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TIL: An adult person could die from eating 4-8 raw castor seeds because of a toxin known as Ricin which is 6000 times more poisonous than Cyanide.

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XEy88 TIL about Leonardo Da Vinci's Self Supporting Bridge. This Bridge has NO Nails, Screws, Glue Or Fasterns. Just Friction And Gravity
prOp TIL in 1947 the British used 6800 tonnes of surplus WW2 explosives to destroy military infrastructure on the tiny island of Heligoland. Loss of the island was acceptable. The explosion resulted in one of the largest single non-nuclear detonations recorded. Newsreel footage in comments.
0aEN TIL small number of female prostitutes in Nairobi have become resistant to AIDS, though they often have sex with infected men.
ADxOx TIL Scotland's national animal is the unicorn
9YWEQ TIL that Isaac Newton was elected to parliament to represent Cambridge. It is reported that the only time Newton spoke in parliament was to say, "The window needs closing."