K1052
Elite Member
- Aug 21, 2003
 
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As was already mentioned:
When the premise itself is implausible it's a little distracting to the story.
Since there never seems to be any concern about radiation I think it can safely be assumed that some sort of impact event is responsible...an asteroid or more likely a comet (or possibly a number of comet fragments) based on the brief description in the book. Personally, I don't find that implausible since such events are linked to a number of mass extinctions.
Given the years that had passed and the condition of the environment I think that is the only force that could have accomplished it.
				
		
			
	