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TIL of "sea gypsies" who roam the sea most of their lives. Moken children have been demonstrated to be able to see better underwater while members of another group have a number of genetic adaptations for a lifestyle involving extensive freediving.

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v1MOx TIL Capuchin monkeys at Brazil’s Serra da Capivara National Park, are 3,000 years into their own 'Stone Age'
WkKpY TIL quokkas don’t throw their babies at predators like the rumors said. Instead, the mothers will make their kids lay writhing and hissing on the ground to attract predators (while they escape)
byyN TIL that IKEA is a non-profit organization dedicated to “furthering the advancement of interior design.” This lets them pay a fraction of taxes they otherwise would. The owners make money by licensing the IKEA trademark to the non-profit side.
OG6g1 TIL a Christian mob killed the female universal genius Hypatia in 415 A.D. The mob stripped Hypatia naked, cut out her eyeballs, tore her body to pieces and dragged her limbs through the city. Hypatia was depicted as a teacher of mathematics, philosophy and astronomy.
yM1e TIL that a succulent native to Morocco produces Resiniferatoxin, a compound so spicy that it is approximately 1,000 times stronger than pure capsacin on the Scoville scale. It can cause severe chemical burns and is being researched towards a possible new class of analgesics