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TIL rust can kill you. Rusting metal consumes oxygen and can lead to death especially in confined spaces like holds of ships. In 2007, three people suffocated one after the other in the anchor locker of a vessel because rust had consume all the oxygen.

e0KX5 TIL Native American Colonel Donehogawa hand-wrote the surrender terms at Appomattox in April 1865 signed by Confederate General Robert E. Lee, who "stared at me for a moment, he extended his hand and said, 'I am glad to see one real American here.' I shook his hand and said, 'We are all Americans.'"
ynk8 TIL after the 2012 earthquake in Italy damaged €110,000,000 worth of Parmigiano cheese, world-renowned chef Massimo Bottura spread the word on social media how to easily make Risotto. As a result, almost all the cheese was utilized and the company didn’t have to lay off a single employee.
1aRad TIL that George Washington Carver's research into uses for peanuts was motivated by a desire to help poor sharecroppers in the South. At the time, the overproduction of cotton was depleting the soil of nutrients, and the boll weevil infestation threatened to destroy cotton crops.
R5ro7 TIL most adult dolphins don't have any taste buds and can't taste their food.
D1m8P TIL "Begging the question" does not mean "Raising the question", but is a common logical fallacy, where the premises of an argument already assume the conclusion to be true, for example, "My experience of reality must be true, because what I see, hear, smell, and touch feels so real."