Oscar Pistorius of South Africa runs in the men's 200-meter event at the Paralympic World Cup in May. Some observers have suggested Pistorius receives an unfair advantage from his carbon-fiber "blade" legs. Michael Steele/Getty Images hide caption

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Studying Oscar Pistorius: Does The 'Blade Runner' Have An Advantage? [Video]
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Ask An Astrophysicist
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Sally Ride, Pioneer
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"Resilience" Looks At How Things Bounce Back
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Building Organs, On One Microchip At A Time
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Why Science Is A Non-Issue In The Election...Again
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Timothy Ray Brown, shown in May 2011 with his dog Jack in San Francisco, is the only man ever known to have been fully cured from AIDS. Brown is known as the "Berlin patient" because he had a bone marrow transplant in a German hospital five years ago. Eric Risberg/AP hide caption

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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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Can You Help Me Tie My Shoe? Researchers found that when study participants were asked an unusual request, they were more likely later on to perform a favor. iStockphoto.com hide caption

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Unraveling The Genetic Code That Makes Us Human
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Its Budget Sunk, Undersea Lab May Have To Surface
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Melting The World's Biggest Ice Cube
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Getting High: Physics Of The Fosbury Flop
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Sniffing Out The Science Behind Sports Doping
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