It's a law of nature - you never see the BIG event coming! Humans prattle on about largely inconsequential things (so called global warming; holes in ozone layer; horse meat; etc), but nature smiles and does its own thing. A lesson to the anti-nuclear/anti-progress lobby. They make a song and dance about inconsequential levels of radiation, yet nature bombards us with it constantly, and sets off the equivalent of a nuke over our heads without any warning. One day it will be more than an odd few tons of rock and poof - we'll all go the way of the dinosaurs! So they'd better start their protest campaign agin nature right now. Though they would do well to note that the only way we will ever have a tiny chance of escaping is if we intelligently pursue a nuclear future.