Elon Musk opens virtual gym to train your robots

High-tech entrepreneur Elon Musk has launched an open-source training "gym" for artificial-intelligence programmers.
It's an interesting move for a man who in 2014 said artificial intelligence, or A.I., will pose a threat to the human race.
"I think we should be very careful about artificial intelligence," Musk said about a year and a half ago during an MIT symposium. "If I were to guess at what our biggest existential threat is, it's probably that... with artificial intelligence, we are summon