Vice
Exequiel Ezcurra is no archaeologist. He’s an ecologist and conservationist, currently investigating the origin and evolution of corn agriculture in Mexico. But while exploring past farming techniques, he discovered something else: early inhabitants of the Basin of Mexico utilized ruins on a nearby mountain to keep an accurate agricultural calendar. Ezcurra published these findings with two other collaborators—his daughter and a friend who took drone footage—on Monday in Proceedings of the National Academies of Sciences (PNAS).