Funny enough, I was just reading about Percy Fawcett’s doomed expedition to find the lost city of Z in the Amazon and turns out he has been fully vindicated. He went against the general scientific consensus of the time that complex civilization was impossible and the area he is thought to have disappeared in the Xingu Park has since been found to hold a civilization of 20+ settlements and a peak populations of up to 50,000 inhabitants.

Wild stuff.