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TIL Height strips on convenience store doors were first used to help witnesses judge the height of a robber, but today they are used as psychological deterrents.

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JYxLB TIL There are researchers who say there is no known limit to human lifespan. They argue that the previous conclusion that human lifespan stops at 115 years was based on misinterpreting the data by seeing a plateau at 115 years where there was none
mN6R TIL in 2006 the FBI convicted a crime family using evidence collected by remotely enabling the microphone on a cellphone. This is called a “roving bug.”
GBn5 TIL The Library of Congress is archiving every public tweet ever posted
4X5vw TIL that "Blue Blood" as a synonym for royalty, came from Spain following the Reconquista, in which some spanish nobles would show their pale skin, with blue veins showing, as proof that they had never mixed with the Moors who occupied Spain for centuries.
W7v18 TIL Aware of his own shortcomings in formal education, Abraham Lincoln mastered six books of Euclid’s Elements on his own in his early forties. Lincoln believed Euclid challenged him intellectually and made him into a better lawyer