Science How did they move those 100-ton stones? Scientists solve Forbidden City mystery.

Constructed more than half a millennium ago, Beijing's Forbidden City includes massive stones hauled from a quarry about 43 miles away. A team of researchers has determined how the stones got there.

Jiang Li

The Forbidden City, the palace once home to the emperors of China, was built by workers sliding giant stones for miles on slippery paths of wet ice, researchers have found.