The Maya, to calibrate their calendar, which is justly famous to this day, had to determine the days of the year when the sun shone exactly overhead, not one fraction of a degree lower or higher.

Despite the mysticism that often clouds the Mayan calendar in popular culture, fact remains that the calendar system in use by the Mayans was based on a system used throughout the pre-Columbian ...

The Mayan Calendar is one of these calendars that has ... Two of the most popular ways to determine the length of a year were using the sun and the moon. These are called solar and lunar years ...

Despite the mysticism that often clouds the Mayan calendar in popular culture, fact remains that the calendar system in use by the Mayans was based on a system used throughout the pre-Columbian ...

It could be used alongside the Tzolkin calendar to form a calendar wheel. The Maya followed the movements of the sun, moon, stars and planets to create their calendars. Calendars could include ...

How he found the solution of the mystery of the ancient Mayan calendar, the oldest time-counting system in the world, was explained yesterday by Dr. H. J. Spinden of the Peabody Museum in an ...

Video: Spring Break Yucatan — Students from Northwestern's Department of Earth and Planetary Sciences enjoyed eight days in the Yucatan. Check out their adventures. See more videos from Northwestern ...