Hmm... not sure what to make of the "global killer" situation. It's a lot of years though and I'd find it hard to beleive that technology wouldn't exist that could deflect such an object enough to miss us. The danger is very real in its innevitability, but there's always people claiming the end is near. After centuries and centuries of forecasting apocalypse it's really starting to look silly when they're never right. Precautions for such events are certainly important, but personally I'd be mo…