Summary
Overview
Hannah Fry and Michael Stevens explore fascinating stories about humans venturing beyond Earth, from the tragic deaths of three Soviet cosmonauts who became the first humans to die in space, to examining whether everyday items like bottled water or our phone numbers are truly 'trapped' forever. The episode weaves together space history, mathematical curiosities about pi, and surprising animal behavior myths.
The Only Three Humans to Die Beyond Earth
The hosts reveal the story of Soyuz 11, the 1971 Soviet space mission where three cosmonauts became the first humans to die in outer space. Georgi Dobrovolsky, Vladislav Volkov, and Viktor Patsaev successfully lived on the Salyut-1 space station for 22 days, but tragically suffocated during their return journey when explosive bolts broke the capsule's seal at 168 kilometers above Earth. The Soviet Union kept the cause of death secret for two years, creating panic among space agencies worldwide about the dangers of extended space travel.
- Three Soviet cosmonauts were the first humans to die in outer space, not on planet Earth
- The crew spent 22 days on Salyut-1, the first space station, launched in 1971
- They encountered smoke when first entering the station and survived an electrical fire on day 11
- All explosive bolts fired simultaneously during undocking, breaking the air seal at 168km altitude
- The cosmonauts died from suffocation within a minute while trying to manually close the ventral valve
- Soviet Union mandated pressure suits for all future missions, reducing crew from three to two
" I want to start today by talking about the only three humans to have not died on planet Earth. "
" The rescue crews open the hatch, and the crew is dead inside. "
" It is the memorial and the site, not of their demise, but of our recognition that for the first time in human history, our species did not end on Earth. "
Modern Space Travel and Risk
Christina Koch, an Artemis astronaut, shares insights about mentally preparing for the possibility of death during her mission. NASA revealed just days before launch that the mission had a 1-in-30 chance of catastrophic failure—higher than the crew expected. The conversation explores how astronauts psychologically prepare for worst-case scenarios and the importance of clear communication during emergencies.
- NASA revealed a 1-in-30 chance of catastrophic failure just days before Artemis launch, roughly 96% success rate
- Christina Koch experienced a terrifying re-entry when faulty audio made her think they were experiencing 7-8 Gs instead of 3-4 Gs
- The crew had agreed to remain stoic if death was imminent, which paradoxically increased Koch's anxiety during the incident
" OK, that's higher than I thought it was going to be. And then I thought we were like 99% sure we were coming home. "
" If we're gonna die, surely he'd be less chill about this than he is. And then she thought, well, no, because we've spoken about this. We've all decided to be stoic. "
📚 5 more sections below
Sign up to unlock the complete summary with all insights, key points, and quotes
Get this summary + all future The Rest Is Science episodes in your inbox
100% Free • Unsubscribe Anytime
Sign up now and we'll send you the complete summary of this episode, plus get notified when new The Rest Is Science episodes are released—delivered straight to your inbox within minutes.