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TIL that Russia’s answer to Eurovision was called Intervision and it was judged by Electricity Grid Voting: “Those watching at home had to turn their lights on when they liked a song and off when they didn’t, with data from the electricity network then being used to allocate points”

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m10ao TIL that twin popsicles were created during the great depression so that two children can each enjoy a popsicle for a nickle.
M7wrm TIL the US Postal Service's (unofficial) motto, "Neither snow nor rain nor heat nor gloom of night stays these couriers...", comes from Greek historian Herodotus' description of the Achaemenid Persian's Angarium couriers who ran a Pony Express style courier service for their king.
woV58 TIL Andromachi Papanicolaou, the wife of the man who invented the Pap smear volunteered to have her cervix sampled every day for 21 years to help with his research. Their findings went on to save the lives of millions of women by preventing the development of cervical cancer through early detection.
P1PDL TIL When Christopher Columbus set sail for the New World, a reward was set for whoever first sighted land. Although one of his crewmen was first to report, Columbus falsely claimed he'd spotted land the previous night,thereby securing the reward for himself
x65dk TIL estrogen is responsible for the "masculinization" of male brains in early development. Newborn female mice exposed to estrogen will even go on to exhibit male behavior, such as mounting other female mice. Estrogen also plays important roles in memory, stroke prevention, and overall brain health.