Conspiracy theories involving extraterrestrial life and UFO sightings predate the rise of the internet -- but social media has definitely played a role in spreading fodder for such theories. Watch below for some of the most convincing UFO sightings out there and more extraterrestrial curiosities.
As NASA explores Mars through Curiosity rover, believers in extraterrestrial life continue to point out discoveries of their own. The latest involves a monkey sighting.
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