Valley of lost cities that flourished 2,000 years ago found in Amazon

Laser-sensor technology reveals network of earthen mounds and buried roads in rainforest area of Ecuador

Archaeologists have uncovered a cluster of lost cities in the Amazon rainforest that was home to at least 10,000 farmers about 2,000 years ago.

A series of earthen mounds and buried roads in Ecuador was first noticed more than two decades ago by archaeologist Stéphen Rostain. But at the time, “I wasn’t sure how it all fit together,” said Rostain, one of the researchers who reported on the finding in the journal Science on Thursday.