A Pleurosigma, a type of phytoplankton in the ocean. Phytoplankton generate more than half of the Earth's oxygen. Harry Taylor/Nikon Small World hide caption

itoggle caption Harry Taylor/Nikon Small World

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

itoggle caption Joe Raedle/Getty Images

The chief government spokesperson on the oil spill, Coast Guard Adm. Thad Allen, often speaks with great authority. Trouble is, he's bungled a lot of the facts. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images