Every time you flush, your poo and pee start an epic journey. From the toilet, to the sewers, to a treatment plant, our waste travels quite a distance only to end up cleaner by the end. We&#39;ll hear from a &quot;PooTube&quot; star about her experience with &quot;the flush.&quot; We&#39;ll also hear about ancient sewers, a &quot;fatberg&quot; under London and a toilet that cleans waste on site. Plus, our Moment of Um answers why you can feel your heart beating in your neck of all places.
Sponsors for this episode include: 
<ul>
<li>The new Kevin Henkes book, &quot;Sweeping Up The Heart” </li>
<li>Panama City Beach (visitpanamacitybeach.com)</li>
<li>Calm (Calm.com/brainson) for 25% off premium subscription</li>
<li>Quip (getquip.com/brainson) to get your first refill pack free.</li>

</ul>

And you can support the show at brainson.org/donate !

Space: The ultimate intergalactic game show

Brains On!® is a science podcast for curious kids and adults from American Public Media. Each week, a different kid co-host joins Molly Bloom to find answers to fascinating questions about the world sent in by listeners. Like, do dogs know they’re dogs? Or, why do feet stink? Plus, we have mystery sounds for you to guess, songs for you to dance to, and lots of facts -- all checked by experts.