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:
“One perceives that again and again she has destroyed her life when it was forming into shapes of happiness because of her loyalty to the early misery, her conviction that that has the sanction of ultimate reality, and that beside it all other things are trivial.”
—Rebecca West (1892–1983)