An African giant pouched rat sniffs for traces of land mine explosives at a training facility run by APOPO, a nonprofit that trains the rats to detect both tuberculosis and land mines. Not only does it have an excellent nose, but it can jump 5 feet in the air. Carl De Souza/AFP/Getty Images hide caption

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Northwestern head coach Chris Collins, center, and players at an NCAA Division I Men's Basketball Tournament Selection Show watch party on Mar. 12, 2017. Nam Y. Huh/AP hide caption

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Nam Y. Huh/AP

March Gladness: A Northwestern Fan Celebrates The Team's First NCAA Bid

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New Orleans Privateer guard Nate Frye signs autographs after a Monday practice at the University of Dayton Arena. Frye, a senior, joined the team when it was going through a difficult period of deciding whether it had the resources to compete in Division I. Tom Goldman/NPR hide caption

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Tom Goldman/NPR

This image shows the 2017 NCAA Division I men's college basketball tournament bracket. Villanova took the overall top seed on Selection Sunday, with Kansas, North Carolina and Gonzaga joining the defending national champions on the No. 1 line for the NCAA Tournament. AP hide caption

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AP

Selection Sunday: 2017 Men's College Basketball Tournament Bracket Set

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An official and others wait for play to resume between the Butler Bulldogs and the Virginia Cavaliers during a second-round NCAA men's tournament game in March in Raleigh, N.C. This coming spring, the road to the Final Four won't go through North Carolina, as the NCAA has decided to move three games out of Greensboro. Grant Halverson/Getty Images hide caption

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An official and others wait for play to resume during an NCAA Men's Basketball Tournament second-round game between the Butler Bulldogs and the Virginia Cavaliers in March in Raleigh, N.C. This coming spring the Road to the Final Four won't go through North Carolina, as the NCAA has decided to move three games out of Greensboro. Grant Halverson/Getty Images hide caption

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Grant Halverson/Getty Images

One possible result in the Mighty Mini Mammals division of 2015's Mammal March Madness tournament. If the species that's seeded highest always wins its bracket, the fennec fox will beat out the rest of the division and advance to the final four. Adam Cole/NPR hide caption

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Adam Cole/NPR

Could A Quokka Beat A Numbat? Oddsmakers Say Yes

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Michigan's Caris LeVert (left) gets a shot past Tennessee's Jarnell Stokes (No. 5) and Jordan McRae (No. 52) in Friday night's NCAA Midwest Regional semifinal. Michigan advanced despite being outscored in the second half. David J. Phillip/AP hide caption

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Kentucky's Andrew Harrison goes up for a shot during his team's victory Sunday over Wichita State. The Wildcats' win sent the previously undefeated Shockers home. Charlie Riedel/AP hide caption

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Charlie Riedel/AP

On 'Morning Edition': NPR's Tom Goldman on the madness so far

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Syracuse's Trevor Cooney (No. 10) shoots between Dayton's Devon Scott (second from left) and Dyshawn Pierre (right) as Khari Price (left) watches during the first half of a third-round game in the NCAA men's college basketball tournament in Buffalo, N.Y., on Saturday. Bill Wippert/AP hide caption

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George Washington University players were dejected Friday as they went down in defeat to Memphis. The team's loss also wiped out any chance for someone to win $1 billion from Quicken Loans and Warren Buffett. Chuck Liddy /MCT/Landov hide caption

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Florida guard Scottie Wilbekin and his teammates are among the teams thought to have a strong chance of winning this year's NCAA men's basketball tournament. Are the Gators your pick? Curtis Compton /MCT/Landov hide caption

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Curtis Compton /MCT/Landov