Science Magazine – June 3, 2022: A 10th-century Maya structure at Chichen Itza, Mexico, is often called the Observatory for its expansive view of the sky and a design seemingly guided by key positions of the Sun, Moon, and planets. The historic Maya anchored their calendars and rituals to celestial events, and their astronomical knowledge is now coming into sharper focus thanks to new analyses of archaeological relics and insights from today’s Maya.