On a sandstone cliff at a remote Pueblo site in the Southwest, a cluster of spirals and animal figures is forcing ...

Carvings on a 12,000-year-old monument in Turkey appear to mark solar days and years, making it possibly the oldest solar calendar in ancient civilization. Marking a massive comet strike as the start, ...

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.

Stonehenge is an astonishingly complex monument, which attracts attention mostly for its spectacular megalithic circle and "horseshoe," built around 2600 BC. It had long been thought that the famous ...

Our civilization relies on calendars to organize and measure time. Culture, religion, and astronomy have all influenced calendars throughout history. Calendars have a fascinating history, dating back ...

This article is part of a special report on the total solar eclipse that will be visible from parts of the U.S., Mexico and Canada on April 8, 2024. The following essay is reprinted with permission ...