The Uncontacted Tribe of the Brazilian Rainforest
This is the first footage of one of the very few uncontacted tribes left in the world. This footage was taken in order to stop the development of an oil plant(go figure).
Nobody believed that these people even existed until these shots were taken.
In light of this footage, it's nice to know that Conoco-Phillips decided not to drill for oil right where these people live. I guess they decided that killing one of the last uncontacted native tribes of the world isn't good karma.