[JimRed]

...as well as the wealth of large pyramid structures predating the ones at Giza, one by as much as 20,000 years...

Cue the "I don't want to say it was aliens" guy in 3...2...1...

[Jonah Hex]

Cue the "I don't want to say it was aliens" guy in 3...2...1...

[PIF]

This has absolutely nothing to do with your alien buddies, but legitimate recent discoveries. The ancient world was nothing like portrayed in modern fiction or movies. People did not even think as we do.