How can three pounds of jelly inside our skulls enable us to do everything that makes us human? For centuries, scientists have been fascinated and puzzled by the mysterious workings of the brain. Now, for the first time, they can re-create in the computer the shapes of every one of the billions of nerve cells that make up our brains— the component parts of the intricate neural circuits that allow us to move, see and hear, to feel and to think.
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