When you have to go, where does it go? That’s what our listener Ellie wants to know. Prepare for potty humor and science as we hear from civil engineer and toilet expert Francis de los Reyes! Who invented the toilet? And what’s “The Great Stink?” We’ll be plunging into the past, present, and future of flushing to discover how toilets don’t just save us from ... Show More
Sep 4
Mailbag: Why Does the Left Brain Control the Right Side of Your Body? Are Dinosaurs Reptiles or Birds?
In this final mailbag episode of Summer 2026, Marshall and Lindsay address two listener questions, and learn about a surprising twist of evolution. Plus, listener reviews and comments! To get an invite to the next Tumble meetup, as well as receive birthday shout outs and ad free ... Show More
18m 12s
Nov 2022
Flush! Where does our poo and pee go?
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'll hear from a "PooTube" star about her experience with "the flush." We'll also hear about ... Show More
33m 59s
Oct 2023
The Crappy, Commodious History of Toilets
Since the dawn of civilization, humanity has been trying to figure out where to put all its poop. While it's easy to take your average flushing commode for granted, it turns out thousands of years of research went into creating the toilets we use today. Tune in as Ben, Noel, and ... Show More
47m 49s
Jul 2020
Toilet
You may call it the toilet, the loo, the privy, the potty, the can or even the bathroom, but whatever you call it, this everyday object has its roots in Bronze Age Pakistan. It even had a seat!But how did the toilet come to be? Given one third of the world’s population still live ... Show More
27m 43s