Chad Orzel, associate professor of physics and astronomy, used the laws of physics to explain to ESPN why it is so difficult to tackle Denver Broncos running back Javonte Williams.

"It's a really rich subject because there is a lot going on, even in the things that are fairly simple in football," said Orzel. "There's a lot of physics going on, you've got so many moving parts. In physics we're famous for approximating everything as a sphere, football players are very not spherical and the ball isn't even spherical. But you look at the spin around the long axis, you look at the random bounce, things like that, it's a really rich subject physics-wise."

Orzel joined Union in 2001