A History of Short Words

From the New York Times Crossword Puzzle

ALIENS

Tue, 26 Dec '23
U.F.O. crew
Sat, 7 Oct '23
Weaver's work?
Tue, 12 Jul '22
Many characters in "Guardians of the Galaxy"
Tue, 12 Apr '22
Ones potentially contacted in "first contact"
Sun, 17 Oct '21
Their existence is debatable
Mon, 18 Jan '21
1986 sci-fi sequel set in deep space