Bill Gates, Stephen Hawking Say Artificial Intelligence Represents Real Threat

I worry about a lot of things — my health, my kids, and the size of my retirement account. I never worry about an impending robot apocalypse ... but maybe I should. A handful of very smart people in the science and technology worlds are worried about that very thing.
First it was Microsoft cofounder Bill Gates, who got the Internet all fired up when he answered questions in a Reddit "AskMeAnything" thread.
"I am in the camp that is concerned about super intelligence," Gates wrote in respo