Chinese scientists have come up with an ingenious alternative to nuclear obliteration for neutralising the threat of potentially Earth-shattering asteroids – staging a cosmic collision to knock the offending rocky mass off course.Ever since discovering that a 10km-diameter asteroid was most likely to blame for the extinction of the dinosaurs 66 million years ago, the world’s scientific community has been looking for ways to ensure the human race does not suffer the same fate.While Nasa has long…
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