Petroglyphs of Sego Canyon.The most obvious clues to alien visitation have long been found in the drawings of past cultures. One of the most striking and interesting ancient drawings on the territory of North America. Petroglyphs of Sego Canyon, which are up to 8,000 years old.
On the surface of the stone walls are painted creatures with strange heads and huge eyes. They were painted in a period of 8,000 years ago and bear little resemblance to any known terrestrial creatures. Although the rock art has been studied for about 200 years, it is still a mystery.
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