Children play on a Nigerian oil-flow station in 2007. Nigeria, a major oil source for the United States, is riddled with ancient pipes and constant spills. That, plus the geopolitical challenges involved, is why much of Nigeria's crude is the kind of "tough oil" that author Michael Klare describes. George Osodi/AP hide caption

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Michael Klare: Grappling With The Age Of 'Tough Oil'

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Plaquemines Parish coastal zone director P.J. Hahn lifts an oil-covered pelican, which was stuck in oil at Queen Bess Island in Barataria Bay, just off the Gulf of Mexico, in early June. Gerald Herbert/AP Photo hide caption

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How Endangered Species Are Faring In The Gulf

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Inside A Psychopath's Brain: The Sentencing Debate

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In this photo illustration, bottles of Avandia diabetes medication are seen at Jack's Pharmacy on May 21, 2007, in San Anselmo, Calif. Justin Sullivan/Getty Images hide caption

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Diabetes Drug Poses Safety Test For FDA

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Fallon's brain (on the right) has dark patches in the orbital cortex, the area just behind the eyes. This is the area that Fallon and other scientists say is involved with ethical behavior, moral decision-making and impulse control. The normal scan on the left is his son's. Courtesy of Jim Fallon hide caption

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A Neuroscientist Uncovers A Dark Secret

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The looming storm could postpone BP's plans to double the amount of oil they capture from the spill. Here, a boat uses a boom and absorbent material to soak up oil on the surface of the water near Grand Isle, La., on Monday. Joe Raedle/Getty Images hide caption

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Stormy Weather Could Delay Oil Spill Cleanup Efforts

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Mary VanDam pours coffee for patron Jim Brumm at Mr. B's Pancake House in Laketon Township, Mich. Cory Morse/Muskegon Chronicle via AP hide caption

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Nervous About Alzheimer's? Coffee May Help

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Forget Hybrids; Make Your Own Electric Car

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Oil-soaked booms sit on top of a marsh in Barataria Bay. Brian Naylor/NPR hide caption

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Booms Delay The Inevitable; Cleanup Efforts Struggle

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New SETI Chief On Search For Extraterrestrials

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Magic Tricks Amuse Even In Extraordinary Times

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A shrimp-trawler gets a high-powered spray wash after spending a day skimming oil in the Gulf of Mexico. The Coast Guard has set up dozens of offshore decontamination stations like this one south of Mobile Bay. Debbie Elliot/NPR hide caption

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On The Gulf, Oily Ships Cleaned One At A Time

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The Next 'Geek?' We Asked. You Answered.

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Should Joints Be In The Medicine Cabinet?

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