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TIL that the Schwarzschild Radius is the size an object is compressed in order to make it a black hole. Earth’s Schwarzschild Radius would be compressing it to 8.7 mm, which is about the size of a peanut.

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5ZBP TIL that multiple people have died attempting to cross a seemingly calm, innocent creek called the Bolton Strid. The stream actually hosts multiple underwater cave systems and dangerous currents below the surface that have sucked numerous people to their deaths.
oYjA TIL that Alan Greenspan once tried to have his dissertation banned from New York University. When a copy was obtained by Barron’s, it was found to be “a discussion of soaring housing prices and their effect on consumer spending; it even anticipates a bursting housing bubble.”
r9L1 TIL ‘Sharknado’, a Syfy original movie, received an 89% rating on Rotten Tomatoes.
5YwZk TIL of king penguin, Lala who was injured and nursed back to health in Japan. He didn't leave so the family adopted him and lived in a air-conditioned room. He walked around the neighborhood and got himself fishes from the store. He lived with the family for 10 years before dying of old age in 1996.
KYNMQ TIL Swiss cars need a "CH" sticker when driving abroad, required by the 1968 Vienna Convention on Road Traffic. Swiss plates have no country code, only the Swiss and cantonal coat of arms and the cantonal code.