Five centuries ago, the Incas ruled the western half of South America with the help of a unique form of writing based on coloured and knotted cords. These strings, called khipus, recorded major events ...

The Chankillo Archeoastronomical Complex is an ancient solar observatory in Peru that was built thousands of years before the ...

One of the biggest questions about these mysterious sites is where the raw material was dug out of the earth. Excavations at quarrying sites for the most famous megaliths have led to surprising ...