A car drives by a Switch data center in Las Vegas on Sept. 9, 2015. In 2013, data centers consumed 2 percent of all U.S. power — triple what they used in 2000. John Locher/AP hide caption

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Making The Cloud Green: Tech Firms Push For Renewable Energy Sources

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Yao honey hunter Orlando Yassene holds a male greater honeyguide temporarily captured for research in the Niassa National Reserve, Mozambique. The birds will flutter in front of people, tweet and fly from tree to tree to guide hunters to bees' nests that are hidden inside the trunks of hollow trees. This teamwork could date back thousands or even a million years. Claire Spottiswoode hide caption

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How Wild Birds Team Up With Humans To Guide Them To Honey

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Invisibilia: How A Shirt Collar Helped A Man Survive Auschwitz

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Research Provides New Insight Into The Evolution Of Human Microbes

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Earlier studies have found that children who grow up in houses with a TV on many hours a day learn fewer words than children in households with less TV time. Heleen Sitter/Getty Images hide caption

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New Words With Quieter Background Chatter

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The physical therapy workouts a rehabilitation facility offers can be a crucial part of healing, doctors say. But a government study finds preventable harm — including bedsores and medication errors — occurring in some of those facilities, too. Andersen Ross/Blend Images/Getty Images hide caption

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Grains, beads and bangles unearthed from dig sites in Banda, Ghana, tell of a time when droughts did not bring famine. (Above) Archaeologists Amanda Logan and Osei Kofi dig into the floor of a house from the 1500s. Courtesy of Ann Stahl/Northwestern University hide caption

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An anti-abortion demonstrator outside the U.S. Supreme Court in Washington, D.C., in March. Last month the high court struck down a Texas law that imposed tight regulations on abortion providers. Andrew Harrer/Bloomberg via Getty Images hide caption

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A heat-stressed koala is doused with water in December 2015 during an extreme heat wave in Adelaide, Australia. Last year was the hottest on record, but 2016 is on pace to supplant it at the top of the list. Every month of this year has set heat records. Morne de Klerk/Getty Images hide caption

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Scientists Report The Planet Was Hotter Than Ever In The First Half Of 2016

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NASA Scientists Predict Another All-Time Heat Record For 2016

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Hundreds Of Endangered Toads Released Into Southeast Wyoming

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