Episode Detail: Life's Really Big Questions - Scientific American Frontiers
Host Alan Alda asks scientists some of life's really big questions. Among them: What caused life to become “interesting” enough to lead to humans? What makes us human? Will robots ever outgrow their need for us? Are we alone in the universe? The answers: Not so fast. “Big questions don't always have answers,” Alda chuckles. “That's what makes them big.” But there are suppositions, including a “biological big bang” some 600 million years ago.
