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320 pages, Paperback
First published January 1, 2005
The United States has a supervolcano, and three million tourists blithely visit it every year, where they picnic on top and take pictures of bears. Beneath their sneakered feet Yellowstone National Park has built up a seething chamber of magma almost the size of the park itself. If Yellowstone blows, [like it did 620,000 years ago], it could bury half the United States in several feet of ash, instigate a volcanic winter, and push us all to the brink of extinction. Subterranean fire may just be the death of us all. This is knowledge, I realise, that I'd rather have done without.