UFO
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Is it a cloud? Britons think it's UFO over Portsmouth
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Alien thigh bone on Mars? Odd object on NASA Curiosity rover photo
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Houston, we have a problem: UFO sighting stirs frenzy of tweets
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UFO over Houston visible in photos and video
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Houston residents spot UFO, flying saucer giving a light show?
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Two more holes found at 'The end of the world' in Siberia
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Neil DeGrasse Tyson thinks aliens found humans, creatures on Earth uninteresting
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NASA launching Mars parachute test off Kauai
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Deer have close encounter with UFO: Take us to your Lea-deer?
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Scientists link flying snakes to UFOs
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