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TIL: Kodak's "Shirley Cards" was used as a standard for skin tone in photography.

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gM4OD TIL There is an estimated 100 billion galaxies in the universe. "That’s 13 galaxies for every living person. Averaging 100 billion stars per galaxy, that’s 1.3 trillion stars, for you alone."
R5kA7 TIL that in 1963, the FBI launched a 2-year investigation where they unsuccessfully attempted to discern the lyrics to the song “Louie Louie” by The Kingsmen out of fear that the song contained obsene lyrics
wVvo TIL Turritopsis nutricula, the immortal jellyfish, is known to be the longest living creature which could live on forever without dying of old age
bokN TIL That Hybristophilia, the sexual arousal and orgasmic response to having sex with murderers and serial killers, “occurs almost exclusively in Women”, making it unlike most other paraphilias.
9aEQ TIL that NASA has special wristwatches that keep Mars time for employees working with the rovers