Meet the last members of Bolivia's disappearing indigenous tribe
Two hundred years ago, the Pacahuara tribe was one of the main indigenous groups in Bolivia.
But in a few years their language and culture could vanish forever as the last members of the tribe die out without having passed their knowledge on to a new generation.
When the Terraba tribe in Costa Rica rallied to oppose a hydroelectric dam they feared would destroy their land and their centuries-old culture, the indigenous community took a modern approach.
They linked up with journalism students at Elon University in North Carolina, who built a website describing the tribe's way of life, including how it makes use of medicinal plants.
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