How do you count the barrels of spilled BP oil in the Gulf?

Answers to your questions about the news.
June 21 2010 5:24 PM

100 Million Barrels of Oil in the Well, 100 Million Barrels of Oil

If one of those barrels should happen to spill ...

Read Slate's  complete coverage of the BP oil spill.

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Explainer thanks Tracy Hester of the University of Houston Law Center.

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Brian Palmer is Slate's chief explainer. He also writes How and Why and Ecologic for the Washington Post. Email him at explainerbrian@gmail.com. Follow him on Twitter.