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Scientists have long been puzzled by what caused a sudden cooling of up to 8C (14F) just as the Earth was warming up at the end of the last ice age. The change in climate caused retreating glaciers to advance once again, and coincided with the extinction of 35 families of North American...

don't think that silly things anymore the world will not come to the end 2011 2012 are just common years like 2009 and 2010

when i was in middle school i started have interest in UFO.because this thing is full of mystery that's why i am curious about it