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TIL Ivan the Terrible was so impressed with the construction of St. Basil’s Cathedral that he had the architect blinded so that he could never design anything as beautiful again.

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ADpLo TIL of the Wifatch computer virus, that instead of installing malicious software actively protects infected units from attack.
9YdZB TIL There are no pain receptors in the brain itself. Surgery can be done on the brain and technically the brain does not feel that pain. But the meninges (coverings around the brain), periosteum (coverings on the bones), and the scalp all have pain receptors and this is why you have migraines.
nGA7 TIL nobody has died from a confirmed spider bite in Australia since 1979. Deaths occur due to being surprised by them, while driving, etc.
OGgQL Today I learned barbers and surgeons went their separate ways in 1745
NXE6 TIL President Jackson entered a duel against a man he knew to be the better shooter. Jackson allowed the man to shoot first, unflinchingly taking a bullet in the chest. Jackson then fired and killed the man instantly. Jackson lived with the bullet in his chest for the rest of his life.