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TIL that a single fire hydrant in San Francisco survived a massive earthquake in 1906 and aided fire fighters in saving the Mission district. In memory of the event, the hydrant was painted gold.

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MKJa TIL before the horse was introduced in North America, the Navajo word “łį́į́ʼ” (literally meaning “pet”) was used to refer to dogs. But when horses became the new favoured pet, łį́į́ʼ became the word for “horse”. And dogs are now refered to as “łééchąąʼí”, “shit pets”.
6ElJw TIL Around 40,000 Irish fought for the Confederate Army in the US Civil War
7mY7 TIL that Mark Zuckerberg unsuccessfully tried to sell facebook for $75 million in 2005.
xVV4D TIL before Sony stopped supporting OtherOS, the PS3 was such an effective Linux system, institutions like University of Massachusetts Dartmouth, North Carolina State University & the U.S Armed Forces used PS3 clusters making an affordable high-performance computing system to create a supercomputer.
v14yj TIL that due to poaching, female African elephants are evolving tuskless; about 1/3 of females in a Mozambique Nat'l Park were born tuskless with males evolving smaller tusks. They use tusks to compete for mating, dig for water and topple trees for food which in turn creates habitats and water holes