Timothy Kohler

The greatest vanishing act in prehistoric America

Vultures carve lazy circles in the sky as a stream of tourists marches down a walkway into Colorado’s Spruce Canyon. Watching their steps, the visitors file along a series of switchbacks leading to one of the more improbable villages in North America — a warren of living quarters, storage rooms, defensive towers and ceremonial spaces […]

Study of ancient dogs in the Americas yields insights into human, dog migration

A new study conducted in part by Washington State University researchers Brian Kemp and Timothy Kohler suggests that dogs may have first successfully migrated to the Americas only about 10,000 years ago, thousands of years after the first human migrants crossed a land bridge from Siberia to North America. The study looked at the genetic […]

Localized climate change contributed to ancient depopulation

Washington State University researchers have detailed the role of localized climate change in one of the great mysteries of North American archaeology: the depopulation of southwest Colorado by ancestral Pueblo people in the late 1200s. In the process, they address one of the mysteries of modern-day climate change: How will humans react? Writing in Nature […]