@amazeifystore: One valve. Seconds to react. No pressure suits. After Soyuz 11’s service module separated, a pressure-equalization valve opened and the capsule rapidly lost cabin pressure. The crew tried to stop it, but couldn’t. What detail of this spaceflight tragedy surprised you most? #Soyuz11 #SpaceHistory #SpaceExploration #Aerospace #Spaceflight #HistoryTok #Science