April 21, 2010: Fire boats battle the blaze on the Deepwater Horizon rig. U.S. Coast Guard/Getty Images hide caption

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Oobleck has some novel physical properties. When it's moved slowly, it acts smooth and runny, like a liquid. But move it quickly and forcefully, and it locks up, becoming almost solid. Jonathan Makiri/NPR hide caption

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Could Cornstarch Have Plugged BP's Oil Well?

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As the Deepwater Horizon oil rig burned last April, millions of barrels of oil were beginning to make their way out of the blown-out well underneath. U.S. Coast Guard/Getty Images hide caption

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Oil Spill Commission: Regulators Were 'Outmatched'

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This image, from a video feed from a remote submarine, shows BP's Macondo well leaking natural gas on May 12, 2010. A new study concludes that the vast quantity of methane gas that spewed from the well in the Gulf of Mexico was rapidly eaten by bacteria. BP PLC/AP hide caption

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Study Finds Bacteria Ate Most Methane From BP Well

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The Deepwater Horizon oil rig burns in the Gulf of Mexico last April. An excerpt of a presidential commission's probe into the rig explosion says risky decisions contributed to the disaster. Gerald Herbert/AP hide caption

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Panel Spreads Blame For BP Oil Rig Explosion

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Attorney General Eric Holder announces a civil lawsuit against BP and eight others in an effort to recover billions of dollars from the Gulf oil spill. At right is Environmental Protection Agency Administrator Lisa Jackson. Alex Wong/Getty Images hide caption

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Oysterman Mitch Jurisich steers a small boat around his family's oyster beds off the coast of Empire, La. He hasn't harvested many oysters since oil from the BP spill drifted into the area in June. Tamara Keith/NPR hide caption

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Oyster Businesses Still Plagued By Gulf Oil Spill

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Fred Bartlit Jr., chief investigator of the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling, at the public hearing in Washington, D.C., on Monday. J. Scott Applewhite/AP hide caption

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Oil Spill Panel Tells A Complicated Tale

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Boats battle a fire at the Deepwater Horizon oil rig in April. Eleven people were killed in the blast. U.S. Coast Guard/Getty Images hide caption

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Oil Spill Investigation A 'High Priority' For Justice

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Did Cement Or Concrete Fail In Oil Well?

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Panel: Tests Warned Of Cement Flaws Before Blowout

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Waves breaking on the shore in Orange Beach, Ala., leave behind an oily residue. Mayor Tony Kennon expects BP to restore the town's beaches to sugar white condition. Debbie Elliott/NPR hide caption

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Reminders Of BP's Oil Spill Linger Along Gulf Coast

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Oil Spill Legacy: 'Obama's Katrina'? Probably Not

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Report: Many Birds Still Face Threats From Gulf Oil

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Panel Blasts Government On Gulf Oil Spill Response

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Panel: White House Blocked Worst-Case Oil Figures

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Bayou Bienvenue in New Orleans is an example of south Louisiana’s wetland loss. Fifty years ago, this was a productive freshwater marsh with cypress and tupelo trees. Today, stumps are all that remain, as saltwater has encroached inland. Debbie Elliot/NPR hide caption

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La. Looks To New Plan To Restore Fragile Coast

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Retired Coast Guard Adm. Thad Allen testifies Monday before the commission investigating the Gulf of Mexico oil spill. Though Allen was the government's leader of the spill response, he acknowledged it was not always clear to the public who was in charge. Mark Wilson/Getty Images hide caption

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At Oil Spill Hearing, Calls For New Response Plan

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