You have to watch this TED talk where Lewis Pugh swam in the North Pole. It's fascinating. http://www.ted.com/talks/lewis_pugh_swims_the_north_pole.html http://

You have to watch this TED talk where Lewis Pugh swam in the North Pole. It's fascinating. http://www.ted.com/talks/lewis_pugh_swims_the_north_pole.html http://www.ted.com/talks/lewis_pugh_swims_the_north_pole.htm...