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TIL Egyptian blue, also known as calcium copper silicate (CaCuSi4O10 or CaOCuO(SiO2)4 (calcium copper tetrasilicate)) or cuprorivaite, is considered to be the first synthetic pigment.

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6EykW TIL: There's a 27 metre, ~1600 years old Anglo-Saxon ship buried in the Suffolk countryside
78oKM TIL in 1865, one of the first automobile laws in the UK imposed a 4mph speed limit and required someone to walk ahead of the vehicle waving a red flag
JYZrQ TIL the cover of the Arctic Monkeys album "Whatever People Say I Am, That's What I'm Not," was criticised by Laurence Gruer of NHS Scotland for its image of a man smoking. The band's product manager retorted, "You can see from the image smoking is not doing him the world of good."
l7vOB TIL Smokers aged 75 and older have, on average, 5.8 fewer teeth than their non-smoking counterparts.
epyD4 TIL Redwood trees have no taproots. Their roots grow only 10 to 13 feet vertically, and then spread horizontally for 60 to 80 feet, intertwining with the roots of other redwoods in a grove for stability.