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TIL: That Anne Frank only assumed that her father was killed in the concentration camps and that a childhood friend of hers stated that if she knew he was still alive she believed Anne would have summoned the courage to survive

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vPRAL TIL foot massages can lead to uterine contractions and cervical ripening in pregnant women, and can lead to preterm labor
6xQ8 TIL that the Voyager 2 carried a tape recorder whose reels rotated at high speeds which caused issues with its operations. Due to the conservation of angular momentum, the space probe started an undesirable rotation in the opposite direction whenever the tape recorder was turned on.
awpN0 TIL McDonald's Filet-O-Fish was invented by franchiser Lou Groen because of falling hamburger sales on Fridays (Lent)in his area. Ray Krock made a deal - they would sell his own "Hula Burger" (grilled pineapple) and the Filet-O-Fish one on Friday, the bestseller would be added to the permanent menu.
Oogpe TIL 'Turritopsis dohrnii', the immortal jellyfish, is a species of small, biologically immortal jellyfish that lives forever. They never die of old age but transform themselves back into their juvenile state. It is the only known species that has figured out how to defeat death.
E9Dw TIL color laser printers print a watermark on every page that identifies the printer to ease government fears of forgery.