That should come as some relief to the many worried Russians who want something done immediately, even though scientists say the explosion of a meteor over central Russia on Friday was a once-in-a-lifetime event. and European experts may be able to help with a few ideas that at first glance seem straight out of science fiction, including smashing spacecraft into asteroids, using the sun’s rays to vaporise them, or blasting them with nuclear bombs. Russia has found, to its cost, that it has no answers. The trail of a falling object is seen above a residential apartment block in the Urals city of Chelyabinsk, in this still image taken from video shot on February 15, 2013.
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