On the Cover: Gathered from Mesoamerica and South America, the pre-Columbian artifacts displayed on this month’s cover are part of the Paul R. Cheesman Collection now on exhibit at Brigham Young University. The Aztec calendar stone forms a backdrop for whistle pots, drinking vessels, water jugs, a child’s toy, and a primitive metal gear. More about this fascinating period in man’s history may be found in “Pre-Columbian Discoveries Link Old and New Worlds” by Cyrus H. Gordon, on page 56.