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The Maya lived in Mexico and Central America. They built pyramids, used writing and an accurate calendar.
The Maya used the number zero too, discovered on their own!
The Aztecs built Tenochtitlan on a lake, with floating gardens called chinampas. Mexico City stands there today.
The Inca ruled the Andes from Cusco. They built Machu Picchu and 40,000 km of mountain roads.
The Inca kept records with knotted strings called quipu.
