BP oil spill

Associated Press
FILE - In this Tuesday, Feb. 1, 2011 file picture, BP PLC's CEO Bob Dudley pauses during a results media conference at their headquarters in London. BP is not fully past the Deepwater Horizon disaster, the 2010 explosion that killed 11 workers and led to the largest oil spill in U.S. history. The company has so far set aside $42 billion to pay fines and damages resulting from the spill, and that amount may yet grow. Paying for the spill has forced BP to change. Under Bob Dudley, who became CEO in October 2010, BP has been selling smaller assets while holding onto promising large resources that it hopes to exploit with its expertise in developing large projects. (AP Photo/Alastair Grant)

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The BP oil spill left an oily "bathub ring" on the sea floor that's about the size of Rhode Island, new research shows.

The study by David Valentine, the chief scientist on the federal damage assessment research ships, estimates that about 10 million gallons of oil coagulated on the floor of the Gulf of Mexico around the damaged Deepwater Horizons oil rig. (AP)

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