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Submission + - No black hole or magnetic monopole: Tunguska really was a meteor (nature.com)

davide-nature writes: The mysterious blast that flattened 2,000 square km of a remote Siberian forest in 1908 has been blamed on the most bizarre causes, such as an exotic elementary particle left over from the Big Bang, a black hole or, of course, aliens, including in the double-episode "Tunguska" of The X-Files. But a new analysis of tiny rock samples suggests that a more mundane explanation — a meteor exploding in the atmosphere — may be the right one.
The blast is estimated to have packed between 3 and 5 megatons, 10 times the energy of the meteor that exploded over Russia earlier this year.

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No black hole or magnetic monopole: Tunguska really was a meteor

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