10,000 Year Clock Challenges Approach To Time
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In Jiaonan county, the Qi wall incorporates outcrops of bedrock. Linda Nicholas/The Field Museum hide caption

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Centuries Before China's 'Great Wall,' There Was Another
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The most abundant meteorites found in Antarctica are called chondrites. They are some of the oldest objects known in the solar system. Katherine Joy/Antarctic Search for Meteorites Program / Case Western Reserve University hide caption

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The Hunt For Meteorites Begins In Antarctica
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Easter Island's Secret May Be Adaptation, Not Suicide
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A newly discovered neural circuit in the brain of the common fruit fly seems to serve as a sort of "volume control," turning up and down the perception of sound and light. Nicholas Monu/iStockphoto hide caption

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Can A Fruit Fly Help Explain Autism?
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A technique called optogenetics is being used in the laboratory to observe and control what brain circuits are doing in real time. Henning Dalhoff/Getty Images/Science Photo Library RM hide caption

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Experimental Tool Uses Light To Tweak The Living Brain
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Are We Genetically Inclined To Be Materialistic?
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There's data to support the notion that pot, or a drug based on its active ingredient, could help ease the fears of PTSD. Ted S. Warren/AP hide caption

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Could Pot Help Veterans With PTSD? Brain Scientists Say Maybe
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Do Crossword Puzzles Really Stave Off Dementia?
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Research excavations like these in Siberia's Denisova Cave are yielding clues to the mating choices of early hominids. Bence Viola/Nature hide caption

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Mixing It Up 50,000 Years Ago — Who Slept With Whom?
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Study: Cats May Have First Cuddled Up With People 5,300 Years Ago
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Is The Primary System To Blame For Partisanship?
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Kansas City Chiefs linebacker Jovan Belcher's body has been exhumed more than a year after he killed his girlfriend and himself so that his brain can be examined for signs of a degenerative condition linked to repeated concussions. Seth Perlman/AP hide caption

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A simulated patient at the University of Malaya makes use of different materials to mimic the look and feel of human tissue. /Courtesy of Vicknes Waran hide caption

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