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					Originally Posted by polish_aristocrat  anyone here interested a little in this subject? 
from what I know, the chances for a big collision are minimal because they happen once every few millions years, but f.e chances for an impact similar in scale to the Tunguska Event  aren't that small..... | 
	
 Dont want to Scared you but they have already predict a collision in the next few century ! They have  already an eye on the asteroid!  Push your research on the nasa website and you will see!