Institute for Marine Mammal Studies veterinary technician Wendy Hatchett takes a skin sample from a dead bottlenose dolphin that was found on Ono Island, Ala., and brought for examination to Gulfport, Miss., on Tuesday. Patrick Semansky/AP hide caption

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Gulf Spill Investigated As Cause Of Dolphin Deaths

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Scientists hope to use a fungus to keep malaria-carrying mosquitoes like the Anopheles gambiae species from growing resistant to insecticides. Courtesy of James Gathany/CDC hide caption

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Fungus Knocks Out Malaria In Mosquitoes

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Kicking The Cigarette Habit A Global Challenge

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Not all young girls avoid dirt. Hannah Rose Akerley, 7, plays in a gigantic lake of mud at the annual Mud Day event in Westland, Mich., last July. Bill Pugliano/Getty Images hide caption

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Bill Gates' Goal: Get Rid Of Polio, Forever

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Microsoft founder Bill Gates, his wife Melinda French Gates and British Prime Minister David Cameron at the World Economic Forum on January 28, 2011, in Davos, Switzerland. Johannes Eisele/AFP/Getty Images hide caption

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Mixed Results For Portugal's Great Drug Experiment

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A Dutch man rides his bike by windmills in Kinderdijk, the Netherlands in 2007. Dutch researchers have found that the ability to ride a bike can help doctors distinguish between two similar forms of Parkinson's disease. Evert-jan Daniels/AP hide caption

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Paul Offit On The Anti-Vaccine Movement

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