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:
“No self in the mass: the braver being,
The body that could never be wounded,
The life that never would end, no matter
Who died, the being that was an abstraction.”
—Wallace Stevens (1879–1955)