http://www.huliq.com/tags/south-pole-cold The taxonomy view with a depth of 0. en http://www.huliq.com/8874/huddling-allow-penguins-to-survive-the-south-pole-cold http://www.huliq.com/8874/huddling-allow-penguins-to-survive-the-south-pole-cold#comments Science emperor penguins Huddling incubation Metabolism South Pole cold Wed, 31 Jan 2007 11:46:09 -0600 harminka 8874 at http://www.huliq.com