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TIL of a Kugelblitz a theoretical astrophysical object predicted by general relativity. It is a concentration of heat, light or radiation so intense that its energy forms an event horizon and becomes self-trapped. The concentration of energy can warp spacetime so much that it creates a black hole

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wL9jY TIL that the 1982 hit "Gloria" by Laura Branigan was originally an Italian hit of the same name, written and performed in 1979 by Umberto Tozzi.
GY5YE TIL of an organization called the National Lawyers Guild. The NLG can deploy a team of Legal Observers to a protest or demonstration. They act as a source of legal advice for protesters, and “may serve as a deterrent to unconstitutional behavior by law enforcement.” Look for their green hats!
KLv6 TIL: Members of the band “Good Charlotte” protested against KFC’s treatment of chickens. Then in 2012 and 2013 appeared in a number of KFC commercials in Australia and even tried to set a world record for eating KFC on “Australia’s Got Talent”
5VM4D TIL a classmate of Anne Frank, Theo Coster (Morris Simon, 1928-2019), founded with his wife Ora (1931-2021) a game design company which invented popular games such as Guess Who?, Zingo! and the breast-inspired Pop-It fidget toy. Their headstones were made to resemble the Guess Who? flip-up frames.
p0KZ TIL that Psilocybin, the chemical compound found in psychedelic mushrooms, grows new brain cells and could be used as a treatment for PTSD and depression.