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After tracking methane levels on Mars over the past few years, Elizabeth Rampe, NASA Exploration Mission Scientist, breaks the news that there is a cycle in the gas that could be caused by possible life, in this clip from Season 13, "Return to Mars". #AncientAliens
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"Ancient Aliens" explores the controversial theory that extraterrestrials have visited Earth for millions of years.
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13 мар 2020
