fascinating

I found this article on the Piraha tribe's language really fascinating. Here's the metafilter discussion on the article. A researcher is suggesting that the Piraha, a very small tribe in the Amazon, have a very unique language structure - one without recursion. Their language has no subordinate clauses. It also has no words to describe color and no past tense verb conugations. While looking into this a bit, I found that the other oddities of the Piraha language have garnered some attention, too. They have very loose words for numbers, and there's some debate as to whether being unable to articulate specific numbers means that they cannot actually conceive those numbers.
Some articles on this topic:
What Happens When You Can't Count Past Four?
Study of obscure Amazonian tribe sheds new light on how language affects perception
Language Log's link roundup of articles