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TIL that if a cat headbutts you the cat is marking you with their scent and headbutting is typically used for bonding and social purposes.

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4exo TIL that in 1856, the color mauve was invented accidentally in a young chemist’s attempt to cure malaria. Instead of curing the disease, the ink was picked up by the Queen and took Victorian fashion by storm.
EdwP TIL the tradition of “women and children first” protocol is a legacy from the Birkenhead, a ship that ran into a dangerous reef, and whose soldiers famously stood firm allowing the women and children to board the boats safely as there were not enough serviceable lifeboats for all the passengers.
DKXY TIL that when male honey bees mate, their penises explode and they die. During the queen’s nuptial flight, she’ll mate with about a dozen partners and leave a trail of dead, penisless bees in her wake.
LkQ80 TIL that 'redundant phrases' such as "ATM Machine", "LCD Display" and "PIN Number" are examples of RAS Syndrome (Redundant Acronym Syndrome), which itself is a redundant phrase.
ZpP5v TIL that video gaming causes increases in the brain regions responsible for spatial orientation, memory formation and strategic planning as well as fine motor skills.