Health workers in Nepal culled chickens and destroyed eggs following an outbreak of bird flu in Kathmandu in October 2012. Prakash Mathema/AFP/Getty Images hide caption

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Scientists Put An End To Moratorium On Bird Flu Research

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Two chimps groom each other at the Save the Chimps facility in Florida. The National Institutes of Health owns about 360 chimpanzees that aren't yet retired and that are living at research facilities; new guidelines say most of its chimps should be retired. Save the Chimps hide caption

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Rules Would Retire Most Research Chimps

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Hannah and Marty eat watermelon snacks at the Save the Chimps sanctuary. Save the Chimps hide caption

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Figuring How To Pay For (Chimp) Retirement

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You Can't See It, But You'll Be A Different Person In 10 Years

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Researchers at the U.S. Geological Survey National Wildlife Health Center in Madison, Wis., use eggs to see if the Asian strain of the H5N1 bird flu virus has entered the U.S. in this photo from 2006. Andy Manis/AP hide caption

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Research Moratoriums And Recipes For Superbugs: Bird Flu In 2012

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A health official culls chickens on a poultry farm in a village on the outskirts of Katmandu, Nepal. Chickens suspected of being infected with H5N1 bird flu were found in the area in October. Prakash Mathema/AFP/Getty Images hide caption

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A prefectural officer carries a chicken on a poultry farm on Oct. 15 on the outskirts of Kathmandu, Nepal, where chickens suspected of being infected with bird flu were found. Prakash Mathema /AFP/Getty Images hide caption

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NIH Revisits Debate On Controversial Bird Flu Research

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The Mariner 2 probe at an assembly facility in Cape Canaveral, Fla., on Aug. 29, 1962. NASA/JPL/Caltech hide caption

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50 Years After First Interplanetary Probe, NASA Looks To Future

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Cmdr. Eugene Cernan tests the lunar vehicle on the surface of the moon during the Apollo 17 mission. NASA hide caption

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Is Another Moon Mission Written In The Stars?

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Can You Tell Emotion From Faces Alone? A new study suggests that when people evaluated just facial expressions — without cues from the rest of the body — they couldn't tell if the face was showing a positive or negative emotion. Enlarge this photo to see the answers. Hillel Aviezer/The Hebrew University of Jerusalem hide caption

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Victory Or Defeat? Emotions Aren't All In The Face

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William Beal, standing at center, started a long-term study on seed germination in 1879. He buried 20 bottles with seeds in them for later researchers to unearth and plant. Michigan State University hide caption

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Experiments That Keep Going And Going And Going

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Koshi, an elephant, makes sounds that imitate Korean words. Stoeger, et. al./Current Biology hide caption

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Move Over, Parrot: Elephant Mimics Trainer At Zoo

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An artist's impression shows a planet, right, orbiting the star Alpha Centauri B, center, a member of the triple star system that is the closest to Earth. ESO/L. Calcada/AP hide caption

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Scientist Find Nearest Planet Outside Solar System

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