bow and arrows are not a new invention....
These tribes migrated into the Amazon several millennia ago, and most likely brought the technology with them. Interestingly, the Incas -- who were the closest neighbors to western Amazonian tribes such as the group captured in those images, did not have bow-and-arrow technology. Their fear of the Amazonian archers of the Antisuyo, or "Eastern Quarter," was one of the reasons they never ventured far from the eastern slopes of the Andes. If you're interested in pursuing this subject, I suggest you read my book, "The Unconquered: In Search of the Amazon's Last Uncontacted Tribes." The paperback is due out July 24, 2012. It's original title, by the way, was "The People of the Arrow."
Just because they haven't be in contact with Europeans doesn't mean they have never had contact with anyone. Even among the primitive tribes in the Amazon there has been some inter-tribal contact over the centuries. Did you think they learned about bow and arrows from Europeans?
Most of these tribes would be from migratory tribes, tens of thousands of years ago. They would have shared their knowledge with other tribes they interacted with.
they migrated down there and then broke off of some other tribe, they haven't been isolated since the beginning of time
God gave it to them
that incident about tribes firing arrows at the bbc helicopter?
