U.S.: Chances are you filled out an NCAA basketball bracket this year, hoping that it would remain perfect until the end. But how realistic is the idea that your bracket could be perfect? According to DePaul University math professor Jeffrey Bergen, the odds of choosing every game correctly are a slim 1 in 9.2 quintillion (that’s a “2” followed by 17 zeroes). No perfect bracket has ever been officially recorded.

Jerusalem, Israel: Earlier this year, Beitar, the top soccer club in Jerusalem, hired the first two Muslim players in team history. But now the club has been facing difficult situations with its Israeli fans who oppose the Muslim players, even booing when one of them scored last week.

Bydgoszcz, Poland: Gutsy performances by runners Ben True and Chris Derrick helped spur the U.S. Men’s team to win the silver medal on Sunday, March 24, in the 2013 World Cross Country Championship. Kenya, the team expected to tie with or finish just behind Ethiopia, finished in third place. This is the first time the U.S. has beat Kenya in this event since 1984.

Miami, Fla.: The Miami Heat are red hot right now, winning their last 27 games (as of March 25) and leaving the rest of the Eastern Conference in the dust. But they still have room for improvement. In several of their last games they have been behind by a double-digit deficit, and although they eventually pull ahead, it’s a risky way to play. “We’re winning ball games, but we have a lot of room for improvement,” said Heat forward Shane Battier.