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TIL Bullet proof vests are not reusable after being shot. They also cannot protect you from knifes.

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E1JD0 TIL about the Eisriesenwelt, a natural limestone and ice cave in Austria. It is the largest ice cave in the world, extending more than 42km and the frozen lake inside the cave, during the Second World War, was used by skating athletes to train for the Olympics.
xVYp5 TIL that honey never goes off and has been found in Egyptian tombs fully edible.
LwWr TIL of the 4,500 troops in the British army who were retreating from Kabul to Jalalabad in 1842, the only one who made it back uncaptured was assistant surgeon William Brydon. When asked upon his arrival what happened to the army, he answered, “I am the army.”
4oyX TIL In a study of 200,000 ostriches over a period of 80 years, no one reported a single case where an ostrich buried its head in the sand.
yK8v TIL that during World War I, the Russian and German armies were repeatedly attacked by starving wolves. It became such a problem that the two armies negotiated a temporary truce and worked together to kill several hundred wolves