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TIL that the Uruguayan navy once use stale cheese as cannonballs once they had run out during a battle against Brazil. The Uruguayans won the battle.

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b9gX0 TIL that the World Health Organization recommends ash or sand as alternative to soap when it's not available
evng TIL that a Dutch microbiologist Hendrik Jonkers invented a self-healing concrete that uses bacteria to seal cracks
kPE7 TIL the height of the Eiffel Tower varies daily by 15cm based on the temperature
j6pmp TIL the Ovsiankina effect describes the innate human urge to finish tasks we've initiated. This tendency to resume an interrupted action is especially prevalent when the action hasn't yet been achieved.
wL8B7 TIL that while the fictional Jon Snow knew nothing, the microbiologist John Snow traced the outbreak of cholera to Soho, London, in 1854, and inspired the overhaul of waste management systems around the world.