"For one day each year, people across North America count on a network of groggy groundhogs to rise at dawn and issue a six-week weather outlook. It's a popular tradition from Punxsutawney, Pa., to Vancouver, B.C., with crowds often braving bitter cold on Feb. 2 just to see the furry forecasters in action.
But why? How did such a strange ritual ever get started? And is there any truth behind groundhogs' weather-predicting reputation?