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:
“What is the foundation of that interest all men feel in Greek history, letters, art and poetry, in all its periods from the Heroic and Homeric age down to the domestic life of the Athenians and Spartans, four or five centuries later? What but this, that every man passes personally through a Grecian period.”
—Ralph Waldo Emerson (1803–1882)