“Men wanted for hazardous journey. Low wages, bitter cold, long hours of complete darkness. Safe return doubtful.  Honour and recognition in event of success.”  So read the advertisement that the famed explorer, Sir Earnest Shackleton, was said to have posted when seeking a crew for the ill-fated South Pole bound voyage of his ship, the Endurance.  Historians have argued as to whether or not Shackleton really placed the advertisement but what is sure was that bitter, cold, long hours of complete darkness were indeed, the constant companions of the 27 men who ultimately escaped the shipwreck.  Shackleton became a hero for saving the lives of his men by keeping up their spirits through days made up of 17 hours of utter, frigid darkness.