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TIL that in 2006, DNA tests on saliva on the backs of stamps of letters supposedly sent to police by Jack the Ripper was that of a female.

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6EXrQ TIL that the fur fringe or ruff around the outside edge of a parka hood is not just decorative, but functional. It creates a boundary layer of still air around the face, greatly reducing heat transfer versus a non-ruffed hood. This has been proven in wind tunnel tests.
1axl7 TIL that Joachim von Ribbentrop would summon tailors from British firms, make them wait for hours, and then send them away with instructions to return the next day, only to repeat the process. This damaged his reputation with British high society.
epMRE TIL that as of 2022, Mississippi, with a population of approximately 2.94 million, has the highest incarceration rate among U.S. states, with about 0.86% of its residents incarcerated. In contrast, Massachusetts, with a population of around 6.98 million, has the lowest rate, with about about 0.12%.
6E9VZ TIL the Lyrebird can mimic the sounds of other animals as well as unnatural sounds, like chainsaws.
9V0X TIL Richard II (1393) passed an act in the UK for all pubs to have a sign outside the establishment. “Whosoever shall brew ale in the town with intention of selling it must hang out a sign, otherwise he shall forfeit his ale.”