In a new study, several researchers at CU Boulder reenacted a small part of a trek that people in what is today the Southwest United States may have made more than 1,000 years ago. Rodger Kram, associate professor emeritus of integrative physiology, and James Wilson, then an undergraduate studying biochemistry, spent the summer of 2020 training for an impressive test of endurance: Together, they carried a ponderosa pine log weighing more than 130 pounds for 15 miles up and down a forest road in Boulder County, Colorado—and they did it using only their heads in a technique inspired, in part,...