Satellite photographs taken at night show much of the populated world as a thick network of lights. Cities and highways stand out clearly. The same view of Alaska, however, reveals just a couple of bright spots; the rest of the land appears as a vast, velvety blackness. It’s as though this great subcontinent were an undiscovered country that extends beyond the web of civilization. Indeed, although Alaska has been completely mapped, immense areas are still unexplored. Not only do thousands of mountains remain unclimbed, but most have never even been named. Just to give you an idea of the scope, Alaska has 100,000 glaciers and 10 million lakes.