Its the start of a military revolution. Now its looking at me. Machines operating on their own. It recognized you instantly. Using Artificial Intelligence to make decisions faster than humans, and raising questions the pentagon is only beginning to grapple with. So, if the machines better, why not let it make the decision . This goes to the ethics of the question of whether or not you allow a machine to take a human life without the intervention of a human. I would say at this point, i am certain. Certain . Yeah. Thats a rare thing to say, for a prediction for a scientist, and im willing to say it. You do know how mindboggling this sounds . I mean, a new planet hasnt been discovered for 170 years. I believe you think it looks like this animation over my shoulder here . We think that its somewhere between ten and 20 times more massive than the earth. Im steve kroft. Im leslie stahl. Im bill whitaker. Im david martin. Im scott pelley. Those stories, tonight on 60 minutes. We live in a pi