Madness feels a little different this year. This past December, the college basketball and sports media world lost a titan with the passing of Greg Gumbel. Gumbel's iconic voice had been the one to welcome us every year to the greatest tournament in all of sports.

CBS opened up its broadcast of the first day of the NCAA men's tournament with the studio panel paying tribute to the late Greg Gumbel. "A void was left that will never be filled," said host Ernie Johnson of Gumbel's passing.

But if you're a basketball fan, then you probably only care about one thing - March Madness. It's the NCAA Basketball Tournament, and if you can't take to the court, you can play along at home with the CBS Miami Bracket Challenge. So it's time to brush up on your college basketball knowledge.