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TIL The liver is the only human internal organ capable of natural regeneration of lost tissue; as little as 25% of a liver can regenerate into a whole liver.

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M7JPb TIL about Roger Fisher, a Harvard Law School professor who proposed putting the US nuclear codes inside a person, so that the president has no choice but to take a life to activate the country's nuclear weapons.
LK5Q TIL that the ‘falling sensation’ and jerk reflex felt before sleep may go back to our ancestors having to re-adjust themselves when sleeping in trees, so they didn’t fall out.
E40X TIL - Jack Daniel died from blood poisoning after forgetting the combination to his safe, kicking it, and injuring his toe.
wo6a8 TIL the zipper, originally called the “Hookless Fastener” and patented as the “Separable Fastener” in the 1910s, was first used on tobacco pouches and boots. By the 1920s and 1930s, it gained popularity in children’s clothing and men’s trousers.
knZd TIL that “Koko, a female gorilla trained in sign language, once tore a steel sink out of its moorings. When her handlers confronted her, Koko signed ‘cat did it’ and pointed at her innocent pet kitten.”