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 on Thursday.

Let's analyze the complex history of the poinsettia and how it went from an Aztec symbol to a Holiday icon. Shirley Gomez . Senior Writer. DECEMBER 20, 2024 3:20 PM EST DEC 20, 2024, 3:20 PM EST.