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 ...

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 ...