The film's visual and narrative style influenced countless sci-fi and horror films. Alien's legacy is evident in its enduring popularity and numerous sequels, prequels, and adaptations.

What humans are doing to Earth may feel like a very modern anxiety, but issues like deforestation were being dealt with in science fiction in the early '70s with wonderful films like Silent Running.

Who needs a dose of super low budget, extra wacky fun science fiction from the 70s? Try this on for size ... Here's the retro trailer (+ two posters) for Michael Rae's sci-fi Laserblast, on ...