th (1)An explosion and fire on a BP oil rig off the coast of Louisiana killed 11 workers and sent nearly 200 million gallons of oil plunging into the ocean four years ago, causing lasting and unforeseen negative environmental effects. While the true, immediate effects of the BP spill were mostly kept hush-hush by the oil industry, today, science continues to unveil the environmental impacts caused by the largest oil spill in U.S. history. Research presented on October 27 and published in the Proceedings of the National Academy of Science said approximately 10 million gallons of oil has coagulated and settled on the bottom of the seafloor below the scene of the explosion, creating a kind of oily bathtub ring. More