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TIL Poison Dart frogs are completely non-toxic when captive bred (dart frogs are commonly bred in captivity), even wild-caught poison dart frogs gradually lose their potency in captivity.

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Lk91v TIL: About "violent grief response" A phenomenon where family members attack doctors or hospital staff immediately after being informed of a loved one's death
749Z TIL Professor Xavier(X-Men) has a son named Legion who has over 200 multiple personalities and each personality has a different superpower
K1Qa TIL on 9/11 the Boston Air Traffic Center bypassed the “hijacking protocol” and called directly NORAD’s North Eastern Air Defense Sector (NEADS). NEADS and First Air Force decided to “get permission later” and scramble jets. Boston Center was NEADS’ only source of information throughout the attack.
ylZp TIL that after Abraham Lincoln was called out for refusing to indicate whether or not he wanted to go Heaven or Hell he said “"I did not come here with the idea of being singled out, but since you ask, I will reply with equal candor. I intend to go to Congress.”
eywn TIL that the shape of Pringles potato chips (a hyperbolic paraboloid) was designed using a supercomputer to be aerodynamically stable so they don’t fly off the manufacturing line.