Last spring, archaeologists were digging in Mexico. They were in an ancient city called Chichén Itzá (chee-CHEN eet-SAH) when they spotted an unusual object. Researchers brushed off the dirt covering the disc. They discovered writings and drawings etched into the circular stone.
Experts think the heavy disc was used about 1,200 years ago in one of the oldest sports in the world. The stone is also the latest look at the lives of a powerful ancient