Are we alone in space? Are there other civilizations on other planets? The Milky Way, home to our Solar System, counts numerous planets and stars. Can there be life there? We've gathered a list of possible civilizations that may hide in our galaxy. Let's head on a journey in space to find 36 ...

There are some who believe that people with Rh-negative blood may have evolved from an extraterrestrial species in this clip from Season 11's episode, "The Prototypes". #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: http://histv.co/SubscribeHistoryYT Find ...