Archeologists have uncovered a cluster of lost cities in the Amazon rainforest that were home to at least 10,000 farmers around 2,000 years ago.
A series of earthen mounds and buried roads in Ecuador was first noticed more than two decades ago. At the time, “I wasn’t sure how it all fit together,” said Stéphen Rostain, one of the researchers who reported the finding on Jan. 11 in the journal Science.
