In 2013, a 60-foot-wide meteor exploded over Russia, and no one saw it coming. The Chelyabinsk impactor was relatively small by interplanetary standards, but the blast injured about 1,500 people and damaged 7,000 buildings. If a larger rock were headed for Earth, how would we defend ourselves? The short answer is, scientists aren’t really sure, but one solution sounds a lot like the plot from a 1998 Michael Bay movie: just nuke ‘em.
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