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TIL the idiom "You don't know shit from Shinola" refers to Shinola shoe polish.

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EgmgW TIL that outside the US and Canada, Duracell uses a pink bunny as a mascot. The Energizer Bunny was created in 1988 to mock Duracell, after Duracell’s pink bunny trademark in the US had expired. The two companies later agreed that Duracell would keep using a bunny mascot in other regions.
YpDlB TIL that the first person to see human chromosomes through a microscope made a counting error, and published a paper in 1923 stating that there were 24 pairs of them. The error remained widely accepted as a scientific fact for 33 years until it was corrected.
60gJ TIL Elon Musk was an executive producer on “Thank You for Smoking”
5Yrwr TIL About the Wick Effect, when a human body is destroyed by fire due to their clothing having soaked up melted human fat which then acts like the wick of a candle – external heat/fire sources warm the body and then ignite it. It has been touted as an explanation for spontaneous human combustion.
epMPn TIL that the number of 100,000 km for the length of human blood vessels used some VERY generous assumptions, and that it is actually around 9,000 to 19,000 km.