Prehistoric "desktops" and "laptops."

The article explores the types of nutting stones used by Native Americans during Archaic times. Among the prehistoric uses for the nutting stone were as nutcrackers, anvils for fire making using a bow drill, and grinding stones to crush minerals and seeds for making paint pigments. It describes a stationary nutting stone discovered in the bedrock/floor of the Refugio de la Roca rock shelter in Union County, Illinois. Such device reportedly allowed the Native Americans to prepare and store foodstuffs.