This week in science: the tooth, forsooth!

Did you know that the narwhal tusk is actually a modified tooth?

Free image from Wikipedia.  

To tie into my earlier post on traditional knowledge (TK), here is a great instance of scientists working with local TK holders to conduct their study on narwhals in the eastern Arctic.  This article isn't quite from the last week, but "This fortnight in science" just doesn't have the same right to it.

Enjoy the article, including a slideshow of the research team in action!