Cows graze at a Horizon Organic farm in eastern Maryland. Even though the milk produced here is deemed organic, a very small percentage of corn used to feed the animals may contain genetically modified material because of unavoidable cross-pollination between genetically modified corn and the organic variety. Keri Pickett/Horizon hide caption

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A Growing Debate: How To Define 'Organic' Food
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'3-Weed Note' Artwork by Patterson Clark - alienweeds.com Courtesy of Patterson Clark hide caption

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Patt Clark on Asiatic Bittersweet
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A solitary bison in Yellowstone National Park. Amelia Templeton/NPR hide caption

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Back To Tradition, Bringing Home The Bison
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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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Bilingual Babies More Perceptive To Nonnative Tongues
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Oscars Accessory Checklist: Handbag, Heels, Hybrid
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Oil spill claims czar Kenneth Feinberg speaks about the claims process Feb. 18 at the Mississippi College Law Review Symposium in Jackson, Miss. Feinberg faces criticism from Gulf Coast residents about the slow pace and low amount of payments. Rogelio V. Solis/AP hide caption

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On Gulf Coast, Frustration At BP Claims Process
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Researchers aboard the Atlantis, a research vessel operated by the Woods Hole Oceanographic Institution, examine core samples brought up from the sea floor of the Gulf of Mexico by the deep-sea submersible Alvin on Nov. 24, 2010. The scientific community is conflicted about the lack of direction, coordination and funding in studying the aftermath of the Gulf of Mexico oil spill. Richard Harris/NPR hide caption

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'Fog Of Research' Clouds Study Of Oil's Effects In Gulf
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A giant clam and healthy coral reef on the east side of Palau. The coral reefs of Palau are part of a massive interconnected system that ties together Micronesia and the Western Pacific. Ian Shive/World Resources Institute hide caption

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World's Coral Reefs Facing Serious Threats
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A house in Phoenix outfitted with the solar panels that SolarCity leases to its customers. Courtesy of SolarCity hide caption

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A Lease On Solar Panels? Some States Pitch In
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