Upside DownIn the roadless Brooks Range Mountains of northern Alaska sits Anaktuvuk Pass, a small, tightly knit Nunamiut Eskimo village. Formerly nomadic hunters of caribou, the Nunamiut of Anaktuvuk now find their destiny tied to that of Alaskas oil rich North Slope, their lives suddenly subject to a centurys worth of innovations, from electricity and bush planes to snow machines and the Internet. Anthropologist Margaret B. Blackman has been doing summer