For many years, indigenous tribes in remote regions of Ecuador struggled to get access to vital medical care. But a single mobile surgical unit is changing all of that.
The Shipibo Indians, of Peru, perform a ritual that connects them more closely to shapes and patterns that later manifest in their work: the consumption of ayahuasca, a powerful plant hallucinogen.
An apparent missionary and other outsiders are shown giving clothes and other gifts to children from an isolated indigenous tribe.
The petite Dorset people went extinct before the Vikings arrived and never mixed with Inuit or Eskimo peoples.
Pushed out of their home territory by violence, a second wave of people who had been living in voluntary isolation in the Amazon rainforest has made contact with villagers in Brazil.
Last month's news of an isolated Amazon rainforest tribe in Brazil making contact with outsiders for the first time in almost two decades prompts the question: Are there many more such tribes left?
The illness is potentially deadly for the individuals, who have never been exposed to it before.