Scott Kelly — NASA Astronaut — A year in orbit doesn’t just change your body—it rewires how you see Earth, risk, politics, and what actually matters.
In this uncut conversation we discuss:
• Why the “hardest part of Mars” isn’t rocket science—it’s political science
• The real odds of dying on launch (and why astronauts still get on the rocket)
• What daily life on the ISS actually feels like: schedules, sleep, food, and isolation
• The weirdest realities of microgravity (yes…including the toilet)
• 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 “big fan of Earth”)
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 - “How likely are you to die?” 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 “easiest” to fly today?
30:19 - SpaceX landings, Starship scale & why Kelly changed his mind about what’s possible
33:24 - Living with 3–13 people in orbit: toilets, claustrophobia & the gorilla suit story
39:01 - A real day on the ISS: GMT, ground conferences, work weeks & “mental health days”
52:09 - Re-entry: fireball windows, parachutes, “the best ride ever” & 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 “8 milliseconds younger”
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 don’t quit
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