Why do dogs wag their tails? There’s more to it than you think, scientists have spotted the oldest known black hole yet, an update on the oldest dog record, and this day in history - we look at the Rock n Roll Hall of Fame.    Black Hole (Smithsonian Magazine) Tail Wagging (Sky News) Oldest Dog Update (Sky News) Rock and Roll Hall of Fame (Smooth Radio) Contact the show - coolstuffcommute@gmail.com Instagram - Facebook