Resilience or Why there are so many of us.
He did not fear the cold, he simply slipped outside, pulled down his seal skin trousers and defecated into his hands. As the feces began to freeze he shaped it in the form of a blade, he put a spray of saliva on the edge of the shit knife. When it finally froze solid he butchered a dog and skinned it and improvised a harness, took the ribcage and improvised a sledge with it, harnessed up an adjacent dog and disappeared over the ice flows, shit knife in belt.
From the indispensable TED Talks.
From Wade Davis: Cultures at the far edge of the world
http://www.ted.com/index.php/talks/view/id/69