Sort:  

Eerily similar, these cultures only had the night sky in common. Or did they share other knowledge too..?

good information in single pic

Amazing pyramids. It would be very helpful when you will share more information. Thanks for sharing.

Thanks for your information, interesting post.

They are all the same since 35-degree slope (as opposed to 90 degrees) the maximum that you can obtain without "modern" structural support. All houses are also "the same" basic construct. The similarity is a function of the tech and materials.

This is not meant to prove or disprove any other theory of knowledge, but as a brake check as to why they are similar.