Science explains why the 'Polar Bear Plunge' is a really bad idea

Wading in makes it a little safer Flickr via Dan Mullen A polar bear plunge on January 1st, 2012, in Milwaukee, Wisconsin. It sounds like a dumb idea: In the middle of winter, strip down into your bathing suit and leap into ice-cold ocean water. Yet every year, hundreds of thrill-seekers around the world take part…