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We usually think of asteroid impacts as harbingers of mass extinction, but they might be the reason life exists on our planet at all. It's possible for bacteria to hitch rides on rocks ejected by space impacts and move from planet to planet. We know that certain Earth bacteria are capable of surviving the hostile conditions of space, but could they survive the impacts themselves? A group of scientists put them to the test, and we've got the results for you. More »
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