What sort of mathematic scientific or architectural advaces did the Aztecs make?

The Aztecs made significant advancements in mathematics, particularly in their use of a base-20 numeral system and the concept of zero, which facilitated complex calculations. They also demonstrated remarkable architectural skills, evident in the construction of monumental structures like the Templo Mayor and the layout of their capital, Tenochtitlán, which featured sophisticated urban planning, causeways, and aqueducts for water management. Additionally, their understanding of astronomy allowed them to create accurate calendars, which were crucial for agricultural and religious purposes.