Most Helpful Girl
Yes. I think I remember reading about the signs of life on one of the other planets while in astronomy class. Can't remember which though.1
Most Helpful Guy
Yes. Because there are people on the ISS.
This is the Hubble Ultra Deep Field. Each spot (except for the twinkly looking foreground star on the right) is an entire galaxy, and there are about 10,000 of them in the image. This image constitutes about one thirteen-millionth of the entire sky. Whether or not we can extrapolate that out (and we don't really know if we can), that's a whole lot of galaxies.
It's practically a mathematical certainty that whatever happened here for life to begin has happened elsewhere. Unless God put us here and put nothing anywhere else, in which case... oh well lol1