Death Valley's half-mile-wide Ubehebe Crater turns out to have been created 800 years ago -- far more recently than generally thought. Credit: Brent Goehring/Lamont-Doherty Earth ObservatoryIn California's Death Valley, death is looking just a bit closer. Geologists have determined that the half-mile-wide Ubehebe Crater, formed by a prehistoric volcanic explosion, was created far more recently than previously thought—and that conditions for a sequel may exist today.
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