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What Happened to America’s First Megacity?

In its prime, Cahokia was a prosperous city with a population similar to London’s. But this sprawling Native American metropolis from the Mississippian culture vanished long before Europeans arrived in North America. What happened? Now, cutting-edge scientific research offers a glimmer of hope in unraveling the mystery of Cahokia's disappearance.
Season 2 Episode 6 Length 12:24 Premiere: 11/22/24

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Season 2 Episodes

Earth's Worst Mass Extinction Is Actually a Warning
S2 E12 Length 08:27 Premiere Date 05/17/25

The Modern City That Was Buried By a Volcano
S2 E11 Length 13:34 Premiere Date 04/26/25

Can We Save Mexico City’s Famous Axolotls?
S2 E10 Length 12:10 Premiere Date 03/29/25

Is This Earth’s Most Treacherous Coastline?
S2 E9 Length 10:48 Premiere Date 02/22/25

Why Crocodiles Are Thriving in the Shadow of A Nuclear Plant
S2 E8 Length 12:13 Premiere Date 01/24/25

Scientists Solve the Mystery of a 300-Year-Old Megaquake
S2 E7 Length 13:32 Premiere Date 12/13/24

What Happened to America’s First Megacity?
S2 E6 Length 12:24 Premiere Date 11/22/24

What happened to the once lush, now desert-like Colorado River Delta?
S2 E5 Length 16:32 Premiere Date 10/18/24

Why This Unusual Pattern May Save the Rainforests
S2 E4 Length 09:34 Premiere Date 09/14/24

How Otters Are Saving Earth’s Underwater Forests
S2 E3 Length 10:06 Premiere Date 08/15/24

Earth’s History Is Hidden in These Strange Maps
S2 E2 Length 10:14 Premiere Date 07/18/24

The Biggest Reason To Feel Hopeful About Climate Change
S2 E1 Length 13:02 Premiere Date 06/20/24

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