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TIL a surgical antiseptic was distilled and sold as a floor cleaner and a cure for gonorrhea, then was then re-marketed as what we know now as Listerine.

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9gKG TIL that the very last full-blooded Tasmanian aboriginal person, Truganini, died in 1876. She lost her mother, uncle, sister, and fiancé to European explorers. To this day the ‘Black War’ against Tasmanian aborigines has never been officially memorialised
dDE4r TIL Percieved sourness is caused not only by free protons, but also by protonated carboxyl groups. That means that organic acids will taste sour, even without really low hp. This explains why even some weak bases like sodium acetate taste sour, because the acetate ion will protonate.
VMrDB TIL that in the Middle Ages it was believed that lion cubs were born dead and their father resurrected them with his breath after three days.
vPm64 TIL that a baby still in the womb received heart surgery to remove a tumor
nW7ZP TIL the word tsunami actually means "harbor wave" because the ancient Japanese fishermen did not notice the shock wave passing them while they were out at sea because the wave does not unleash its destructive energy until it reaches shallow waters.