VIDEO OF THE DAY - What If? It's the end of the world as we know it. According to Discovery anyway...

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5 September 2008 12:00 GMT / By Ian Hughes

What if?

A question that most people will ask themselves quite regularly.

The Discovery Channel asked: "what if the Earth was hit by a 500km diameter meteor?"

The results are sobering, terrifying and strangely beautiful.

The Pink Floyd soundtrack is the final flourish that makes this "what if" scenario so strangely compelling.



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Comments

  • The chance of a 500km wide asteroid remaining undiscovered by now is extremely slim. However the real threat comes in a much smaller form. Even a space rock only 60 metres in diameter (more frequent and numerous) would be equivalent to a multi nuclear explosion. Tunguska, Siberia 1908, was one such and it flattened an area as large as greater London... and we don't not have the technology to track near earth objects smaller than 100 metres. Posted by David Fagan, Greece

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