6 Isolated Groups Who Had No Idea That Civilization Existed (Cracked)

[Dowly]

http://www.cracked.com/article_19976...n-existed.html

Maybe you're proud of the fact that you still haven't updated to Facebook
Timeline or started a Twitter account, or that you still read all of your books
on paper. But no matter how hard you swim against the mainstream, there are
some groups out there who will always top your anachronistic stubbornness --
groups that have managed to avoid pretty much all of civilization right up
until, oh, about nowish.

Ok, not exactly a scientific source, but still, interesting.