I Spent 340 Days in Space: Hereâs What It Did to My Mind & Body | Enrico Mayor Podcast #20
Scott Kelly â NASA Astronaut â A year in orbit doesnât just change your bodyâit rewires how you see Earth, risk, politics, and what actually matters.
In this uncut conversation we discuss:
âą Why the âhardest part of Marsâ isnât rocket scienceâitâs political science
âą The real odds of dying on launch (and why astronauts still get on the rocket)
âą What daily life on the ISS actually feels like: schedules, sleep, food, and isolation
âą The weirdest realities of microgravity (yesâŠincluding the toilet)
âą The twin study surprises: telomeres, time dilation, and what space does to your biology
00:00 - Intro
01:01 - What a year in space teaches you about Earth (and why Scott is a âbig fan of Earthâ)
06:31 - Launch prep: Star City, Baikonur quarantine & Russian vs NASA training mindset
12:41 - Superstitions, ceremonies & the reality of quarantine before liftoff
15:43 - âHow likely are you to die?â Space Shuttle vs Soyuz risk, escapes & hard truths
22:18 - Why the Space Shuttle was so complex (2,000 switches) vs modern spacecraft
27:05 - Dragon vs Soyuz vs Boeing: which vehicle is âeasiestâ to fly today?
30:19 - SpaceX landings, Starship scale & why Kelly changed his mind about whatâs possible
33:24 - Living with 3â13 people in orbit: toilets, claustrophobia & the gorilla suit story
39:01 - A real day on the ISS: GMT, ground conferences, work weeks & âmental health daysâ
52:09 - Re-entry: fireball windows, parachutes, âthe best ride everâ & why landings feel like a car crash
59:06 - Returning to gravity: dizziness, blood volume changes, skin reactions & losing 20% heart mass
1:08:26 - The twin study: telomeres, radiation, time dilation & being â8 milliseconds youngerâ
1:15:54 - Mars: radiation, life support, why one-way missions are a bad idea, and the politics problem
1:25:52 - Borders from space, tribalism on Earth & what astronauts learn about cooperation
1:38:09 - The hardest personal moment in orbit: learning Gabby Giffords was shot from space
1:52:11 - Advice to young people: find your spark, embrace failure, and donât quit
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