I was crying by the end of this video too. But I think it was more because I found a Snickers bar in the pocket of my other pair of Thunder Cats pajamas. Then right when he says (SPOILER ALERT!!!!) 'We are one planet.' some of my beard got stuck under the space bar.
Carl Sagan died in 1996 when an angry russian dropped an atomic bomb on his house. Of course, the bomb didn't actually detonate. It just fell on his house and crushed him.