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TIL In the United States cows can be given growth hormones but chickens can not.

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wLXnM TIL Leif Erikson Day is an actual day, it is observed October 9th. It honors Leif Erikson the Norse explorer who led the first Europeans thought to have set foot in continental North America.
KvLR TIL Dr. Kelsey, despite immense pressure from pharmaceutical companies, decided not to approve thalidomide for morning sickness in the U.S., saving a whole generation of children from death and deformities
J1VDv TIL when a drunk zebrafish is introduced to a group of sober ones, the sober fish will follow the drunk individual as their leader
dD0oB TIL Traditional Moroccan sinks, bathtubs, water vessels, and many interior surfaces are literally made out of soap scum—the traditional soap-treated lime plaster “Tadelakt” is formulated for its water repellent properties and contains the same compounds as soap scum (Ca stearate, Mg stearate, etc).
v1Zkr TIL of an newly discovered organism called Lithoredo abatanica that eats stone and excretes sand. It is a shipworm, a group of burrowing animals known for eating woods and related to clams, but so different from known examples that it is both a new species and genus.