Science fiction is horror’s cousin. While sci-fi is not above dealing with nail-biting suspense, as evident by The Terminator, or doing graphic violence like in Robocop, but it is not horror just because of a few similarities. Horror and Sci-Fi do directly cross paths sometimes though, and out of that union comes the subgenre of sci-fi/ horror. These films often deal with terror in scientific trappings. With the release of Ridley Scott’s Prometheus, the prequel to Scott’s own Alien, we felt like it is the perfect time to take a look at the 10 very best of sci-fi/ horror.