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.

'Calendar' rock carvings from Ancestral Pueblo discovered. The carvings were found at a site called Castle Rock Pueblo on the Mesa Verde plateau straddling the Colorado-Utah border. Early Native ...

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 heiau, as it’s known in Hawaiian, was reconstructed in 2007 and dates to the early to mid 15th century, according to a Feb. 24 news release from the University of Hawaiʻi at Mānoa. Researchers ...