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TIL there are no rainbows on any other known planets, because Earth is the only planet to have liquid water on its surface or in sufficient quantities in the atmosphere to make rain.

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ma0y TIL when kidnapped by pirates, a young Julius Caesar basically took charge of the ship, ordered his captors around & even read them his poetry (while reminding them they’d be crucified afterwards, which the pirates found hilarious.) Once free he raised a navy, captured them, and had them crucified.
d89Ld TIL mobster Al Capone, said the Lindbergh baby kidnapping was "the most outrageous thing I have ever heard of." He offered $10,000 of his own money for information leading to the return of the child.
OobK1 TIL that in 1971, as part of an experiment to study the causes and effects of landslides, Japanese scientists watered down a hill using fire hoses to simulate the effect of a torrential rainstorm. The soil on the hill gave way and the resulting landslide killed 4 scientists and 11 observers.
PYNKn TIL about two faced "Janus" cats, named after Roman god who had two faces; one looking into the past, the other the future. They don't usually survive more than a day, but a 2 faced cat named Frank and Louie defied the odds and lived for 15yrs, even appearing in the Guinness World Records book 2006.
rPZx TIL Hippos sleep underwater and rise to breathe every few minutes without waking.