Scientists suggest in a new study that ancient Mesoamericans tracked leap years using a sunlit horizon. By Becky Ferreira Long before Europeans colonized North America, the Indigenous peoples in the ...

Without clocks or modern tools, ancient Mexicans watched the sun to maintain a farming calendar that precisely tracked seasons and even adjusted for leap years. Without clocks or modern tools, ancient ...

Learn more about Zelia Nuttall, a self-taught scholar who helped uncover many Mesoamerican artifacts.