RT @bigthink Stephen Hawking, Ray Kurzweil, Michio Kaku: Whose Idea Will Most Impact Our World - You Decide! http://bit.ly/pNjgOi
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RT @bigthink Stephen Hawking, Ray Kurzweil, Michio Kaku: Whose Idea Will Most Impact Our World - You Decide! http://bit.ly/pNjgOi