Admiral Byrd, the famous explorer, once found himself about 100 yards away from the safety of his South Pole hut when a sudden blizzard hit. The temperature was several degrees below zero, and the snow was blinding. There were no landmarks in the white expanse of snow and ice-covered sea that would help him get his bearings. Yet, he knew that if he didn’t find the comparative warmth and safety of his hut, he would freeze to death i…