Markings on a stone pillar at a 12,000 year-old archaeological site in Turkey likely represent the world's oldest solar calendar, created as a memorial to a devastating comet strike, experts suggest.

Add Yahoo as a preferred source to see more of our stories on Google. dulancristian/GettyImages Every time you glance at a calendar, you're examining the minds of ...

Event Abstract: Ancient Maya cosmology and sociocultural conduct was entwined with a complex calendar system. This is evident from thousands of stone inscriptions and other extant texts, especially ...

The Aztecs, just like the Mayans, used three distinct calendars, which led to a very complex form of astrology being formed. This art associates a sign of the day, a sign of the month and a sign of ...