The uncontacted tribes, which are located in the jungles of South America, New Guinea and a remote and the beautiful and remote North Sentinel island in the Indian Ocean all have one thing in common - they want to be left alone.
And for good reason. The history of contact, between indigenous tribes and the outside world, has always been an unhappy one.
Contact is usually a disaster for these remote tribespeople, who live a life probably unchanged for more than 10,000 years. Even if the loggers do not shoot them (which they often do) or force them off their land, diseases against which these isolated humans have no resistance typically wipe out half an uncontacted tribe's numbers in a year or two.
Ms Ross added: 'These pictures are further evidence that uncontacted tribes really do exist. The world needs to wake up to this, and ensure that their territory is protected in accordance with international law. Otherwise, they will soon be made extinct.'