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TIL That Historians Believe Cats Domesticated Themselves

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YBNr TIL that a man once escaped a police interrogation room by putting a coat over his handcuffs and walking out the door. He later mailed back the cuffs.
wGo1 TIL: At the age of 76, Holocaust survivor Liviu Librescu gave his life to protect 23 students during the Virginia Tech massacre. After his death, he was honored with the highest civil order Romania can bestow, the Order of the Star of Romania.
eYYL TIL humans can enter sleep cycles of 24-48 hours in the absence of sunlight
gMvp9 TIL in the original Greek democracy, elections were seen as undemocratic and oligarchic. To them everyone was equal so they selected their leaders randomly in a process called Sortition.
QJxJ6 TIL that hummingbirds build nests near and below hawk nests because their predators are scared of the hawks and tend to avoid hawk nests. Survival rates are higher for eggs laid in a cone-shaped area near/below hawk nests