Carvings on a 12,000-year-old monument in Turkey appear to mark solar days and years, making it possibly the oldest solar ...

Researchers believe an ancient shrine or worship site in Hawaii acted “as a sophisticated seasonal calendar.” The heiau, as ...

Virtually all our cultures use at least one kind of calendar to mark vital annual ... But how do those ancient ideas still shape our lives today? Presented by Howard Timberlake Black holes are ...

The Chinese Agricultural Calendar uses lunar months to determine its dates, but it also has “solar terms” which are based on the solar year. These solar terms helped the ancient Chinese people ...