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:
“The feeling about a soldier is, when all is said and done, he wasn’t really going to do very much with his life anyway. The example usually is: “he wasn’t going to compose Beethoven’s Fifth.””
—Kurt Vonnegut, Jr. (b. 1922)