Last year’s Super Bowl winners, the Kansas City Chiefs, will be playing against the Philadelphia Eagles. If a Chiefs–Eagles Super Bowl sounds familiar, that’s because it is. Just two years ago, the two teams competed in Super Bowl 57,

The Super Bowl is this Sunday, and even if you're not a football fan, you’re still pretty much required to watch the showdown between the Kansas City Chiefs and the Philadelphia Eagles. Super Bowl Sunday has become as much of a U.S. tradition as the Fourth of July.

No one knows exactly how much money is bet on the Super Bowl, but it’s a lot — more than $10 billion, according to estimates, much of it illegally. The most common way to bet is through the point spread (Kansas City is a 1 1/2-point favorite, meaning they must win by at least 2 points for bettors backing them to cash in).