uncontacted peoples

I was completely amazed to hear the news tidbit about the uncontacted tribe of people in the Amazon. I take for granted that everything in the world has been discovered and there are no more magical uncharted places on Earth. Could i be wrong?

Is it that i've been living in over-developed landfilled cities with man-made coastlines for too long, that i think every human settlement pushes the boundaries of geographical sustainability. My idea of the world has shrunken to match my urban surroundings, in a city where police shoot and kill a cougar who lost its way and a coyote finds refuge in a Loop Subway sandwich shop. Nature has nowhere to go here, the wild butts up against the unwild and is mundanely destroyed by it.

Just knowing about the uncontacted tribes makes "modern" behavior like a trip to Target seem absurd. It's important to remember that our way of life is not natural.