PBS Terra is the sister Youtube channel to PBS Eons.  In this episode, they discuss Cahokia, the mysterious city in southern Illinois. It rivaled London in size during its height in 1100 CE.  Monk's Mound is an earthen pyramid that is larger than the Great Pyramid of Cheops.

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?

This Indigenous city’s enigmatic rise and fall has inspired countless theories and has long captivated the imaginations of archaeologists. And now, cutting-edge scientific research offers a glimmer of hope in unraveling the mystery of Cahokia's disappearance.