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:
“My life has crept so long on a broken wing
Through cells of madness, haunts of horror and fear,
That I come to be grateful at last for a little thing.”
—Alfred Tennyson (1809–1892)