A replica of the pinky bone fragment found in a Siberian cave. Researchers used the bone bit to extract and sequence the genome of a girl who lived tens of thousands of years ago. Max Planck Institute for Evolutionary Anthropology hide caption

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Pinky DNA Points To Clues About Ancient Humans

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Roger Angel, an astronomer at the University of Arizona, stands in front of his new project: a solar tracker. Angel wants to use the device to harness Arizona's abundant sunlight and turn it into usable energy. Jason Millstein for NPR hide caption

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Telescope Innovator Shines His Genius On New Fields

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In this photo released by SkyandTelescope.com, a Perseid meteor flashes across the constellation Andromeda on Aug. 12, 1997. Rick Scott and Joe Orman/AP hide caption

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Summer Science: What's A Meteor Shower?

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Adam Steltzner, the leader of the rover's entry, descent and landing engineering team, cheers after Curiosity touched down safely on Mars on Sunday. Bill Ingalls/NASA/Getty Images hide caption

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So You Landed On Mars. Now What?

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Curiosity Is On Mars, Now What?

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NASA's Curiosity Lands On Red Planet

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An artist's concept of NASA's Mars Science Laboratory spacecraft depicts the final minute before the rover, Curiosity, touches down on the surface of Mars. NASA/JPL-Caltech hide caption

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Waiting For A Sign: Mars Rover To Land On Its Own

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Anxiety Hovers Over Rover's Mars Landing

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Mars Rover Will Look For Building Blocks Of Life

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NASA engineer Adam Steltzner led the team that designed a crazy new approach to landing on Mars. Rachael Porter for NPR hide caption

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Crazy Smart: When A Rocker Designs A Mars Lander

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United States runner Kam Conley sheds layers to train for the Olympics in England on Monday. Less clothing means more evaporation, keeping athletes cooler. Hussein Malla/AP hide caption

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Summer Science: Clothes Keep You Cool, More Or Less

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The Space Trip That Made Sally Ride A Folk Hero

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Joe Palca serves up some hot tea on a very hot day at Teaism in Washington, D.C., last week. Maggie Starbard/NPR hide caption

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Cool Down With A Hot Drink? It's Not As Crazy As You Think

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