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Scientists find that rice grown under elevated carbon conditions loses substantial amounts of protein, zinc, iron and B vitamins, depending on the variety. Maximilian Stock, Ltd./Getty Images/Passage hide caption

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Maximilian Stock, Ltd./Getty Images/Passage

An artist's rendering of the Chicxulub impact crater on Mexico's Yucatan Peninsula from an asteroid that slammed into the planet some 65 million years ago. SPL/Science Source hide caption

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SPL/Science Source

Asteroid Impact That Wiped Out The Dinosaurs Also Caused Abrupt Global Warming

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An employee of the U.S. government in Guangzhou, China, has reported mysterious symptoms similar to those experienced by State Department employees in Cuba. Here, the U.S. Consulate in Guangzhou. U.S. Department of State hide caption

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U.S. Department of State

Patients in the study had "significantly lower out-of-pocket costs — on the average, $500 — when they visited a physical therapist first," says Bianca Frogner, a health economist at the University of Washington. PeopleImages/Getty Images hide caption

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PeopleImages/Getty Images

Trying Physical Therapy First For Low Back Pain May Curb Use Of Opioids

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California is starting to push hospitals throughout the state to lower their rates of medically unnecessary C-sections. Thanasis Zovoilis/Getty Images hide caption

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Thanasis Zovoilis/Getty Images

Scientists have videotaped sharks traveling a 500-mile-long "shark highway" in the Pacific Ocean. Andy Mann/Waitt Foundation/Pacifico hide caption

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Andy Mann/Waitt Foundation/Pacifico

Scientists Take A Ride On The Pacific's 'Shark Highway'

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Environmental Protection Agency Administrator Scott Pruitt announcing his decision in April to scrap Obama administration fuel economy standards. Andrew Harnik/AP hide caption

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Andrew Harnik/AP

Nothing Certain In Search For 'Regulatory Certainty' At EPA

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DNA isolated from a small sample of saliva or blood can yield information, fairly inexpensively, about a person's relative risk of developing dozens of diseases or medical conditions. GIPhotoStock/Cultura RF/Getty Images hide caption

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GIPhotoStock/Cultura RF/Getty Images

Laura Ogden, Jack Hannan, and Dr. Jones the dog. Courtesy of Laura Ogden hide caption

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Courtesy of Laura Ogden

Rewinding & Rewriting: The Alternate Universes in Our Heads

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The Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) mission, shown in an artist's rendering, will measure tiny fluctuations in Earth's gravitational field to show how water moves around the planet. NASA/JPL hide caption

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NASA/JPL

NASA Launching New Satellites To Measure Earth's Lumpy Gravity

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Mike Stone, left, and Andy Sherman in the pumping station for Hannibal, Mo., during a flood in 1993. The city has since constructed a flood wall, and flood managers have built up levees to protect against flooding. But scientists warn those structures are making flooding worse. Cliff Schiappa/AP hide caption

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Cliff Schiappa/AP