The document discusses several technological innovations of the Aztec and Mayan civilizations. It describes how the Aztecs built chinampas, or floating gardens, out of reeds and mud to grow crops in the lakes around Tenochtitlan. It also details the complex Mayan calendar system of 260-day and 365-day cycles used to track time. The Aztecs constructed large dikes up to 27 feet high out of wood and stone to prevent freshwater mixing with saltwater. Finally, it mentions the causeways built by the Mayans and Aztecs, which were raised roadways through jungles or water that facilitated transportation.

1. Aztec and Mayan Technological Innovations Megan Beaver History 27