Steven Spielberg’s fourth film about alien encounters is “Disclosure Day,” following “ET: The Extra-Terrestrial,” “War of the Worlds,” and “Close Encounters of the Third Kind.” That inspired us to take another look at what Roger Ebert thought about some of the most famous and infamous alien movies,

The '90s had plenty of beloved alien movies, but this obscure gem starring Charlie Sheen is a great addition for Prime Video subscribers hungry for more sci-fi.

From the mystery of Cloverfield's Clover to the changing fury of the alien xenomorph, these are the best and most memorable monsters in sci-fi movies.