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TIL Genghis Khan invented biological warfare and flung plague-infested bodies into cities during sieges, and is the reason for the Black Death being introduced to Europe.

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epw6n TIL one of the moons of Mars (Phobos) orbits Mars much faster than Mars rotates, and completes an orbit in just 7 hours and 39 minutes. From the surface of Mars it appears to rise in the west, move across the sky in 4 hours and 15 minutes, and set in the east, twice each Martian day.
MeLd0 TIL that Belarus lost a full 1/4 of its population to World War II
KOjYE TIL to avoid being targets of violence, reporters notebooks took on a smaller format in the Civil Rights Movement and it stuck
0vrN TIL, in China, before it there was a vaccine, smallpox scabs were ground up and blown up the noses of healthy people in order to immunize them.
OG9L7 TIL Leon Trotsky was murdered in Mexico in 1940 via ice axe by soviet agent Ramon Mercader. After Mercader was released from prison in 1960 he was awarded the Hero of the Soviet Union medal and the Order of Lenin medal