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TIL slime molds are problem solvers, scooting around on pseudopods before ballooning to release their spores. They can find the shortest path through a maze, and they inspired a slime-mold algorithm that researchers used to map filaments of dark matter connecting galaxies in the universe.

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M7bQV TIL that in 2023 a final rule was finally published by the Fish and Wildlife Service declaring the iconic Ivory Billed Woodpecker was extinct. The rule included 21 species, including 10 birds, 8 mussels, 2 fish, and a flying fox. The rule removes protection under the Endangered Species Act.
gM97W TIL that an air traffic controller Peter Nielsen, who was involved in a mid-air collision resulting in 71 deaths, was tracked down and killed by Vitaly Kaloyev whose wife and children died in the crash and that Vitaly was praised as a hero when he was released and returned home
mGKP TIL there are more US nuns over the age of 90 than under 60
VMY4k TIL that the opening ceremony of the Sydney Harbour Bridge was interrupted by a man on horseback, who slashed the ribbon with his sword, declaring that he was opening the bridge in the name of the people of New South Wales.
6EeQZ TIL it is illegal to own only one guinea pig in Switzerland. Not having another of their own to interact makes guinea pigs victims of animal cruelty as per the Swiss government. There are various pet ownership laws on other animals too, including cats, fishes, and parrots.