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Satellites Discover Amazon’s Isolated Tribes

Scientists are using satellite images to get a better view of the location and size of isolated Amazon tribes living in dense forests along the border of Peru and Brazil. The spacecraft are replacing surveys by invasive, low-flying aircraft, that may scare people not accustomed to modern technology. Analyzing images taken over a number of years by satellite cameras with 50-centimeter resolution, authorities in Brazil discovered five previously unknown villages along the Envira...

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