so please welcome gretel ehrlich and neil conan. [applause] neil: when you first went to greenland in 1993, you brought a couple of books with you. hat were they? gretel: they were two of the 13 volumes of [indiscernible] who had traveled in the 1920's from greenland to of point hope laska. if it wasn't for rasmussen, we would know very little of arctic culture. neil: what did we learn from him? gretel: everything. people originally came across the bering land bridge from northeastern siberia. and they have year-by-year, perhaps 20,000 years ago, first to alaska and then to archipelago, what we call the northwest passage was really the traditional passageway east for them. and they ended up in greenland roughly 5000 years ago. it's one language. there's a lot of dialects. one life way with some variations, according to where they were and what they needed to do to get food. but it's the only single culture that spans 6000 miles just across the top. it wasn't like they said, oh, we are not going to move to santa monica. i don't reall