I recently watched a documentary series by Stephen Hawking about the beginning and end of the Universe. This is serious “end times” stuff. And it isn’t very nice at all. We could be blasted by a passing giant asteroid (last time the dinosaurs went extinct, but this time it could destroy all life on Earth). Or a nearby star could explode in a supernova and finish us off… in fact it could already have happened, and its devastating shock waves could be heading towards us this very minute. Continue reading →