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From SPACE.com:
If a big asteroid were streaking toward Earth and time were running out, a well-placed nuclear explosion could help humanity avert catastrophe — and not just in the movies.
A new study has injected new life into the old idea of dealing with a potentially threatening space rock by nuking it. The new analysis suggests that a nuclear blast could safely destroy even a relatively large asteroid. And astronauts wouldn't need to bore deep into the space rock, á la Bruce Willis and his crew in the movie "Armageddon," to implant the bomb. An explosion on the asteroid's surface would likely do the trick, scientists report.
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Re: Nuke-the-Asteroid Idea Revived to Protect Earth
