Why do we need belly buttons?

We all have a belly button. Right there, in the middle of our belly, there’s a nub. Some go in, some stick out, but what exactly are they for? We asked pediatrician Emma Gerstenzang to help us find the answer.

We all have a belly button. Right there, in the middle of our belly, there’s a nub. Some go in, some stick out, but what exactly are they for? We asked pediatrician Emma Gerstenzang to help us find the answer.
Got a question that’s hard to stomach? Send it to us at BrainsOn.org/contact, and we’ll help digest the answer for you!


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Smash Boom Best is a debate show for kids and families from the makers of the award-winning podcast, Brains On! Every episode takes two cool things, smashes them together and lets you decide which is best.


Smash Boom Best

A history show for the whole family! Every episode explores the origin of just one thing — like sandwiches, video games, clocks and more — while teaching listeners to think critically about history.


Forever Ago

Our mission is to encourage kids’ and curious adults’ natural curiosity and wonder using science and history…but there’s no age limit on curiosity, and episodes of Brains On can be enjoyed by anyone.


Why do we need belly buttons?

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Smash Boom Best

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