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TIL Hildegard of Bingen wrote one of the earliest known constructed languages in the 12th century

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E8jW TIL that anyone who has ever received a blood transfusion in the United Kingdom or France is permanently ineligible to donate blood in the United States.
e0xrL TIL in 1916, German spies blew up a munitions depot at Black Tom Island in New Jersey, killing five people. The explosion was registered at 5.5 on the Richter scale—30 times more powerful than the World Trade Center collapse on 9/11. So loud that it shook buildings in five states as far as Maryland.
j6AdE TIL that it's not free to move out of america and that it costs $2350 to renounce US citizenship and may cost more if you need be tax compliant.
jWKX TIL that adding a type of seaweed to the diet of cows reduces their methane production by 70%.
R7pY8 TIL the boundary between the Earth's atmosphere and outer space is called the Kármán line