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Once confined to fantasy and science fiction, time travel is now simply an engineering problem.
MICHIO KAKU, Wired Magazine, Aug. 2003
It would take a civilization far more advanced than ours, unbelievably advanced, to begin to manipulate negative energy to create gateways to the past. But if you could obtain large quantities of negative energy -- and that's a big "if" -- then you could create a time machine that apparently obeys Einstein's equation and perhaps the laws of quantum theory.
MICHIO KAKU, Scientific American, Nov. 24, 2003
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