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.
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.
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