A typical hoverfly (Spilomyia diophthalma) Fredrik Sjöberg/Fredrik Sjöberg hide caption

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The Uppermost Aristocracy of the Hoverfly Society

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Wendy Chase directs the UConn Speech and Hearing Clinic. It provides help for transgender people working to change how they speak. Bret Eckhardt /Courtesy of Wendy Chase hide caption

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Helping Transgender People Find Their Voice

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Woman holding the dapivirine vaginal ring. Andrew Loxley/International Partnership for Microbicides hide caption

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The HIV Trap: A Woman's Lack Of Control

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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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