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TIL that "Hero Rats" can be used as a failsafe to check for tuberculosis at a rate of 100 samples per twenty minutes, a task that takes human microbiologist four days.

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4Xdm5 TIL That Leonardo Da Vinci once conducted an experiment to understand the flow of blood through the valves of the heart, by pouring hot wax into one, making a mould of thin glass from the cast, and then pumping water mixed with seeds through it. He saw how a heart actually regulates itself.
mxmly TIL Instead of a jail sentence, a Texas man agreed to be sentenced to sleep in an outdoors doghouse for 30 consecutive nights, as a punishment for abusing his son.
GAJLj TIL a 2017 lawsuit resulted in the Village People's official line-up completely changing. Their original lead singer got rights to their name, and the two original members still in the group at that point were effectively replaced. One retired and the other went solo.
QJDPa TIL: The Offpsring's Lead Singer Is A Legit Doctor Searching For A HIV Cure
GGr1 TIL that US courts have ruled that police departments can refuse to hire someone considered to be ‘too smart.’