Space colonies?

Steven Hawking, the well-known British physicist/mathematician, stated this week that humanity should spread out to space colonies to avoid our extinction in this millenium, most likely from bioterrorism.
"I don't think the human race will survive the next thousand years unless we spread into space. There are too many accidents that can befall life on a single planet," Hawking told Britain's Daily Telegraph newspaper.

Hawking, Lucasian professor of mathematics at Cambridge University in England, said Armageddon threatened not in the form of a Cold War-style nuclear holocaust but could arrive in a more insidious and invisible form.

"In the long term, I am more worried about biology. Nuclear weapons need large facilities, but genetic engineering can be done in a small lab. You can't regulate every lab in the world," he said.

Timely, considering recent events...
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