Andrew & Polly investigate the science of sneezing, how tissues are made, how the amazing human body protects itself, and how we can all protect each other when we...ah...ah...achoo! Thanks to Wow in the World’s Mindy Thomas for playing “Should I Pick It?” and communicating so much gooey science from her New York Times best-selling book The How and The Wow of the Human Body. And thanks to pediatric surgeon Dr. Willie Moses from UCSF for using his imaginary laparoscope to reveal the secrets of the cellular LEGO kit inside all of us. Thanks to the families who support our work at patreon.com/earsnacks! And thanks to the four fantastic kids -- Emily from Scotland, Mila from Wyoming, Valentino from Italy, and Izzy from California -- who helped us think about tissues inside and outside our bodies!  Thanks to this episode’s sponsors! Thanks to MIT Kids Press. Get Ada and the Galaxies wherever books are sold Thanks iD Tech Pro. To save $150 on weekly, small-group semesters, go to idtech.com/EARSNACKS and use promo code EARSNACKS. You can also get started with a 1-on-1 tutoring lesson for just $49.