Stephen Hawking: Mad scientists could kill us all – that’s why we need space colonies

British physicist Stephen Hawking says we need to colonize other worlds because humanity will almost certainly face a disaster on Earth sometime in the next few millennia – perhaps a disaster of our own making.

Among the risks he outlined in a report from the BBC are nuclear war, climate change and genetically engineered viruses. What’s more, he said further progress in science and technology will bring "new ways things can go wrong."

by Alan Boyle

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