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TIL the classic bald eagle screech sound effect we hear in most movies and tv shows is actually the sound of a red tailed hawk screech dubbed over. Bald Eagles make more of a little cackling type of a laugh sound.

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YpXBB TIL that vivisection, dissection of live individuals, usually without anesthesia and often ending in death, were common in the Japanese Unit 731. After the war, involved researchers were secretly given immunity by the US in exchange for the data they gathered through human experimentation.
kOKG4 TIL the only account of Marco Polo's visit to China is his own first person one. There are no Chinese accounts of his trip and some scholars believe he never actually went at all but made it up using accounts from Persian travellers.
ElgX TIL a 2006 trial of an autoimmune drug that was found to be safe in mice, caused human volunteers fingers and toes to die within minutes of taking it and left them with multiple organ failures.
E1Wkw TIL that now Supreme Court Justice Sonia Sotomayor was instrumental in ending the 1994-95 MLB Baseball Strike
xVV71 TIL both the first and last rulers of Rome were named Romulus