I've always been intrigued by the ways ancient societies like the Mayans and Aztecs were able to measure things such as time and astrological movements with the preciseness that they did without modern technology that we utilize today. You wrote in your TCP that "The main way the Aztec calendar differed was in their more primitive number system and less precise way of recording dates." Are there any theories as to why the Mayans were able to be more successful in these aspects, even though the Aztecs should have had Mayan teaching to build upon, giving them somewhat of a head-start?