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TIL rats like to be tickled. However their vocalizations in response that resemble laughter fall in a range between 20-100khz which is outside the range of human hearing.

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P1gxe TIL of Snap-dragon, a parlour game from the 16th century. In a dark room, brandy was heated and placed in a wide shallow bowl; raisins were placed in the brandy which was then set alight. The object was to snatch the raisins and extinguish them in your mouth. Kids often burned their hands & mouths.
Z8mXY Today I Learned that you can’t find broccoli in the wild since it was created by humans by breeding it from wild cabbage.
kLEB TIL that only two of the 185 countries in the International Labour Organization do not have laws mandating parental leave- the United States, and Papua New Guinea.
69o6Y TIL Van Gogh gave his severed ear not to his favorite prostitute, as legend goes, but to an 18 year old maid at the brothel he frequented. Her name was Gabrielle Berlatier. Too young to work as a prostitute, she took a cleaning job to pay medical debt from receiving the newly invented rabies shot.
OoxEL TIL "All animals, including vertebrates (mammals, birds, reptiles, and fish) and invertebrates (sea urchins, leeches, mussels, nematodes, and others) have been found to have endocannabinoid systems."