Podcasts History HistoryPod 29th June 1971: Soviet spacecraft Soyuz 11 disaster, resulting in its cosmonauts becoming the only humans to ever die in space

29th June 1971: Soviet spacecraft Soyuz 11 disaster, resulting in its cosmonauts becoming the only humans to ever die in space

Published: June 29, 2024, 2:05 a.m.

Subsequent investigations revealed that a cabin vent valve had accidentally opened and depressurised the capsule when the service module was jettisoned at an altitude of 168 km, causing the crew to fall unconscious and suffer cardiac arrest in less than a ...