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TIL Of the pareto principle also known as the 80/20 rule. Which states that for many events, roughly 80% of the effects come from 20% of the causes. ex. Microsoft has noted that by fixing the top 20% of the most-reported bugs, 80% of the related errors in a given system would be eliminated.

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oBpj8 TIL Mammoth Ivory trade is almost totally unregulated and undocumented, this is not easily distinguishable from elephant ivory and thus there is tangible risk of illegal international trade in elephant ivory being being deliberately mislabeling as mammoth ivory.
v1jDD TIL the bearded vulture is the only known animal whose diet consists almost entirely (70-90%) of bone. It is capable of swallowing a sheep's vertebrae whole. The bird's stomach acid has been estimated to have a pH of 1, so even large bones are digested within 24 hours.
DZne TIL When Frank Sinatra died, Las Vegas casinos stopped spinning for 1 minute. (#8)
ZBjo TIL The Hudson’s Bay Company, now a Canadian department store, is 347 years old and once controlled 3,000,000 sq. miles of land.
DQwgj TIL that the first person to perform at the Sydney Opera House was Paul Robeson – he sang "Ol' Man River" to the construction workers as they ate lunch.