The Ancient Aliens theory proposes that extraterrestrial beings have visited Earth in ancient times and have had a significant influence on human civilization. Supporters of this theory argue that the evidence for the existence of these extraterrestrial visitors can be found in various ancient texts, artifacts, and structures.

According to this theory, ancient civilizations like the Egyptians, Mayans, and Incas may have received advanced knowledge and technology from these alien visitors. Proponents of the Ancient Aliens theory also suggest that these aliens may have been responsible for building structures like the pyramids and Stonehenge, which they claim could not have been constructed by humans alone.

However, the Ancient Aliens theory has been criticized by mainstream scientists and historians as lacking any real evidence. Skeptics argue that many of the claims made by proponents of the theory are based on misinterpretations of historical texts and artifacts, and that there is no concrete evidence to support the idea that extraterrestrial beings have visited Earth in ancient times.

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