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TIL that suppressing a sneeze can damage your eardrum or damage your blood vessel in your brain. It can at times even lead to death.

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4kg TIL that Tesla said that if you stick a rod far enough into space the temperature difference would create an electrical current and a motor could be run off it and that this (while not doing any work itself) did not violate the second law of thermodynamics.
Bra5y TIL that Actor Noah Wyle, after simulating the procedure for over a decade as a t.v. doctor, successfully inserted a working I.V. into a fallen crew member on set.
J1By4 TIL Pau Brasil is the national tree of Brazil. A dye taken from the tree’s heartwood has been exploited by collectors since 1501. It also provides immensely valuable, almost indestructible timber used to manufacture bows for stringed instruments, for construction, to make traditional hunting tools.
R7ln1 TIL Sir Isaac Newton's dog set his laboratory on fire, ruining his 20 years of research. When he saw what the dog had done, Newton is said to have exclaimed, "O Diamond, Diamond, thou little knowest the mischief thou hast done."
xZ9w TIL France has a law requiring tech workers to ignore emails from their bosses after 6pm