Joining John B. Wells, scientist and mathematician John Casti discussed human-caused catastrophic scenarios that could quickly bring about the end to our way of life.

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  1. Tsvetelina YordanovaJuly 11, 2012 at 9:35 AM

    Amazon Review:
    http://www.amazon.co.uk/X-Events-Collapse-Everything-John-Casti/dp/0062088289/ref=sr_1_1?ie=UTF8&qid=1341988253&sr=8-1

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