National Geographic : 1941 Sep
Treasure-trove of Old Mexican Jade Q National Geographic Society Kodachrome by Richard IH. Stewart Varnishing Skulls to Keep Them from Crumbling in the Air They are part of a collection of 52, found when the explorers removed a cement covering. Beneath were two layers of burial urns, arranged in double rows. Each contained a single skull. Flat foreheads, caused by pressing pads against them in infancy, and filed front teeth reveal ancient Mexican beauty treatments.