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:
“For the soldier of time, it breathes a summer sleep,
In which his wound is good because life was.
No part of him was ever part of death.
A woman smoothes her forehead with her hand
And the soldier of time lies calm beneath that stroke.”
—Wallace Stevens (1879–1955)