MEDIA COVERAGE

"In 2007, while searching for signs of ancient human inhabitants of the Andes mountain range, more than 4,300 meters above sea level, Kurt Rademaker came across a field littered with chunks of obsidian—some of them fashioned into tools. “There were hundreds and hundreds of them,” recalls Rademaker, then a graduate student at the University of Maine. “Adjacent to this open-air workshop, just up above it on the hillside, was a beautiful rock shelter. . . . I just had a gut feeling that it was the kind [of site] I had been looking for.”