Archaeologists have uncovered further evidence of a pre-colonial “garden city” in Bolivia where ancient Amazon people lived largely reliant on maize agriculture and raising muscovy ducks.

The pyramid was built over 5,000 years ago, even before the pyramids of Egypt and Mesopotamia, a time when archeologists had believed the Amazon was populated only by hunter-gatherers.

Ancient Amazonians ... complex societies in the Amazon,” Lombardo said. “When you start looking at the maps, you actually realize that it is like a huge city of tens of square kilometers ...