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TIL of Lydia Litvyak, The Jewish Soviet Fighter Ace. During WWII she claimed 14 kills, trained 45 pilots, and shot down an ace who wouldn't believe a woman beat him until she described the fight. She went missing on a flight Just before she was to receive the award "Hero of the Soviet Union"

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Reml TIL After MLK’s death, his autopsy found that while he was just 39 years old, he had the heart of a 60-year-old. Doctors concluded the pressure he had experienced in his career had stressed and aged his heart.
XyWR TIL that if you were born in the US in the 60s or later, the government already has your DNA in a database through the mandatory newborn screening program.
0do8L TIL That professor Colin Raston invented a method to unbind protein strands, a process called Protein Denaturation. To make the process easily understandable he showed that he could 'unboil' a boiled egg, thus winning himself an Ig Nobel award in Chemistry from Harvard university.
4k466 TIL: Sperm whales are so named because of a waxy substance known as spermaceti found in their heads. This substance was used in oil lamps, lubricants, and candles in olden days leading to these whales being the primary target of the whaling industry
QJPLa TIL: In the Star Trek universe, Enterprise is called Enterprise because of a line of space ships with that name starting with one of the first manned spaceships from Earth. In real life, the first space shuttle was called Enterprise because of Star Trek.