Extraterrestrial life has been theorized to exist for centuries. From planets and moons within our own solar system, to planets orbiting in other star systems spread across the galaxy, the thought of alien life has fueled both science fiction and science fact. But is there really life out there somewhere or is it just us here on planet Earth?
Aliens in Science Fiction
Aliens have been written about in science fiction since True History by Lucian of Samosata was published in the second century BCE. Today, many science fiction movies and novels paint a picture of Earthlings and aliens living and working together to achieve common goals. Star Trek, Star Wars, Babylon 5, Farscape, among others give us some ideas of what aliens may look like, how they may interact, how they live within their civilizations, and how our civilization would benefit from these friendships.