Can Tree Rings Explain the Demise of a Lost Civilization?

Name: Can Tree Rings Explain the Demise of a Lost Civilization?
Uploaded: 2018-09-13
Duration: 139042
Description: Archaeologists believe the sudden destruction of a pre-Columbian civilization found in southern Illinois occurred around 1150 AD. But to find the cause of such upheaval, they look to the surrounding trees.

Archaeologists believe the sudden destruction of a pre-Columbian civilization found in southern Illinois occurred around 1150 AD. But to find the cause of such upheaval, they look to the surrounding trees. (02:19)