Uncover the mind-blowing construction techniques at Ollantaytambo, Peru, that predate the Inca by thousands of ...

As Peruvian biologist Constantino Aucca Chutas sat chewing coca leaves with a local elder high in the Andes, his companion ...

They fought the Egyptians, sacked Babylon, and built elaborate cities. Then the Hittites vanished. Today, new discoveries are ...