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TIL the Therac 25, a computer controlled radiation therapy machine, killed six people as a result of a computer bug that allowed the machine to inject lethal doses of radiation into patients.

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n8kr TIL A 17 yr old girl was the sole survivor of an airplane that was struck by lightning. While still strapped to her seat, she fell 2 miles (3km) from the aircraft and landed down into the Amazon rainforest, where she trekked through the jungle for 10 days until she was rescued by local lumbermen.
0wmM TIL That the glottis (the opening in which air passes through when we breathe) expands when we are under heavy stress for increased oxygen intake. This causes the lump you feel in your throat when you are stressed/crying!
wNQ7 TIL that in 2010, Taco Bell secretly reduced the sodium content of its food at 150 Dallas area restaurants by 23%. Without telling anyone, they replaced the salt with “other spices and other ingredients.” Two months later, they had received exactly zero complaints about the changes.
yQ8RM TIL the shot in Jurassic Park where the cup of water vibrates, heralding the arrival of the T-Rex, was actually an extremely difficult shot to get right. They eventually got it by feeding a guitar string through the car, down to the ground and someone plucked a specific chord to get the effect.
ekyb TIL that fish sticks were first sold as an intentionally bland control product while testing a more flavorful frozen food called “herring savouries” in the market. The market’s preference for the blander cod product completely took researchers by surprise.