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TIL that goldfish are more closely related to humans than to sharks

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9w6Lm TIL Polar Bears often quench their thirst by digesting fat rather than just consuming ice and snow
ZpR8R TIL that sharks, whose oldest known fossils are from ~450 mya, are much older than Polaris, the youngest, largest, and brightest star in the Polaris system being only 70 myo.
ow0R TIL that according to Tolkien, Sam Gamgee is the “chief hero” of the Lord of the Rings. The quest to destroy the Ring only succeeds because of Sam, who repeatedly saves Frodo from disaster, and he is the only character strong enough to surrender the Ring voluntarily and easily.
mx64E TIL Loretta Lynn's Song "Coal Miner's Daughter" is 100% a true story. The song describes her dad working all night in the coal mine and hoeing corn all day. Her father really was "a coal miner and subsistence farmer," and she really was born in Butcher Hollow, KY.
D1L7J TIL that the blanket octopus has the biggest sexual size-dimorphism of any non microscopic organism. Females can be 6 feet long, while males are only 2.4 cms long.