Topic: Henge

Mound building in North America began around 4500 BC with midden mounds and evolved into complex geometric earthworks. The Adena culture specialized in large conical burial mounds often surrounded by moats and earthen walls, similar to European barrows or henges. These structures served as the foundation for the more advanced geometric designs of the later Hopewell culture.

The Thornborough Henges in Yorkshire, England, are circular earthworks that predate the Giza Pyramids and share an identical layout. Knight suggests that the calculations for the pyramids may have been performed in England, as the sites are located at astronomically significant points. While he acknowledges Robert Bauval's theory regarding Orion's Belt, Knight argues that the alignment is actually a perfect mirror image when viewed from above.