June 8, 2010 8:24 PM

NOAA confirms oil floating beneath Gulf's surface

Researchers confirmed Tuesday that oil is floating as deep as 3,300 feet below the surface of the Gulf of Mexico in layers that may pose unprecedented challenges to efforts to clean up the effects of the spewing BP Deepwater Horizon well. The head of NOAA in mid May had denounced scientists' claims of the subsurface oil's presence.

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