Smallpox was certified eradicated in 1980, but I first learned about the disease's twisty, storied history in 1996 while interning at the World Health Organization. I was a college student fascinated ...

Three codices from the 16th and 17th century describe historical details about the Aztecs and the area that is now Mexico City. When you purchase through links on our site, we may earn an affiliate ...

Cemanahuac : the land surrounded by water -- The world view of balance : the cosmic tree and the four quarters -- Mountains of water : Tenochtitlan and Aztec communities -- Education and the Aztec ...

WASHINGTON (Reuters) - Using written symbols such as hearts, arrows and hands, the ancient Aztecs maintained an arithmetic system that was far more complex than previously understood, scientists said ...