When you have to go, where does it go? That\u2019s 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\u2019s \u201cThe Great Stink?\u201d We\u2019ll be plunging into the past, present, and future of flushing to discover how toilets don\u2019t just save us from stinky smells - they save lives.\xa0 \n\nThanks 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.