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 man Shelley, in very truth, is not entirely sane, and Shelley’s poetry is not entirely sane either. The Shelley of actual life is a vision of beauty and radiance, indeed, but availing nothing, effecting nothing. And in poetry, no less than in life, he is a beautiful and ineffectual angel, beating in the void his luminous wings in vain.””
—Matthew Arnold (1822–1888)