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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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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NPR interns (from left) Angela Wong and Kevin Uhrmacher participate in an experiment to induce brain freeze. Benjamin Morris/NPR hide caption

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Joe Palca's perfectly toasted marshmallow. Maggie Starbard/NPR hide caption

itoggle caption Maggie Starbard/NPR
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Scott O'Neill wants to rid the world of dengue fever by infecting mosquitoes with bacteria so they can't carry the virus that causes the disease. Benjamin Arthur for NPR hide caption

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Bo Van Pelt celebrates his hole-in-one during the final round of the Masters on April 8. New research suggests that golfers may be able to improve their games by believing the hole they're aiming for is larger than it really is. Andrew Redington/Getty Images hide caption

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The last lunar eclipse of 2011 as seen from the San Gabriel Valley east of Los Angeles on Dec 10, 2011. Frederic J. Brown/AFP/Getty Images hide caption

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The Messenger spacecraft is depicted over the Calvino Crater on Mercury in this enhanced-color image of the planet's surface. NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington hide caption

itoggle caption NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington

Astronauts may have a particular affinity for Tabasco sauce in space because their sense of smell and taste is distorted. John Rose/NPR hide caption

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