The Grapevine
Since there was a Cold War in place when the Space Race occurred, secrecy was rampant. Rumors quickly spread, and some were so persuasive that they’re around now. The primary one is that the Soviets sent people to space to die.
Lost Cosmonauts
People often whispered about the lost Soviet cosmonauts during the beginning of the Space Race. Stories came out about those who had died or had mental breakdowns after the expeditions. Likewise, cosmonauts were reportedly abandoned in space.