Huh; this exact scenario has been tossed around as a possible mass-extinction trigger. I wonder how often such a close approach happens. Mind, if in 1.4 milli

Huh; this exact scenario has been tossed around as a possible mass-extinction trigger. I wonder how often such a close approach happens. Mind, if in 1.4 million years, any beings that are our descendants in one way or another can't divert or destroy a piddly swarm of comets, they're just not trying.