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TIL in WWII,Germans tank drivers in Africa would drive tanks over camel poop for luck. Allies responded by planting land mines disguised as camel dung. Germans got wind of this and began riding over dung that was already overrun with tank tracks. In turn, Allies made mines looking like overrun dung

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XEAZR TIL Researchers created an algorithm that can reconstruct an audio by analyzing minute vibrations of objects depicted in video. In one set of experiments, they were able to recover intelligible speech from the vibrations of a potato-chip bag photographed from 15 feet away through soundproof glass
jNVLa TIL that leaders of the Black Panther Party were "neutralized" (murdered, imprisoned, publicly humiliated or falsely charged with crimes) by COINTELPRO, a series of illegal FBI operations.
JYpRk TIL that drug smugglers have SUCCESSFULLY used carrier pigeons to smuggle drugs. Wow.
a8Vo0 TIL that limelight is a type of lighting once used for stages. Intense illumination is created when a flame fed by oxygen and hydrogen is directed at a cylinder of quicklime. Long since replaced by electric lighting, the term has survived; someone in the public eye is said to be "in the limelight."
8elEa TIL of Eastern Air Lines Flight 212 which crashed into terrain on September 11, 1974, killing 72. Among them was the VP for academic affairs of the Medical University of South Carolina and two of his sons - the father and brothers of future tv personality Stephen Colbert.