About
Amazon explorer who spent his life protecting the area's indigenous people.
Before Fame
He became an army engineer and worked on infrastructure in the state of Mato Grosso.
Trivia
It was working to extend telegraph lines into the Amazon that encouraged him to explore the wilderness.
Family Life
His father was Portuguese and his mother was native Brazilian.
Associated With
In 1914, he accompanied a young Theodore Roosevelt to explore a river he discovered.
