In popular cultures, "Extraterrestrials" are life forms — especially intelligent life forms— that are of extraterrestrial origin (often also called "aliens").
Famous quotes containing the word life:
“A real life, a life that leaves a deposit in the shape of something alive.... It’s difficult to say what makes a life a real life.... You could also say it depends on a person being identical with himself.”
—Max Frisch (1911–1991)