Add Yahoo as a preferred source to see more of our stories on Google. An aerial photo of Stonehenge at sunrise. Stonehenge wasn't a prehistoric solar calendar but served mainly as a memorial to the ...

It had long been thought that the famous site of Stonehenge served as an ancient calendar, given its alignment with the solstices. Now, research has identified how it may have worked. New finds about ...

Stonehenge may have served as a calendar to keep track of the yearly movements of the sun, suggesting a prehistoric link to sun worship in the eastern Mediterranean, according to new research. A study ...

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.

The ancient Mayans are celebrated for their towering pyramids, intricate temples and sophisticated knowledge of astronomy.