Why are three goals called a hat trick? Why is "Take Me Out to the Ballgame" sung during the seventh-inning stretch? Why dont the Cleveland Browns have a logo on their helmet? Divided into four levels of difficultya professional level, an All-Star level, an MVP level, and a Hall of Fame leveleach answer is provided not only with an in-depth explanation on the science, history, or origin of the particular subject matter, but with photos and illustrations that help make the information easy to digest. A must-have book for any curious young sports fan.