Neither those of Egypt nor Mexico: this is the world’s oldest pyramid
Buried until the end of the 19th century, this pyramid, originally believed to be a mountain, is older than those at Giza, ...
More than 90,000 Neolithic stone artifacts unearthed in northeast China
More than 90000 stone artifacts dating back to the Neolithic period more than 5000 years ago have been unearthed in northeast China Heilongjiang P ...