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TIL in 1893, large calaverite deposits were found in Kalgoorlie Australia, but was believed to be akin to fool's gold. It was used for town construction. In 1896 it was realized that calaverite contained actual gold, so nearly all structures created in the prior 3 years was demolished for its gold.

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B7GW TIL During truce talks between North and South Korea, both parties would try to bring a bigger national flag than the other to each meeting. This went on until a special meeting was called to address the size of the flags, as they could no longer fit in the room.
rR6Ay TIL that in 1990, the U.S Secret Service once raided the makers of a tabletop RPG game system, believing that one of their manuals (GURPS Cyberpunk) would help people commit computer crimes. The lawsuit resulting from it helped form the Electronic Frontier Foundation.
paGe TIL that humans are more closely related to tuna than tuna are to sharks. The last common ancestor of humans and tuna (and other ray-finned fish) lived 420 million years ago as opposed to 422 million years for tuna and cartilaginous fish like sharks.
NxBE TIL People with psychopathic tendencies have an impaired sense of smell, which points to inefficient processing in the front part of the brain. Those scoring highly on psychopathic traits were more likely to actively struggle to both identify smells & discern the difference between smells.
QNNld TIL that TVs used to end broadcasting and go static at midnight