If looking at the Hubble’s deep field image full of thousands of galaxies isn’t enough to convince you there’s life out there, here’s another big hint. Space.com has an article up detailing how smaller, rocky, worlds very much like Earth may be filling the Milky Way:
“Small planets could be widespread in our galaxy, because they do not require a high content of heavy elements to form,” said study lead author Lars Buchhave, of the University of Copenhagen in Denmark.
“Knowing that the formation of rocky planets can occur in environments of lower metallicity than those of gas giants implies that there could be some places in the universe where rocky planets and life got an earlier start than did Earthlings,” Debra Fischer, an astronomer at Yale University, wrote in a commentary accompanying the study in the same issue of Nature.
So there are billions upon billions of planets out there, and now there may be a bunch of alien Earths in our own galaxy where life started a lot earlier than Earth? Yea, there’s no aliens out there. Impossible.