The four more likely places to host alien life in the Solar System

NASA's astronomy picture of the day is nothing especial today. At least for more people. For me it is special because I like to look at the four moons that tantalize Earth scientists with the possibility of life—four moons that we should explore soon, shown here to scale. So beautiful, they never get old. » 9/19/14 7:17am 9/19/14 7:17am