Last Updated: Tuesday, February 19, 2013, 14:01
Lasers powered by sun could protect Earth from any threatening-looking asteroids by destroying them before they can get too close, U.S. researchers have suggested.
Last Updated: Friday, February 15, 2013, 15:35
As an asteroid readies for a fly-by of Earth on Friday, two California scientists have proposed a system that could eliminate a threat of this size in an hour.
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