How does your nose work?

What is Smell? Why do you need to smell things? Which animal holds the record for how far away it can detect a smell?  All this and more on today's episode #38 SMELL + free activity guide at www.WhoSmarted.com See omnystudio.com/listener for privacy information. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.