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TIL while humans produce vitamin D by exposing their skin to sunlight, cats and dogs must ingest their own fur as a source of their vitamin D. This is the reason why they love to lay in the sun and groom themselves (probably because it feels good too)

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j6xVN TIL: That the U.S. Atomic Energy Commission had planned to carve out an artificial harbor in Northern Alaska using buried nuclear explosions. The plan (Project Chariot) had a lot of public support and would have been carried out if the Inupiat village of Point Hope hadn't strongly opposed it.
rN0Rx TIL the reason that Mike Myers ended up playing the Cat in the Hat was because he was sued after cancelling on a prior project. He settled, and one of the terms of the agreement in the settlement was he would take a lead in another film by director Bo Welch, who ended up directing The Cat in the Hat
gMxpD TIL about truth default theory. Most people will not be able detect deception among those who are part of their culture, instead believing until there is a massive amount of evidence that says otherwise.
R5KM8 TIL Marcus Licinius Crassus, often called "the richest man in Rome," formed the first fire brigade, saving burning buildings only if owners sold at a low price. Otherwise, he let them burn. The buildings would then be leased back to the former owners.
NXxRE TiL bees like to 'play' with balls. A study shows bumble bees went out of their way to roll wooden balls repeatedly despite no apparent incentive. Younger bees rolled more balls than older bees and male bees rolled them for longer than female bees.