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NASA issues research warning that makes end of world three times more likely
NASA issues research warning that makes end of world three times more likely,NASA scientist James Garvin says we've been under-estimating the sizes of impact craters on Earth, and that massive asteroids hit the planet much more often than previously believed

NASA issues research warning that makes end of world three times more likely

NASA scientist James Garvin says we’ve been under-estimating the sizes of impact craters on Earth, and that massive asteroids hit the planet much more often than previously believed