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Are human beings about to unleash a scientific nightmare? Right now, researchers are trying to create artificial superintelligence. It's a kind of machine that is more intelligent than a human being. But imagine a machine that's one thousand times smarter than the smartest human. Would that machine continue to carry out programmed tasks, or could that machine gain autonomy? Would we have something to fear if it did? Author James Barrat believes ASI is the great risk to our future, and he explains in this hour why he wrote the book Our Final Invention.