From Star Wars to Invasion of the Body Snatchers, you can watch these '70s sci-fi classics over and over again.

“I am afraid of my visions.” Thus spoke H.R. Giger, the artist whose paintings led to him being engaged by director Ridley Scott to design the xenomorph for the first Alien film in the late 1970s.

When the universe as we know it collapses, the only creatures with a chance of surviving to see the next age would be akin to Ridley Scott’s xenomorphs. Like the “Alien” franchise itself, they’re ...