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 ...

"The Aztec calendar" on p. [1-2] of cover, duplicates p. 35-37 of text. siris_sil_914287 ...

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. Before the Spanish arrival in 1519, 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 ...

From 1000 BCE, most of Central America used similar types of calendars based on material objects and celestial constellations. The two most common calendars were the 260-day festival calendar and the ...

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