› added 4 years ago

73

TIL that fathers day varies very much from country to country

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BXXr TIL The ringing in your ears is caused by the brain trying to repair itself from loud noises.
9no6 TIL that the United States led the world in forced sterilizations before Nazi Germany.
6EQBZ TIL that a.m. stands for ante meridiem, Latin for before midday, and p.m. stands for post meridiem, Latin for past midday.
KYD0G TIL laboratories practiced mouth pipetting when accessioning specimens “until the 1970s, when cheap mechanical pipettes became available.”
XDRE TIL the reason cats flex (also called kneading) their claws when sitting on your lap is due to a behavior from when it was a kitten. The kitten has to flex its claws around the mothers nipple in order to get it to start lactating. In adulthood its just re triggered from being nurtured