astronautix.com

4kAn6 TIL that the N1, the rocket developed for the Soviet moon landing program, had a missile variant designed to deliver 17 multi-megaton nuclear warheads, essentially destroying the entire United States in a single launch
PYyMV TIL that during Vostok 4, Russian cosmonaut Pavel Popovich said that he was able to observe thunderstorms from his spacecraft. However, he forgot that the Russian word for thunderstorms was the agreed upon code word for extreme nausea requiring immediate landing, and his mission was cut short.
6EmRm TIL in 1975 Otrag, a West-German company, developed cheap transport rockets. The USSR became nervous, and American corporations concerned about low-cost competitors. American media came to use crude Soviet propaganda to sabotage them, making Otrag evicted from their Congolese base (more in comments)