The death of the universe -- and what it mean...

What do radio personality Ira Glass, New York City mayor Zohran Mamdani, and your host Chris Duffy have in common? They all have practiced an unexpected skill that makes them more human—improv comedy. And they learned it from master improv teacher Rick Andrews. Rick joins Chris t ...  Show more

Over the course of hundreds of scuba dives, marine biologist Ayana Elizabeth Johnson fell in love -- with a fish. In this ode to parrotfish, she shares five reasons why these creatures are simply amazing (from their ability to poop white sand to make colorful "wardrobe changes") ...  Show more

Special guest Katie Mack talks to us about how the universe might end.

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Stars. Black holes. THE GAWDANG UNIVERSE. Astrophysicist and cosmologist Katie Mack (@astrokatie) joins to tell us her most embarrassing moments as a cosmologist, to debunk some physicist myths and give the nuts + bolts of everything form particle physics to gravitational wave ...

John has launched a new podcast project with Katie Mack! Crash Course Pods: The Universe is a new limited series podcast where Dr. Katie Mack, a theoretical astrophysicist, walks John Green through the history of the entire universe - including the parts that haven’t been written ...  Show more

Stars. Black holes. THE GAWDANG UNIVERSE. Astrophysicist and cosmologist Dr. Katie Mack (@astrokatie) re-introduces us to this 2017 episode along with some bonus updates on astrophysics, her career, and the book she’s published since we last heard from her. Katie also tells us ...