Why do you have a Belly Button?

Did your Belly Button once keep you alive? Why do some people's Belly Buttons look so different? What does your Belly Button do now?  Have you started your FREE TRIAL of Who Smarted?+ for AD FREE listening, an EXTRA episode every week & bonus content? Sign up right in the Apple app, or directly at WhoSmarted.com and find out why more than 1,000 families are LOVING their subscription! Get official Who Smarted? Merch: tee-shirts, mugs, hoodies and more, at Who Smarted?