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TIL Richard Feynman wrote a heart wrenching letter to his wife years after she passed away, which nobody read until after he passed away

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via reddit.com

4kwkg TIL Low-dose Aspirin comes in 81 mg because prior to the Metric system, England in the Middle Ages used an apothecary system of weights, with the base weight derived from 1 grain of barleycorn. Adult Asprin dosage was 5 grain (325 mg), with a low-dose one-quarter portion being 1.25 grain, or 81 mg.
rLpe TIL that a man named Laszlo Polgar developed a method to raise child prodigies. He wrote a book on it, married a language teacher, and they raised two of the 11 current female chess grandmasters in the world.
Wko4Y TIL about Maximilian Kolbe, a Catholic priest during WW2. He was taken to Auschwitz where he later took the place of a stranger. Kolbe was starved for two weeks and then killed by an injection of carbolic acid.
9wRxB TIL a 2021 systematic review found that 90% of people have some degree of anatomic leg-length difference, with an average of about 5 mm.
OolxR TIL I learned Angry Bird is the most popular mobile video game of all-time