Microbe Grudge Match!

What the if microbes held a grudge? We're thrilled to welcome Ethan Rappaport, theoretical ecologist at the University of Maryland, to take us inside the tiny turf wars happening in your gut. We imagine bacteria sharing grudges like social media reposts, passing weaponized DNA to their neighbors through tiny genetic pamphlets called plasmids. Before you know it, whole microbial nations could be declaring war on your intestinal lining until you hand over the cotton candy. So maybe skip the diet and keep those gut buddies happy! —— When she's not studying zombie fungus at Harvard or helping us break the universe every week, our very own Gaby Paniccia writes science fiction. Her short story "The Automatic Grocery Store" is now featured on the popular podcast Escape Pod! Listen here: —— Check out our membership rewards! Visit us at Patreon.com/Whattheif —— Got an IF of your own? Want to have us consider your idea for a show topic? Send YOUR IF to us! Visit and let us know what's in your imagination. No idea is too small, or too big! Keep On IFFin', Philip, Matt & Gaby

You can listen to Microbe Grudge Match! online on Radio and Podcast. Open the player on this page to stream the available audio.

Microbe Grudge Match! is an episode from What The If? by What The If?.

This episode is 00:44:16 long.

This episode was published on Apr 3, 2026.

Yes. Use the heart button on the episode page to add it to your favorite episodes list.

Yes. This page shows related episodes from What The If? when more episodes are available from the podcast feed.