There has for a long time been a heated debate about whether or not there is life beyond the realms of what we know, i.e. outside of our planet. While scientists calculate the mathematical probability of some kind of lifeform existing elsewhere in the universe, given its vastness, many others claim to have actually seen UFOs, actual aliens, and even to have been abducted aboard spaceships. Add Roswell, conspiracy theories about whether or not we actually ever made it to the moon, and purported visits by aliens such as Valiant Thor, and there is a lot of material for a lively debate and widely diverging theories on the subject.