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:
“... the great mistake of the reformers is to believe that life begins and ends with health, and that happiness begins and ends with a full stomach and the power to enjoy physical pleasures, even of the finer kind.”
—Katharine Fullerton Gerould (1879–1944)