
Sego Canyon, Utah, Estimated up to 5000 BC

Kimberley, Australia 5000 BC
The ancient alien theory, sometimes known as the study of ‘ancient astronauts’, has been written on by a variety of fringe thinkers, including David Icke, Zecharia Sitchen, and Erich Von Daniken. They believe extraterrestrials visited the Earth thousands of years ago, sharing their expertise with early civilizations and forever changing the course of human history.
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