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TIL every crewed spaceflight by the Soviet Union and Russia from the first crewed spaceflight by Yuri Gagarin until 2002 used a mechanical computer as navigation instrument

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jNwwN TIL the flag of Denmark is the oldest flag in the world still in use (since 1219).
e0KVL TIL A man called Miyamoto Musashi is considered the greatest swordsman who ever lived and even defeated legendary swordsman Sasaki Kojiro. He arrived on the Island where they were due to fight, late, and with a wooden sword he'd carved out of an oar of the boat he used to get to the island.
R5KM8 TIL Marcus Licinius Crassus, often called "the richest man in Rome," formed the first fire brigade, saving burning buildings only if owners sold at a low price. Otherwise, he let them burn. The buildings would then be leased back to the former owners.
oRZmE TIL that beavers have iron teeth - literally.
pLaG TIL that when the Titanic was found in 1985, the famous Grand Staircase (appearing in many films of the sinking) was missing. During the filming of the 1997 movie, the replica was torn out by the water when the set was flooded; the real staircase was likely ripped out of the ship in the same way.