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TIL it is estimated around 400 doctors a year commit suicide due to the high demands of their field. Long hours, along with pre-existing mental illness, and constant doubts of inadequacy, are leading factors as to why physicians are among the highest risk to commit suicide out of any occupation.

NepJ TIL Chinese guerrillas during WWII were given bags of flour, mixed with the powdery white high explosive HMX, to bypass Japanese checkpoints. The resulting mixture could safely be cooked into pancakes and eaten. Leftover dough and pastries could still be used as explosives. Code name: “Aunt Jemima.”
lo9NV TIL Spotted Hyenas have a bite force of about 1,000 lbs per square inch. That is enough to bite through bone. Hyenas are also known to hunt lions and have been photographed with full animal heads (including a lions) in their mouth.
wLGG6 TIL that Ford almost bought Ferrari in the early 60's, but Enzo Ferrari killed the deal when he learned he wouldn't oversee the racing division anymore. Henry Ford II was so pissed that he directed his engineers to build a car that would beat Ferrari at Le Mans, which it did from 1966–1969.
BrBZr TIL '4-F' is a classification given to someone indicating they are “not acceptable for service in the Armed Forces” for any number of reasons. It originated in the Civil War and was used to disqualify army recruits who did not have four front teeth with which to tear open gunpowder packages.
ZpYM4 TIL People brought their kids to watch Alien in the theaters (many apparently thinking it was going to be something more akin to Star Wars)