The Deepwater Horizon Oil Spill, Two Years Later

On April 20, 2010, an explosion on the oil-drilling rig Deepwater Horizon caused the largest marine oil spill in US history, gushing nearly 5 million barrels of crude oil over the course of three months. In the two years since, researchers have been hard at work studying the impacts of the spill. See photos and read about some of the things they've learned about the oil spill's impact on pelicans, dolphins, and corals in this slideshow, and read more in this blog post. Even more about the Gulf oil spill can be found in our Gulf oil spill featured story.

Dark brown oil floods a marsh after the Deepwater Horizon oil spill.Pelicans Roost at oil spill "ground zero" two years later.Dolphins swimming among oily patches in the Gulf of MexicoA brittled star clings to damaged deep-sea corals in the Gulf of MexicoOil Drilling Platform in the Gulf of MexicoA scientist collects oil-laden "sand patties" on a Louisiana beach two years after the oil spill.