The longest night of his life, photographer Murray Fredericks says, was spent on an ice cap in Greenland in March 2010. He had been dropped off by helicopter about ten days earlier to begin work on his Greenland Ice Project. After braving the minus 50 degree windchill alone, he got a call on his satellite phone. An expedition team passing within a couple of miles were being followed by two polar bears, who had since changed direction and were heading his way. “I got a call saying, ‘Get your gun ready, and don’t fall asleep,’” he remembers. And then a blizzard blew up, threatening to collapse his tent and clogging his gun with snow.

You might draw the conclusion that the