The Aztec Empire was a fascinating Mesoamerican civilization, which, at the height of its power, spanned tens of thousands of ...

At the height of their power, the Aztec Empire supported a population of up to 3 million in the Valley of Mexico, and many of their largest cities had populations exceeding 100,000. This was not easy, ...

Emilie Le Beau Lucchesi, Ph.D., is a freelance journalist who regularly contributes to Discover Magazine. She reports on the social sciences, medical history, and new scientific discoveries. View Full ...