How can a person wearing only Speedo’s...

[cyril]

On 14 December, Pugh swam a kilometre in the seas off the Antarctic Peninsula at a latitude of 65º South, some of the world's coldest waters, where the sea's saltiness allows temperatures to dip to just below 0 ºC without freezing. The feat, which took 18 minutes and 10 seconds, required him not only to maintain a safe body temperature throughout the ordeal, but also to stave off the crippling effects of the body's natural reaction to icy water.full story;
http://www.nature.com/news/2005/051219/ ... 219-1.html