Medieval Drought In The Southwest

Between roughly 900 and 1260 AD there was a massive drought that severely impacted the plants, animals and people of the Southwest. David Yetman observes how scientists use tree rings to gather evidence from thousands of years ago. Examine the ruins of some of the people most affected by the drought, the Anasazi Indians. Trek through a “ghost forest” for a first-hand look at “yoda” trees.