Detail of eye on page 6 of the Grolier Codex (photo by Michael Coe, all courtesy Brown University) In the 1960s, looters searching a cave in Chiapas, Mexico, came across a rare, ancient codex rich ...

A new study shows the ancient Dresden Codex held calculations could forecast eclipses centuries ahead. Maya daykeepers used overlapping 223- or 358-month cycles to maintain precise lunar and solar ...

Preface -- The Maya and their codices -- Astronomical concepts and terminology -- Maya calendrical cycles and their notations -- The correlation of Maya and western calendars -- The structure of Maya ...

Banner image: Detail from a document called the Grolier Codex. (Credit: Gerardo Gutiérrez) Josue Saénz Treviño, a renowned collector of antiquities, probably didn’t know what he was getting himself ...

An ancient Mayan document long thought to be a forgery was recently found to be genuine. The text, known as the Grolier Codex, was analyzed by researchers from Yale, Brown, and the University of ...

Page 9 and Page 8 of Códice Maya de México (c. 1100) (all images courtesy Biblioteca Nacional de Antropología e Historia, Secretaría de Cultura-INAH-México; all ...

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An accidental discovery in Guatemala has revealed ancient Mayan calculations etched onto the walls of a buried room. These ...

To the modern stargazer, the planet Venus is just another point of light in the night sky. But for the ancient Maya, the brilliant light of Venus was an omen of war that guided ritual activity, ...

The Grolier Codex, an ancient document that is among the rarest books in the world, has been regarded with skepticism since it was reportedly unearthed by looters from a cave in Chiapas, Mexico, in ...

An ancient Maya document, long dismissed as a fake, is not only the real thing, but it’s the oldest-known book in the Americas. Researchers believe the Grolier codex dates back to the early 13th ...