Over the last few years, huge monoliths have been discovered on celestial bodies inside our solar system, and scientists are unable to interpret their meaning and origins. Could these be surviving artifacts of a long-forgotten martian civilization? Watch...

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Tag(s) : #NASA, #alien, #aliens, #amazing, #ancient, #desert, #discovery, #huge, #leak, #moon, #pyramid, #space, #ufo, #monolith, #mars, #phobos