The only known life in this Galaxy and Universe exists here on Earth.
Coulda, Woulda, Crap Speculative Nonsense.
There is no life on Europe, there is no life on Titan, there is no life on Mars.
You people need to get this through your thick heads already.
There is barely any life here on earth at the poles, so there isn't gonna be any life out in our Solar System.
Life doesn't always find a way, if it did, then mountains would be covered in Trees, but they aren't, there is a tree line, and above that, there isn't any life, so there isn't life in radiation soaked outer space.
The 'native' americans owned lots of slaves and also made blood sacrifices to their gods. Enemies who lost were captured and later had their hearts ripped out of their chests while they were still alive.