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TIL maternal prepregnancy obesity was associated with an increased risk of Severe Maternal Morbidity and Mortality through 1 year post partum; it appeared to be mediated by hypertensive disorders

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d84xE TIL The 1964 Rudolf the Red Nosed Reindeer TV special is in a grey area of copyright due to the fact that the studio mistakenly spelled out the copyright date as 1164 in roman numerals and haven't corrected it since
1aKZ4 TIL that a photosensitive drum, charged by a corona wire, inside a photocopier machine, carries an electrical shadow of the letters to be copied towards the toner, where the toner particles stick to the shadow and then transfered to white blank paper.
v1Rnx TIL that at the conclusion of WW1, Kaiser Wilhelm II mistakenly believed that he ruled the German Empire in a personal union with Prussia, and so he could abdicate the former but still remain king of the latter. This was not the case, and he was forced to abdicate both.
BVDk TIL in 2012, a petition was created urging the U.S. government to create a Death Star, which gained more than 25,000 signatures, enough to qualify for an official response.
WZ14 TIL in 1985 an F-15 fighter jet successfully shot down a satellite with a missile; by 1998, there were still 8 trackable pieces in orbit