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TIL that the ancient Romans used to believe in Emission theory, the idea that visual perception is accomplished by light shining out of your eyes, like the headlights on a car.

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yVA8v TIL in 1989 a man bought a painting for $4 at a flea market mostly because he liked the frame. He discovered a document behind the canvas. It was an official copy of the first printing of the Declaration of Independence. Only 23 were known to exist. He sold it at auction for $2.42 million in 1991.
P1Maw TIL In 1942, German submarines sunk a British passenger ship. They surfaced to collect survivors, announced their presence to the allies and sailed under a Red Cross flag. The U-Boats were attacked by allied planes, forcing the submarine to throw all the survivors back into the sea and crash dive.
4kvrJ TIL Jeopardy! contestant James Holzhauer is the 3rd highest-earning American game show contestant ever at $3.52 million & also holds the single-game winnings record at $131,127. He's the first & only player to win $100,000+ in a single episode and he accomplished this feat six times.
raD4 TIL that when you run at night, you run faster because you primally sense your environment using your proprioception instead of with your eyes
oB188 TIL the birds in Alfred Hitchcock’s movie ‘The Birds’ were fed a mixture of wheat and whiskey. It was the only way to get them to stand around so much instead of flying away