Robots are narrowing the gap with humans

Thanks to exponential increases in computer power — which is roughly doubling every two years — robots are getting smarter, more capable, more like flesh-and-blood people. Matching human skills and intelligence, however, is an enormously difficult — perhaps impossible — challenge. Nevertheless, robots guided by their own computer "brains'' now can pick up and peel bananas, land jumbo jets, steer cars through city traffic, search human DNA for cancer genes, play soccer or the violin, find earthquake victims or explore craters on Mars.