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TIL about Carcinisation, a form of convergent evolution in which non-crab crustaceans tend to evolve a crab-like body morphology. It has been described as "the many attempts of nature to evolve a crab"

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LkdWQ TIL about "naumachia", the Ancient Roman practice of filling a specialised coliseum/amphitheatre basin full of water and forcing convicts and PoWs to fight to the death in staged naval battles, complete with fully armed warships, for the Caesar's entertainment
RPL4 TIL until the enactment of Robby’s Law in 2000, retired military working dogs were routinely euthanized, b/c the dogs were classified as equipment & were thought to be unable to adjust to civilian life. The law is named after a military handler who tried to adopt his dog before it was euthanized.
grlvL TIL about the South Korean arcade game Boong-Ga Boong-Ga. The object of the game is to score points by spanking or performing kancho, poke the anus, on a model of a human posterior embedded in the game's cabinet. A plastic finger is attached to the machine for players to perform the latter
NVDb TIL the average triangle player in an orchestra makes $56,000 dollars a year.
8174 TIL that during the Rwanda Genocide, Hotel Manager Paul Rusesabagina hid 1,268 refugees in his hotel, none of which were hurt or killed.