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:
“Every time an ashtray is missing from a hotel, they don’t come looking for you. But let a diamond bracelet disappear in France and they shout John Robie, the Cat. You don’t have to spend every day of your life proving your honesty, but I do.”
—John Michael Hayes (b.1919)