Four of the world’s seven independent civilization origins sit on a single great circle. The probability: 1 in 2,400. Here’s the map.

I've spent the last month running formal statistical tests on the great circle alignment — the claim that ancient sites from Giza to Nazca to the Indus Valley sit on a single line around the Earth. Eight unique databases, over half a million ancient sites. Every alternative explanation I could think of.

Green dots on the map:

• Egypt (6.3 km from the circle).
• Andes (16.8 km). Indus Valley (26.6 km).
• Mesopotamia (120.2 km).

Red dots:

• China, Mesoamerica, and West Africa miss.

I generated 100,000 random great circles. Only 42 connected four or more of these seven independently originated civilizations. That's p = 0.00042. (1 in 2,400)

The explanation is geological. The circle traces Earth's densest belt of desert-river interfaces – places where rivers cut through deserts, creating the circumscribed environments that force civilizations to emerge. 29 arid-fertile rock transitions along the circle vs. 4.5 for random circles (p < 0.0001). Less than 1 in 10,000.

The three that miss emerged under different conditions.

• China: steppe-bounded.
• Mesoamerica: jungle-bounded.
• West Africa: savanna transition.

The geology predicts the hits and the misses.

One unexpected finding from the same research: while testing navigation routes using the same geodesic mathematics, 10 of 14 pre-industrial long-distance paths – including routes across the Australian desert, Polynesian star paths, and a pre-Columbian trail through North American forest – follow geodesic arcs at precision exceeding 95% of random paths.

Full paper submitted to the Journal of Archaeological Method and Theory.

Preprint: https://doi.org/10.5281/zenodo.19240285
Globe: https://thegreatcircle.earth