In the fifth episode of What the "WHAT" Taught the World with Dan, we come across a topic that smells funny: the rat. We're talking about how studying rats has helped us to understand the "smellscape", how we smell, and how rats might be able to sniff out if you're sick with a deadly disease. We also have a contest to see who has the best "guilty smell". The winner will win free good-smelling soap from my friend Leah and her company Herd Supply Co. So tune in for this scientific adventure into the world of the rat!