap; Alyson Hurt/NPR

A baby receives the rotavirus vaccine during a clinical trial in Niger. The new vaccine is the first designed specifically for children in sub-Saharan Africa. It doesn't require refrigeration and will be cheaper than ones currently available. Krishan Cheyenne/MSF hide caption

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Krishan Cheyenne/MSF

Scientists have developed a smartphone app to measure sperm count at home. Hadi Shafiee/Brigham and Women's Hospital, Harvard Medical School hide caption

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Hadi Shafiee/Brigham and Women's Hospital, Harvard Medical School

A kea parrot picks at the antenna of a vehicle in New Zealand. Ullstein Bild/ullstein bild via Getty Images hide caption

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Ullstein Bild/ullstein bild via Getty Images

The researchers play a recorded "play call," setting off a play bout between two kea parrots.

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Embryoids like this one are created from stem cells and resemble very primitive human embryos. Scientists are studying them in hopes of learning more about basic human biology and development. Courtesy of Rockefeller University hide caption

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Courtesy of Rockefeller University
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Ketamine For Severe Depression: 'How Do You Not Offer This Drug To People?'

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The American Iron and Steel Institute is one of the trade groups that wants Congress to undo the stronger safety regulation enacted in 2016 by the Occupational Safety and Health Administration. michal-rojek/Getty Images/iStockphoto hide caption

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michal-rojek/Getty Images/iStockphoto

Congress May Undo Rule That Pushes Firms To Keep Good Safety Records

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Graveyard of Staghorn coral, Yonge reef, Northern Great Barrier Reef, October 2016. Greg Torda /ARC Centre of Excellence for Coral Reef Studies hide caption

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Greg Torda /ARC Centre of Excellence for Coral Reef Studies

The South American polka dot tree frog was recently found to glow fluorescent under ultraviolet light. Julián Faivovich and Carlos Taboada (Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"—CONICET) hide caption

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Julián Faivovich and Carlos Taboada (Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"—CONICET)

A tardigrade, known as a water bear, is shown magnified 250 times. These tiny aquatic invertebrates can go without water for 10 years, surviving as a dessicated shell. Steve Gschmeissner/Getty Images hide caption

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Steve Gschmeissner/Getty Images

How One Of The World's Toughest Creatures Can Bring Itself Back To Life

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Study Finds High Temperatures Killing Large Parts Of Great Barrier Reef

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A colored magnetic resonance imaging (MRI) scans of the brain of a 76-year-old patient with dementia shows the brain has atrophied and the dark brown fluid-filled spaces have become enlarged. Zephyr/Science Source hide caption

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Zephyr/Science Source

Cancer Drug That Might Slow Parkinson's, Alzheimer's Headed For Bigger Tests

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Go Ahead, Eat It. Scientist Affirms 5-Second Rule

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An artist's impression of a white dwarf in an extremely close orbit around what's believed to be a black hole. The star is so close that much of its material is being pulled away. X-ray: NASA/CXC/University of Alberta/A.Bahramian et al.; Illustration: NASA/CXC/M.Weiss hide caption

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X-ray: NASA/CXC/University of Alberta/A.Bahramian et al.; Illustration: NASA/CXC/M.Weiss

Researchers Examine Breitbart's Influence On Election Information

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Why Piling On Facts May Not Help In The Battle Against Fake News

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NASA astronaut Kate Rubins floats in the International Space Station in September 2016, wearing a spacesuit decorated by patients recovering at the MD Anderson Cancer Center. NASA Johnson/Flickr hide caption

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NASA Johnson/Flickr

A Microbe Hunter Plies Her Trade In Space

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