Snow really does provide polar bears some pretty good insulation from the cold icy outside air to let their own internally generated heat keep them warm. It may not be quite like our home’s insulation which measures an R-Value (a measure of thermal resistance) of about 3, but it’s not bad at an R-Value of 1 being that polar bears have several feet of insulation around their den.

Updates

I can still make five this week. Another update later today. :)