Jordan Morris (@Jordan_Morris) and Sarah Morgan (@sarahlmorgan) return to the podcast to celebrate the release of their new graphic novel Bubble and talk about fish brains that grow when they think, bendy ice, Richard Branson kind of going to space and extreme temps in Siberia. This episode is brought to you by Wondrium, offering Probably Science listeners a 14-day free trial with unlimited access by visiting Wondrium.com/probably

Comedian and podcast host Justin Decloux (@DeclouxJ) joins Matt and Andy to discuss how Tasmanian devils get their face cancer, the benefits of mixing vaccines, the dragon man who isn't much of a dragon, figuring out when the first stars shone, and using CRISPR to treat a genetic disease. and Andy's latest writing project, Season 2 of Could You Survive The Movies? This episode is brought to you by Wondrium, offering Probably Science listeners a 14-day free trial with unlimited access by visiting Wondrium.com/probably

Comedian Atsuko Okatsuka (@AtsukoComedy) joins Andy and Matt to discuss Andy's summer of pyromania, a hiccup-curing doohicky, a newly discovered plant organ, that $24 million book on Amazon, Tasmanian devils eating too many penguins, Benedict Cumberbatch's penglings, ineffective spider makeup and Atsuko's latest album But I Control Me. This episode is brought to you by Wondrium, offering Probably Science listeners a 14-day free trial with unlimited access by visiting Wondrium.com/probably

Writer/performer J. Elvis Weinstein (@JElvisWeinstein) joins Matt and Andy to talk about being in the original cast of Mystery Science Theater 3000, figuring out which of the echidna's numerous penises get erect, invasive species hitching rides on ocean litter, Australia's largest dinosaur, pupil size as an intelligence marker, first views of a giant moon rocket, the anonymous rich person hitching a brief ride into kind-of space with Bezos and Matt's upcoming live shows in Fort Collins and Boulder, Colorado.

Comedian and novelist Caimh McDonnell (@Caimh) joins Matt and Andy to talk about his new book The Stranger Times, a Trojan Horse method to fight cancer, the cast of Friends doing a Windows 95 promo, laser-based communication for the next lunar mission and tossing a frisbee to a dog on the moon.

Professional wrestler Colt Cabana (@ColtCabana), host of The Art of Wrestling and Wrestling Anonymous, joins Matt and Andy to discuss Andy's recent Jeopardy Tournament of Champions appearance, pigs breathing through their butts, robotic third thumbs, Colt's merchandise, turtles also joining in on the butt-breathing, tardigrades surviving being shot and psychedelic fungi making Brood X cicada's butts fall off. This episode is brought to you by The Great Courses Plus, offering Probably Science listeners a free trial with unlimited access PLUS 20% off when you sign up for an annual plan by visiting TheGreatCoursesPlus.com/probably

Comedian, theoretical physics grad and mathematics enthusiast Dara Ó Briain (@daraobriain) joins Matt and Andy to discuss stages of mathematical rigor, Évariste Galois, Catalina bison, Dara's new obsession with astrophotography from his London garden (examples of which are here and here), Andy's crappy cell phone moon pic and this podcast's new mission to help Dara get to Bortle 1. This episode is brought to you by The Great Courses Plus, offering Probably Science listeners a 14-day free trial with unlimited access PLUS 20% off when you sign up for an annual plan by visiting TheGreatCoursesPlus.com/probably

Science comedian Brian Malow (@sciencecomedian) joins Matt and Andy to discuss dressing up with Mitch Hedberg, stoned cavemen creating high art, Fast, Cheap & Out of Control, the world's first wooden satellite and a promising malaria vaccine. This episode is brought to you by The Great Courses Plus, offering Probably Science listeners a 14-day free trial with unlimited access PLUS 20% off when you sign up for an annual plan by visiting TheGreatCoursesPlus.com/probably

Bethany Black (@beffernieblack) joins Matt and guest host Nick Doody (@nickdoody) to talk about buying fireworks in France, being banned from all school trips, growing teeth everywhere, surprisingly useful destructive asteroids, the Chicxulub crater, a possible new force of nature and Stephen King books set near us.

Theoretical physicist, futurist and author Michio Kaku (@michiokaku) joins Andy and Matt to talk about his new book The God Equation: The Quest for a Theory of Everything and its look at the fascinating history of humanity's attempts to merge the realms of the very big and the very small into one theory explaining all of existence. This episode is brought to you by The Great Courses Plus, offering Probably Science listeners a 14-day free trial with unlimited access PLUS 20% off when you sign up for an annual plan by visiting TheGreatCoursesPlus.com/probably