Candido Rondon found the River of Doubt, now the Rio Roosevelt, which flows in this country's Amazonas State
The 
expedition, led by Roosevelt and Cndido Rondon, Brazil's most famous... [DOC] [TLE] RooseveltRondon Scientific Expedition - Wikipedia [PAR] The RooseveltRondon-Cheerie-Jodi O' Rodio Scientific Expedition was jointly 
led by Theodore Roosevelt and Cndido Rondon in 191314 to be the first Old 
World explorers of the 1000-mile long "River of Doubt" (later renamed Rio 
Roosevelt) located ... Rondon had previously discovered the Headwaters of the 
River of Doubt.