› added 9 months ago

71

TIL that Pilot FriXion ink is thermo-sensitive, and leave a notebook or homework near heaters or in a car on a hot day can make the ink invisible. To make the text reappear, you can simply put it in a freezer for a short period of time, the ink should reappear at around -10C/14F

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PARg TIL That as a child Muhammad Ali was refused an autograph by his boxing idol, Sugar Ray Robinson. When Ali became a prizefighter, he vowed never to deny an autograph request, which he honored throughout his career.
9Y7PM TIL, since 1513 the Kings of Denmark names had alternated between Christian and Frederick, until 1972 when Margrethe II became the first female monarch of Denmark, since Margrethe I in 1412
VMNLD TIL laser hair removal is sometimes used after gender reassignment surgery to remove hair growth in the vagina.
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