Two facts about mynas is that they made murals and they invented mathematics system in astronomic. Two facts about the Incas is they were the first to do brain surgery and they used quipu as their way of writing. Two facts about the Aztecs is they made books and were from the valley of mexico.
The way the Mayans farmed was a way called slash and burn. The way the Incas farmed was by cutting flat terases into sides of mountain and last The Aztecs farmed by basing farming.
the Mayans invented a mathematical system in astronomy. The Incas did the first brain surgery and the Aztecs made books.