If you're a skeptic, these UFO sightings will convince you that the truth is out there—and it may not be from Earth.
A mysterious green fireball was spotted streaking through the night sky.
Daily Mail on MSN
Mysterious circular structure spotted near Area 51 sparks theories of UFO landing site
A strange circular formation just miles from the highly classified Area 51 base has fueled speculations that it could be a secret UFO landing site.
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