Ancient Apocalypse
Journalist and writer Graham Hancock travels the globe hunting for evidence of mysterious, lost civilizations dating back to the last Ice Age. He attempts to prove that a climatic event 12,000 years ago wiped out an entire civilization far more sophisticated than the simple hunter-gatherers some archaeologists believe lived at that time.

Season 1 · Episode 6 ·
America's Lost Civilization
Graham visits ancient mounds in North America and wonders if they contain astronomical significance — or even warnings of an apocalyptic climate event.
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Episode 6 of season 1 of Ancient Apocalypse: “America's Lost Civilization”. Aired 2022-11-11. Watch it online free on ZapFlix.