Mother Nature Network:
On April 20, 2010, the British Petroleum Deepwater Horizon drilling rig exploded in the Gulf of Mexico, killing 11 men and releasing as much as 5 million barrels of crude oil into the sea. It is believed that as many as 53,000 barrels of oil a day flowed from the broken well until BP was able to stem the release on July 15, 2010. It was the biggest offshore spill in U.S. history. But perhaps one of the more disturbing aspects of the Deepwater Horizon oil spill was the cleanup.