An earnest defense of America's silliest holiday: Groundhog Day – NPR

An earnest defense of America’s silliest holiday: Groundhog Day  NPRHow accurate is Punxsutawney Phil on Groundhog Day? Here’s how he stacks up to weather-predicting animals.  Yahoo! VoicesScientists cast doubt on reliability of US groundhog’s weather forecasts  The Guardian USGrading the groundhogs  National Oceanic and Atmospheric AdministrationThese are the animals other than Punxsutawney Phil that will predict end of winter on Groundhog Day  Fox Weather