With Well Capped, How Long Will The Oil Linger?

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Vertebrate Genomes Hide Ancient Viruses

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This composite image of brain scans shows two traits of a highly impulsive individual. The cool colors in the midbrain are indicative of a decrease in dopamine receptor levels while the warm colors show elevated levels of dopamine in a different part of the brain called the striatum. Joshua W. Buckholtz and David H. Zald hide caption

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Just Buy It: Impulsiveness Tied To Brain Chemical

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What's Changed In 20 Years Since ADA Passage

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A Pleurosigma, a type of phytoplankton in the ocean. Phytoplankton generate more than half of the Earth's oxygen. Harry Taylor/Nikon Small World hide caption

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The Food Chain's Weak Link: Tiny Ocean Plants Dying

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A flint-knapper makes sharp stone flakes by striking a flint "core" with a hammerstone. Human Origins Initiative hide caption

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A Handy Bunch: Tools, Thumbs Helped Us Thrive

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Exploring The Geology Of Gulf Oil

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Scientists Say A Gel Can Slow HIV Spread

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Why Do We Like What We Like?

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Feet On The Ground: Barefoot runners tend to land on the balls of their feet rather than on their heels the way most shoe-runners do. Rick Roeber went shoeless in 2003 and has clocked more than 13,000 barefoot miles since. Charlie Riedel/AP hide caption

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For Humans, Slow And Steady Running Won The Race

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Anthropologist Brian Richmond is trying to determine what the footprints of modern humans can tell us about how we evolved. NPR hide caption

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Fast Feet: A Springy Step Helps Humans Walk

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Sometimes, Good Parents Produce Bad Kids

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Baby Steps: Learning To Walk, The Hominid Way

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