Uncontacted" Amazon Tribe Actually Known for DecadesKelly Hearn for National Geographic NewsJune 19, 2008 Recent photos of an uncontacted tribe firing arrows at a plane briefly made these Amazon Indians the world's least understood media darlings. Contrary to many news stories, the isolated group has actually been monitored from a distance for decades, past and current Brazilian government officials say. No one, however, is known to have had a face-to-face meeting with the nomadic tribe, which lives along the Peru-Brazil border. And no one knows how much, if anything, these rain forest people know about the outside world. The tribe—whose...