Math and the Mayans (Eric Vance, National Geographic)
Math and the Mayans: an archaeologist brings his engineering experience to bear in reinterpreting pre-Columbian calendars. From the article: Archaeologists have long looked to Venus to understand Maya calendars and tradition. But now, a fresh look at an ancient text called the Dresden Codex suggests that our understanding of how the Maya tracked Venus for their celestial calendars [...]