Our Island Universe Groundhog Day WMRA | By Shanil Virani Published January 29, 2016 at 7:19 AM EST Facebook Twitter LinkedIn Email Listen • 1:30 Anthony Quintano, Wikipedia Commons On this episode of Our Island Universe: Why do we use a groundhog to predict the length of winter?Shanil Virani, Director of the John C. Wells Planetarium Harrisonburg, VA.Follow on Twitter as shanilv