2,000-year-old 'celestial calendar' discovered in ancient Ch

Archaeologists in China have unearthed a mysterious set of rectangular wooden pieces linked to an ancient astronomical calendar.

Related Keywords

China , Beijing , Huang Wei , Guangdong , Wulong , Sichuan , Chongqing , Wang Meng , Henan , South Korea , Suzhou , Jiangsu , Han , Chinese , Ted Krupp , Tiangan Dizhi , Los Angeles , , Heavenly Stems , China News , Global Times , Western Han , Eastern Han , Griffith Observatory , Ancient Skies , Live Science ,