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TIL Birds aren't actually blue, but appear to be due to an optical illusion caused by light interacting with the 3D structure of their feathers.

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OoZW6 TIL Anthony Kiedis, lead singer of the Red Hot Chili Peppers, had a sexual relationship with a 14 year old and wrote the song "Catholic School Girls Rule" about it.
eA66 TIL Marie Antoinette’s last words were “Pardon me sir, I meant not to do it”, to her executioner, whose foot she had accidentally stepped on after climbing the scaffold to the guillotine. Also, her body was thrown into an unmarked grave.
WKXX TIL in July 2016, Maurice Micklewhite offically changed his name to his stage name Michael Caine. An airport security guard would say, ‘Hi, Michael Caine,’ and suddenly I’d give him a passport with a different name on it. I could stand there for an hour. So I changed my name.”
7LYM TIL the 1980 satirical disaster comedy “Airplane!” is largely based on the 1957 drama “Zero Hour!” It follows the same plot, uses the same character name for the hero passenger, and parodies numerous scenes using the same dialog word for word.
PYrRE TIL there is a sound frequency that is said to induce a feeling of fear even when it is inaudible.