When I was a boy, I had a 'sleep over' at a friend's house. He was an only child and something of a prodigy. Even though he was only in the 7th grade, he was taking special classes where he was already learning algebra and chemistry. That night he told me all about a thesis he'd read by Carl Sagan called "Origins of Life." I didn't even know what a thesis was, but I listened, and he talked. That night an impression was made on the boy I was, and it had nothing to do with my brilliant little friend's lecture on Sagan's work. What made an impression, was that neither his mother or father ever came into his bedroom to kiss him goodnight.