Astronomical Alignments: Stonehenge to Chaco Canyon

He walks through the evidence methodically, starting with what we know about Stonehenge, then crossing an ocean to North America. The same astronomical alignments that define the British monument show up in the earthworks built here before European contact. At Chaco Canyon in New Mexico, Casa Rinconada demonstrates this with precision. It's a ringed structure with a deliberate aperture, positioned so that at summer solstice sunrise, when the sun reaches its northernmost point in the yearly cycle, a single ray of light passes through that opening. That beam travels across the interior and illuminates a niche in the opposite wall, a niche that clearly once held an effigy or sacred object. The alignment is intentional, the geometry is exact, and the knowledge required to achieve it is sophisticated.