The Joe Rogan ExperienceJoe Rogan Experience #1425 - Garrett Reisman
CHAPTERS
Back from orbit: 95 days in space and the shock of gravity
Joe and Garrett open with his 95-day ISS stay, joking about missing the 100-day patch. Garrett explains what re-entry and readjusting to Earth feels like, from “heavy” objects to balance issues.
Muscle, bone, and balance: how astronauts prevent microgravity damage
Garrett breaks down how microgravity causes bone density and muscle loss and why countermeasures have improved since 2008. The key shift is resistive training with higher load and lower reps, done daily for significant time.
Sweat, taste, and survival cuisine: everyday bodily weirdness in space
The conversation turns to the strange physics of sweat in microgravity and how fluids behave on the body. Garrett also explains how fluid shifts affect smell and taste, why hot sauce is ubiquitous on the ISS, and what space food is actually like.
First look at Earth: managing expectations and the 'overview effect' debate
Joe asks about Garrett’s first view of Earth from space, expecting awe. Garrett humorously admits it initially felt underwhelming (“meh”) compared to modern imagery, then discusses why the overview effect resonates differently for different astronauts.
Best views on the ISS: the Cupola vs the real thing (spacewalk)
They discuss the ISS Cupola module and why it’s a premier viewing spot. Garrett jokes that it’s “as good as a spacewalk” (it isn’t), setting up Joe’s curiosity about EVA.
Becoming an EVA astronaut at 5'4": suit limits, training pool, and proving them wrong
Garrett tells the story of being discouraged from spacewalking due to his height and the suit’s limited sizing. He describes failing early training, then adapting suit fit and procedures to eventually qualify for complex EVAs—and doing three spacewalks.
What a spacewalk is really like: fatigue, diapers, and 'mechanic in armor' work
Garrett explains the physical and operational reality of EVAs: long durations, arm fatigue, limited suit mobility, and the need for careful technique. The talk includes practical realities like bathroom solutions and typical repair/assembly tasks outside the station.
Improvising in space: the connector that didn’t fit and the thermal-expansion save
Even rehearsed spacewalks can go sideways—Garrett recounts a high-stakes antenna connector that wouldn’t mate, risking a costly freeze-out. He improvises a fix using sunlight and shadow to exploit thermal expansion and make the connection work.
Living under the sea: saturation diving as astronaut training (and the ocean’s horrors)
Garrett pivots to a two-week saturation dive habitat at ~60 feet, explaining why you can’t surface quickly and how decompression works. Joe reacts strongly to the psychological intensity, sharks, and the surreal logistics of living in an underwater habitat.
Ocean bathroom stories and big creatures: the ‘gazebo’ and the Goliath grouper
In a vivid (and comedic) segment, Garrett describes nighttime trips to a submerged ‘gazebo’ to use the bathroom—without a tank, in darkness, with fish drawn in. The chapter peaks with his encounter with a massive Goliath grouper’s eye in the black water.
From Shuttle to Soyuz to Dragon: why the U.S. relied on Russia (and the gap ends)
Joe asks why Americans must use Soyuz, prompting Garrett’s explanation of Shuttle retirement, cost, safety, and the planned “gap.” He outlines how 2020 marks the transition to new U.S. crew vehicles from SpaceX and Boeing.
Abort systems and launch safety: how Crew Dragon escapes a ‘bad day’ rocket
They dig into capsule abort concepts, comparing older tower-based systems to integrated escape engines. Garrett walks through SpaceX’s dramatic abort test and why launches happen over the ocean, including autonomous range safety systems.
Next leap: reusability, Starship/Starhopper, and making fuel on Mars
Garrett explains how automation and modern software change spacecraft operations and enable broader access. The focus then shifts to full reusability goals (Starship), the Starhopper test, and why methane/LOX matters for refueling on Mars.
Mars realities: radiation, storm shelters, partial gravity unknowns, and growing food
The conversation explores what really limits Mars missions: radiation exposure and uncertain biology, more than raw engineering. Garrett explains GCR vs solar proton events, mitigation strategies, and what we don’t know about living in partial gravity or feeding long-duration crews.
Elon Musk and SpaceX culture: decision speed, timelines, and the Howard Hughes story
Garrett describes his SpaceX role and why commercial space is accelerating through faster decisions and iterative learning. He shares a personal story about comparing Elon to Howard Hughes and explains what drives Elon: lasting impact and pushing toward a Mars colony.
From astronaut to professor and TV consultant: 'For All Mankind' and the sci-fi/tech feedback loop
Garrett explains how he became a technical consultant on Apple TV’s 'For All Mankind' after connecting with Battlestar Galactica’s creators while in orbit. He details how productions balance accuracy with storytelling and his hands-on role across writing, set work, VFX, and performance realism.
Space junk as a growing threat: impacts, shielding, and why prevention matters most
Joe raises the issue of orbital debris, and Garrett emphasizes it’s already dangerous—objects can strike the station, shuttle, and hardware at extreme velocities. He explains Whipple shielding, why cleanup is hard, and why preventing new debris is the best near-term solution.
