› added 4 years ago

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TIL of half-life of knowledge is the amount of time that has to elapse before half of the knowledge or facts in a particular area is superseded or shown to be untrue. An engineering degree went from having a half life of 35 years in ca. 1930 to about 10 years in 1960.

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a8n6N TIL English football (soccer) team Derby County's stadium from 1889 to 2003 was called the "Baseball Ground". It was originally built for baseball, which had a brief vogue in England in the 1890s, but the last baseball game played there was in 1898.
x6kX5 TIL: Failed supernovae are thought to create stellar black holes by the collapsing of a red supergiant star in the early stages of a supernova. When the star can no longer support itself, the core collapses completely, forming a stellar-mass black hole, and consuming the nascent supernova.
v1nxD TIL that axoltols can regrow limbs, tails, hearts, eyes, parts of the brain, and even the central nervous system.
OoRX4 TIL that a 1965 test subject survived a leaky suit in a vacuum chamber but felt water on his tongue begin to boil.
MP8K TIL incubators for premature infants were initially only available at freak shows. The inventor had been turned down by hospitals, so he funded his work by putting premies on display, and didn’t charge the parents for the care.