Why They Left

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It’s one of the great mysteries. What happened to the Ancient Puebloans - sometimes called "Anasazi" - who lived in southwest Colorado centuries ago? They lived in places like Mesa Verde, then left in the late 1200's. There are different theories why they moved, and researchers are now using computer simulation to figure out if any are right. Archaeologist Tim Kohler is leading the effort for the Crow Canyon Archaeological Center in Cortez. Ryan Warner talks with Tim Kohler.

[Photo: National Park Service/Kay Barnett]