Comedian and podcaster Brandie Posey (@Brandazzle) returns to the show to talk about hosting celebrity karaoke and ending up on TMZ, more details on how wombat poop ends up cubed, a quick refresher on platonic solids, Brexit and bees, Wandavision, the insane amount of power consumed by Bitcoin and quantum encryption in space.

Comedian April Richardson (@apey) of the podcast Why Do I Like This? returns to the show to chat about moving to England, the smallest reptile on Earth, hibernation in early humans, teaching spinach to send emails, Tiny Elvis and the Wilhelm Scream.

This episode is brought to you by The Great Courses Plus, offering Probably Science listeners a free 14-day trial with unlimited access by visiting TheGreatCoursesPlus.com/probably

Comedian/musician Eli Braden (@EliBraden) returns to the show to discuss stonks, the Robinhood fiasco, PredictIt.org, The Hustler, Psycho Goreman, more dinosaur butthole developments, Colgate University, Perseverance's upcoming Mars landing and evidence of multiple Mars ice ages.

Comedian and actor Marcus Brigstocke (@marcusbrig) joins Andy and Matt to discuss blowing things up in school, puckle guns, coordinated electric eel attacks, solving the mystery of butterfly flight, separating dire wolf fact from fiction and giving shrooms to pigs.

Nobel laureate Frank Wilczek (@FrankWilczek), author of the new book Fundamentals: Ten Keys to Reality, joins Matt and Andy to talk about the work that earned him a Nobel Prize, as well as his book, which delves into the essential concepts that form our understanding of how the universe works, digging into fundamental ideas like time, space, matter, energy, complexity and complementarity.

This episode is brought to you by The Great Courses Plus, offering Probably Science listeners a free 14-day trial with unlimited access by visiting TheGreatCoursesPlus.com/probably

Comedian Ed Byrne (@MrEdByrne) joins Matt and Andy to discuss spiteful octopuses punching fish, using AI to solve protein structures, why recycling doesn't happen as much anymore (and Taiwan's amazing waste turnaround), and Europe's plan for a space claw to capture orbiting junk.

This episode is brought to you by The Great Courses Plus, offering Probably Science listeners a free 14-day trial with unlimited access by visiting TheGreatCoursesPlus.com/probably

Author, podcaster and behavioral economist Dr. Peter McGraw (@PeterMcGraw) returns to the show to talk with Matt and Andy about behavioral economics, cognitive biases, hellish comedy gigs, the science of humor, The Philadelphia Incident, Peter's new book Schtick to Business, stigmas surrounding unmarried life, flaws in happiness studies, how to support an aging populace that isn't being replaced, the new social media platform Clubhouse, Andy's recent shingles bout and Peter's latest podcast project Solo: The Single Person's Guide to a Remarkable Life.

Returning guest Alex Schmidt (@AlexSchmidty) of the podcast Secretly Incredibly Fascinating joins Andy and Matt to swap Jeopardy stories and discuss Doug the cat ruining equipment, grapefruit facts, The Ray Cat Solution to use glowing cats to warn future humans about radioactive waste, the monolith in Utah, Europa's mysterious glow and a beetle you can run over with a car.

This episode is brought to you by The Great Courses Plus, offering Probably Science listeners a free 14-day trial with unlimited access by visiting TheGreatCoursesPlus.com/probably

Comedian Megan Gailey (@megangailey) joins Matt and Andy to talk about honeybees flying sideways, acoustic camouflage on earless moths, new moon rocks, meatless diets and brittle bones, the coolest dinosaur skeletons ever, fossil-hunting laws and Megan's podcast The Greatest.

Producer and current Jeopardy champion Charlie Fonville (@charliefonville) joins Matt and Andy, whose four-day Jeopardy streak Charlie put an end to just yesterday, to talk about sharing the stage with the legendary Alex Trebek, the game theory of Jeopardy, including Daily Double and Final Jeopardy betting strategies, the Two-Thirds Rule, and Andy's odd-seeming bet when facing Stratton's Dilemma, then diving into stories about the return of a rocket from 54 years ago, the launch of a doghouse-shaped satellite, mapping bees, more election fraud claims debunked with math, making diamonds at room temperature in minutes and Charlie's podcast Unremembered Hollywood.