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:
“You’ll have to learn that public life takes a lot of sweat; but it doesn’t need to worry you. You won’t always be right, but you mustn’t suffer from being wrong. That’s what kills people like us.”
—Franklin D. Roosevelt (1882–1945)