Brazilian officials have confirmed the existence of approximately 200 Indians who live in the western Amazon with no contact with the outside world.
This uncontacted tribe is not "lost" or unknown, according to tribal advocacy group Survival International. In fact, about 2,000 uncontacted Indians are suspected to live in the Javari Valley where the tribe's homes were seen from the air. But confirming the tribe's existence enables government authorities to monitor the area and protect the tribe's way of life.
In 2008, Survival International released photos of another uncontacted tribe near the Brazil-Peru border. The striking images revealed men aiming arrows skyward at the plane photographing them. Uncontacted Indian groups are aware of the outside world, a Survival International spokesperson told LiveScience at the time. But they chose to live apart, maintaining a traditional lifestyle deep in the Amazon forest. The latest images reveal that the newly confirmed tribe grows corn, peanuts, bananas and other crops.
Because the tribes are so isolated, contact with the outside world can be deadly. Survival International's website, http://www.uncontactedtribes.org/, tells the story of the uncontacted Zo'e tribe. When missionaries contacted the tribe in 1987, 45 Indians died of common diseases that they had never encountered and thus had no tolerance for, including the flu. In Peru, half of the previously uncontacted Nahua tribe died of disease after oil exploration began on their land in the 1980s.
Nearby oil exploration in Peru also threatens the newly confirmed tribe, Fabricio Amorim of Brazil's Indian Affairs Department said in a statement.
"Among the main threats to the well-being of these groups are illegal fishing, hunting, logging, mining, cattle ranching, missionary actions … and drug trafficking," Amorim said.
You can follow LiveScience senior writer Stephanie Pappas on Twitter @sipappas. Follow LiveScience for the latest in science news and discoveries on Twitter @livescience and on Facebook.
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