Cities of the Sky
Season 1
Episode 3
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About the Episode
Discover the cosmological secrets behind America’s ancient cities. Scientists explore some of the world’s largest pyramids and 3D-scan a lost city of monumental mounds on the Mississippi River; native elders reveal ancient powers of the sky.
Aired:
11/12/18
| Expires: 12/06/25 | Runtime: 53m 30s