When a groundhog sees his shadow why is there six more weeks of winter?

Did the groundhog see shadow?  Did the groundhog see its shadow?  What if the groundhog sees his shadow?  Whats a groundhog have to do with winter?  Did the groundhog see his shadow in 2007?  What happens if groundhog sees his shadow?  If Groundhog sees shadow what does it mean?  What happens if the Groundhog sees his shadow?  What happens if the groundhog sees its shadow?  Why does the groundhog shadow mean longer winter?  What does it mean if the groundhog sees it shadow?  What does it mean when a groundhog sees its shadow?  What does it mean if the ground hog sees his shadow?  Can a groundhog really predict the length of winter?  How many times has the groundhog seen his shadow and got scared?  Will it be more 6 weeks of Winter on Groundhog Day no matter what?  Why is it that if a groundhog sees it's shadow we have 6 more weeks of winter?  If a groundhog sees its shadow on february 2 will you get 6 more weeks of winter?  Why is there going to be 6 more weeks of winter when a groundhog sees his shadow caused by the sun an indication that it is sunny and warm asopposed to cold and dark?