[nico]

> Twenty years ago, brazilian researchers who would mention this theory were considered a bit lunatic

You are right. However, not only Brazilian researchers, an not just 20 years ago

Check out the movie "The Lost City of Z" or the story of Percy Fawcett

[physicles]

Also, the amazing story of Helena Valero, kidnapped by an Amazon tribe, survived just on her wits, and escaped years later: https://news.ycombinator.com/item?id=41758857