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12,000-year-old unexplained structure.
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Sunita Williams of NASA provides a tour of the ISS orbital laboratory.
Penguin slips on the ice resulting in an adorable sound.
How many of you would do this without hesitation?
Baby elephant rescued.
Race against the tide, risking death under huge blocks of ice.
This is one awesome bear.
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This fascinating episode of The History Channel's show "Ancient Aliens" explains the mystery behind the Turkish ruins known as Gobeklitepe. Archeologists have only begun to uncover this huge underground civilization.