antarctica clouds coast day ice icebreaker landscape McMurdo Midnight Sun ocean sea seascape ship sky snow South Pole summer ice transport voyage civilization mount outpost peace polar quiet science scientist solitude summer town walk cold frozen memorial monument mountains plaque Ross Sea sailor statue sun village winter Antactica bird icy lava McMurdo Station Ross Ice Shelf skua SouthPole water building cross garden history hut land Scott structure lanscape mountain volcano cargo convoy night supply coastline person rock seal