Almost everyone talks with their hands, a form of communication whose roots can be found in ancient history -- like way, way, way back. At least that's the theory proposed by Metropolitan State University of Denver archeology professor Rich Sandoval. Sandoval says sign language may go back as far as the late 700s, among the Mayan people. He spoke with Colorado Matters about his "hands-on" experience working with the ancient ruins that led to his discovery.
