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TIL scientists estimate only 14% of the 10-14 million species on earth have been documented and over earths history there have been 5 billion different species.

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8aa8X TIL of the term "Sitzkrieg" which describes the lack of major military action during an active war, mainly describing the eight months of time between when Great Britain and France declared war on Germany before any major operations were executed.
Lkm0P TIL that during the filming of 'Where Eagles Dare' actor Richard Burton was drinking up to four bottles of vodka a day, and ending up knocking himself out at one point while drunk. as well as disappearing for several days during one of his drinking binges
OM9X TIL that Penn Jillette of Penn & Teller did a “penny behind the ear trick” for television while having brain surgery. Teller had him remain conscious so that he could see the penny after Teller produced it and say it was the one he marked. The resulting footage was too disturbing to be aired.
R7oKj TIL a disco arrangement of "Star Wars Theme and Cantina Band" by Meco is the only instrumental single to reach Platinum status by the Recording Industry Association of America (RIAA), having sold over 2 million units
R5YB9 TIL while the title Archduke was mostly designated to a person greater than a regular duke but less then a king, the original archduke was Otto the Great and was made by combining his titles of 'archbishop' and 'duke' to symbolise his dual roles.