With everyone quarantining, it’s like spring cleaning never ended this year—and as important as cleanliness is here on Earth, it’s really, really important when you’re headed for outer space.  We’ve talked about planetary protection on the pod before, but it’s never felt closer to home than now, so we’re digging a little deeper into what it takes to keep our planet safe from space germs and keep space safe from Earth germs. On today’s show Emily, Matt, and Nick get into the (dirty) details of how we ensured that our astronauts didn’t bring home bugs from the Moon with our Apollo curator Teasel Muir-Harmony, and look at the (squeaky clean) ways we make sure terrestrial microbes aren’t hitchhiking their way to Mars with NASA Planetary Protection Officer Lisa Pratt. Wash your hands and enjoy!