“Mayan calendar specialists anticipated solar eclipses by correlating their occurrences with dates in their 260-day ...

More than a thousand years ago, astronomers from the Maya civilization developed one of the most sophisticated time-keeping systems in the ancient world—a system that could predict solar eclipses for ...

We live in a light-polluted world, where streetlamps, electronic ads, and even backyard lighting block out all but the brightest celestial objects in the night sky. But travel to an officially ...

We live in a light-polluted world, where street lamps, electronic ads and even backyard lighting block out all but the brightest celestial objects in the night sky. But travel to an officially ...

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 ...

CC0 Usage Conditions ApplyClick for more information. The collection was given to William H. Crocker by Floyd G. Lounsbury and donated to the National Anthropological Archives by Crocker in 1998. This ...

"Two hundred fifty copies printed for private distribution." "The present reproduction is an absolutely exact photographic facsimile of the original ... The format of the original has been followed ...