Groundhogs offer much more than forecasting length of winter

Groundhogs offer much more than forecasting length of winter

Most are familiar with Punxsutawney Phil and his meteorological exploits that occur every Feb. 2. While you may not believe in his ability to predict the true length of winter, Stam Zervanos, professor emeritus at Penn State Berks, is working to unlock the mystery of hibernation among groundhogs. Produced by: C Roy Parker, Public Information