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:
“Seeing to it that a youngster grows up believing not just in the here and now but also in the grand maybes of life guarantees that some small yet crucial part of him remains forever a child.”
—Anne Cassidy (20th century)