From time to time you can hear from researchers about the mysterious reptilian creatures that people periodically see. Whether this is true or a figment of fantasy is an interesting question. But after reading the ancient epics, you can very often find a description of these interesting creatures.
Then, thousands of years ago, they were called Nagas, considering them evil creatures, but they treated them with respect and tried to live with them in peace.
You can also often read that among the people of snakes there were various representatives, including those who were very loyal to people. In most cases, the Nagas tried not to conflict with people, with certain exceptions.
The Mahabharata even describes that the royal family of Kuru had Nagas in their ancestors, that is, part of their blood was reptilian.
Anyway, in the Mahabharata, the description of contacts with the Nagas can be found quite often, then it was a normal phenomenon.
The Aryans described a people of snakes that lived underground. Moreover, judging by the descriptions, there were Nagas of various physical structures. For example, there were ordinary snakes familiar to us, there were human-like reptilians, and, also, there were snakes that had several heads.
For example, in his youth, Vasudeva Krishna overcame a gigantic three-headed serpent living in the river and preventing anyone from crossing it.
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Based on the foregoing, it can be assumed that Nagi are not aliens at all, but another type of intelligent creatures living next to us, on our planet. Perhaps they still exist, they just live somewhere in the bowels of the Earth, periodically coming to the surface on their own business, and frightening bystanders.