Lab rats, start your engines! What in the world happened when scientists created tiny rodent-sized cars and taught rats how to drive? And why in the world are these four-legged creatures using their newfound freedom to pick up Froot Loops? And how in the world can all of this benefit us humans?! The rat race is on, and Mindy and Guy Raz are taking you for a ride! It's the Who, What, When, Where, Why, How, and Wow in the World of rat brains behind the wheel! (originally aired 12/9/19).