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TIL about Leonhard Euler (1707-1783) who not only popularised the use of lower case Pi to denote the ratio of a circle's circumference to it's diameter, but was also the first to use "i" to denote the square root of -1. The constant "e", the base number in a natural logarithm is the Euler Number

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D187g TIL the "Formula" in F1 refers to the the set of rules and specifications that racing teams and drivers have to follow, especially when it comes to car construction
N7kbM TIL Bulls are colorblind, and can't see the color red, it is the movement that angers them during matador fights. The reason behind the color red is so that the blood spilled is less visible.
pLWG TIL Two brothers once sold a fake Goya painting for €1.5 million, only to later find out that all the money was counterfeit
lVEA TIL that there is a family in Florence that has been keeping records of all of their ledgers, bills and correspondences in a continuous archive since 1362.
1A1P TIL that it is literally impossible for our brains to multi-task; when we think we’re multi-tasking, we’re actually context-switching, which is quickly switching back-and-forth between different tasks, rather than doing them at the same time.