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 stinky smells - they save lives.  Thanks so much to KiwiCo for sponsoring this episode. If you want to get 50% off your first month of any crate, go to kiwico.com/TUMBLE.