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:
“—No, no thou hast not felt the lapse of hours!
For what wears out the life of mortal men?
‘Tis that from change to change their being rolls;
‘Tis that repeated shocks, again, again,
Exhaust the energy of strongest souls
And numb the elastic powers.”
—Matthew Arnold (1822–1888)