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TIL the term 'pitch black' refers to pitch, a sticky black substance that is obtained from the distillation of wood tar or petroleum.

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PVEe TIL - A Brazilian invented caller ID technology more than 25 years ago. Today he is in 40 lawsuits claiming for his royalties that, in total, are more than 25 billion dollars
ADJXx TIL a Danish company modified a version of thale cress (plant), that changes from green to red when being near landmines, because of the nitrogen dioxide gas released from landmines. This way you can detect landmines and save lives.
yGpp TIL The first female journalist to interview a U.S. President did so by sitting on John Q. Adams’ clothes while he swam nude in the Potomac forcing him to do the interview.
BJBb TIL Bertrand Russel said “in the modern world the stupid are cocksure while the intelligent are full of doubt”. This is actually a bias called the Dunning–Kruger effect which says unskilled individuals feel an illusory superiority, mistakenly assessing their analysis to be much better than it is.
R7Zwa TIL when The Kinks were being formed, Rod Stewart was briefly considered as the group's singer, being a schoolmate of three of their members.