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:
“When I think of this life I have led; the desolation of solitude it has been; the masoned, walled-town of a Captain’s exclusiveness, which admits but small entrance to any sympathy from the green country without—oh, weariness! heaviness! Guinea-coast slavery of solitary command!”
—Herman Melville (1819–1891)