Obviously life on other planets? Life on earth is a friggin' miracle, a statistical anomaly that absolutely boggles the mind. The shows like Extraterrestial and Alien Planet are always interesting to watch, but there is no way that is happening or has happened.
Edit
rake equation for those without calculators. I've been fairly pragmatic(i.e. a little more hard-nosed than Drake) but I still can't get life to come up at an intelligent level.Have fun.
http://www.msnbc.com/modules/drake/default.asp