More than 100 million people in the United States and around the world are expected to watch the championship game of the U.S. National Football League -- the Super Bowl.
The Baltimore Ravens and San Francisco 49ers are playing Sunday night in Super Bowl 47 at the Superdome in New Orleans, Louisiana.
The contest is a family affair. For the first time in the four major U.S. professional sports leagues -- football, baseball, basketball and hockey -- brothers are opposing each other as head coaches in a championship game.
Baltimore's John Harbaugh and younger brother Jim Harbaugh are two of the best in the business.
Midway through the game, pop superstar Beyonce' will headline the half time entertainment.
Animal Planet, a cable television station, is offering its viewers alternate programming with a different type of sports competition - The Puppy Bowl - for those who would rather watch terrier touchdowns or puppy penalties. The Puppy Bowl returns for its eighth year with hedgehog cheerleaders on the sidelines and kittens headlining its half time show.