The moraine of glacial till, dirt, and rock pushed down by the Dawes Glacier hundreds -- if not thousands -- of years ago is called “the bar.” We crossed it aboard National Geographic Quest at 5AM during a down torrent of rain.  As the morning wore on, the rain stopped but the tidal flow of ice clogged the channel where our expedition landing craft drivers would take us to the face of the glacier.  We paused and wondered at the many waterfalls that lined Tracy Arm, pondering on what it would take in terms of the physical ability to survive in this raw wilderness, as seals spied on us from the cold water.