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TIL that rechargeable electric cars existed and were quite popular in the late 1800’s. Worldwide discoveries of large petroleum reserves and road infrastructure that required longer driving time led to their decline.

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p8aYG TIL Murder rates in Miami, Florida were so high during the 1970s and 1980s that the Dade County Medical Examiner’s Office had to rent a refrigerated trailer from Burger King to handle the overflow of corpses
QvWd TIL Facebook introduced a new newsfeed then cancelled it - the user experience was so good that users no longer spent so much time on Facebook, reducing ad profits.
8ygX TIL WD-40 was originally developed to prevent corrosion in nuclear missiles
b9AX9 TIL helium can’t be artificially produced and is formed in natural gas wells as ancient uranium decays. The half-life of the most prevalent uranium isotope is billions of years old (older than Earth itself), so helium takes inordinate amounts of time to form.
O5MR TIL the daughter of J.R.R. Tolkien believes that the description of the Dead Marshes (in LOTR) is based on the author’s experiences during the First World War.