technology is ever-changing, and changing ever faster. but what happens when the rate of technological change becomes so fast that the fundamental nature of what it means to be human changes, too?
npr's science friday talks with inventor, technologist and futurist ray kurzweil about the idea of 'the singularity' and what happens when technology advances so much that it's impossible to predict what happens next. will artificial intelligence, nanotechnology, and biotechnology be able to completely reshape what it means to be human?