› added 2 years ago

189

TIL about the Hiller Flying Platform, a 1950s hoverboard.

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VMvem 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of knowledge is the amount of time that has to elapse before half of the knowledge or facts in a particular area is superseded or shown to be untrue.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.
7rxEX TIL that Kay Thompson, author of the Eloise children's books, was also a popular singer who had a young Andy Williams as one of her backups, and became "romantically involved" with him on tour, when he was 19 and she was 38.
XEA4k TIL that the Ancient Greeks invented the spiked dog collar to protect their canine buddies from wolf attacks
J5Bv TIL It is legal to open carry a sword in California, but only if it’s sheathed.
OGEKR Today I learned that the beautiful fine sand in the Maldives and other tropical locations is basically parrot fish poop