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TIL humans have no sense for wetness, only temperature and pressure

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Lk79d TIL Graphene is thinner than a human hair and stronger than steel. Completely clear, and flexible. If there was an easy way to cultivate it, it could change the manufacturing of so many products.
69BdJ TIL that the upside down Cross was originally associated with St Peter who, according to catholic tradition, was crucified upside down upon request. He felt unworthy to die in the same way as his savior.
4XWZ6 TIL: That you can train honeybees to detect explosives
6RDQ TIL When Canadian Prime Minster Lester B. Pearson Came To Philadelphia To Speak Against The Vietnam War, Before He Could Finish His Speech President Lyndon B. Johnson summoned him to Camp David, Maryland where he grabbed him and said “Don’t you come into my living room and piss on my rug.”
ZRYG TIL every single Official London Black Cab driver must pass a test called “The Knowledge” in which they have to learn 25.000 streets, 20.000+ landmarks and 320 basic routes that are located within a six-mile radius of Charing Cross. Some people take up to 5 years of studying to pass it.