My jaw hit the floor tonight watching a 60 Minutes segment on the emerging neuroscience of brain-only computer interfaces. In the clip, see how a completely paralyzed man, who could otherwise only communicate by moving his eyes, uses his mind to type out thoughts on a computer screen. Neuroscientists have even gotten as far as to embed a chip inside a monkey’s brain, and figured out what brain activity signals that the monkey is trying to move its arm in what direction.