New Tribe Found?

Photos were released of a tribe living in Brazil near the Peruvian border.  The tribe, Brazil and monitors claim, has never been contacted by the "outside" world.

To me, it is fascinating to think that there are places on earth that do not know anything about the rest of the world.  They have their own culture, their own history and their own way of life.

The concern is that deforestation and oil drilling will force this tribe out of its locale, ruining its culture forever. 

I wonder what kind of interaction the tribe has had with other tribes.  And if and how the tribe will be introduced to the rest of the world.