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TIL a part of the human population can voluntarily control the tensor tympani, a muscle within the ear. Contracting this muscle produces vibration and sound. The sound is usually described as a rumbling sound

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4k8aJ TIL that titular typing tutor of 80s PC program "Mavis Beacon Teaches Typing" was the creation of one of the software developers, who sought to present a "friendly face" for a generation of very new and very wary computer users. Mavis was inspired by a Haitian-born woman named Renee L’Esperance.
OGeKX TIL that smokers whose insula got damaged after a stroke were able to quit smoking easily one day after the stroke, with no relapse and urges, suggesting that this brain region might play a role in nicotine addiction.
j6P5a TIL The British King during the American Revolution was George III. His wife, Queen Charlotte bore 15 children and 13 lived to adulthood. From those 13, only 8 legitimate heirs were born including the Queen Victoria.
E1lZ0 TIL that Prince John William Friso (d. 1711) is the ancestor of every European royal house (Albania, Austria-Hungary, Belgium, Brazil, Bulgaria, Denmark, France, Germany, Greece, Italy, Liechtenstein, Luxembourg, Monaco, Netherlands, Norway, Portugal, Romania, Russia, Spain, Sweden, UK, Yugoslavia)
NKAJ TIL that the Statute of Marlborough 1267 is the oldest law still enforced anywhere in the world. It prohibits seeking damages without a court order in England and Wales, and is still used to prosecute people to this day