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:
“There’s night and day, brother, both sweet things; sun, moon, and stars, brother, all sweet things; there’s likewise a wind on the heath. Life is very sweet, brother; who would wish to die?”
—George Borrow (1803–1881)