I have mixed feelings about "Ancient Aliens". They may be on to something. For example, no SME has been able to explain the Nazca lines better.

Sometime back, I read a debunking of "Chariot of the Gods." That book lacked a clear trail of evidence as well.

For sure, there is somebody making a lot money with Ancient Aliens.

I saw some snippets of an Ancient Alien convention. I could only think that these people should find better things to do with their time and travel money. Waiting around for aliens to return and fix our world does not seem productive to me.