There are a few dozen tribes of people who have never been contacted by the outside world. They are documented using airplanes, the locations of their villages are mapped and the forests around them are deemed "off limits" to logging and hunting to preserve the people's way of life.
A previously unknown tribe in the rain forests of Western Brazil has been photographed using an airplane for the first time. Logging companies are already too-close for comfort to the tribe's villages.
Should this tribe be contacted or left alone?
Read this article. At the end of each short section of paragraphs, click on the 'next' button to take you through the slide-show of pictures and explaining text. In some of the photos, you can see the villagers pointing at the plane with looks of curiosity on their faces.
http://www.wired.com/wiredscience/2011/02/uncontacted-tribe/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+wiredscience+%28Blog+-+Wired+Science%29%2Ffeed%2F&pid=957&viewall=true