Yeah, this is true. I read about this on both Yahoo and on CNN. For the guy who said something about the architecture being "too nice" for a tribe....the truth is some of these tribal people are smarter than we are. Case in point...the tribal or village people in Indonesia when the tsunami of 2004 hit. Many, many of those tribal/village people survived the tsunami because they knew how to read the "signs"....all they did was look around....at the animals....and the animals' behavior is what told them to get to high ground. Unlike the rest of us who rely on computers and internet to tell us what's going on. And I'm definitely not hating on anybody....I'm one of those people who is wayyyyyyyyyy too dependent on the internet and on computers. But the facts are there. Those tribal peoples might be some of the most intelligent people in the world. ??