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.
An object spotted by NASA’s Opportunity rover has everyone asking, is it a UFO or something else? Josh King has the story (@abridgetoland).
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