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312

TIL 46 BCE is the longest year in history, with 445 days.

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XEDMQ TIL the Hyena is NOT a canine species. Instead it's part of the feliform suborder and thus closer to a cat-like species.
8daa TIL that the Central Intelligence Agency has a memorial wall at headquarters for employees who are killed while working for the US spy agency. Each year the CIA adds stars for deaths; some with names, some without. There are 125 stars as of 2017, eight more than in 2016 and 46 more than in 2002.
rNVoy TIL in the 1960s, Cap'n Crunch cereal boxes came with whistles which coincidentally had the specific frequency (2600 hertz) required to exploit a vulnerability of in-band signaling enabling a phone to make free calls by entering an 'operator mode'.
j6n5j TIL The Smoot–Hawley Act of '30 was an attempt to protect the US from foreign competition by imposing high tariffs. The consensus view among economists and historians is that the passage of the Act had, in fact, achieved an opposite effect to what was intended. It exacerbated the Great Depression
VMwRp TIL Researchers at IBM made the worlds smallest stop-motion movie (45x25 nanometers) by rearranging individual atoms to create images.