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TIL Chimpanzees and other apes can be born with a defect similar to Down Syndrome.

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W7epo TIL Brazilian composer Hermeto Pascoal wrote a song for every day of the year (including February 29th), so that everyone would have a song for their birthday.
neL0Y TIL about pan-human love. In past 300k years, we overlapped with 6 known human species. All but us now extinct, though we interbred and carry the DNA of at least two (Denisovans, Neanderthals). Some Neanderthal skeletons carry our DNA too. Denisovans and Neanderthals mixed separately from us also.
LkZAV TIL of the Great bison belt. A tract of grassland that ran from Alaska to the Gulf of Mexico around 9000 BCE, which allowed the bison to outlive other Ice Age animals and let the animal become the staple food of the Plains Paleo-Indians
evG6 TIL that the reason NPR has a “signature sound” for its national broadcasts is because all hosts use a single model of microphone, the Neumann U87
l7byG TIL white phosophorus left over from World War II was dumped in the ocean and occasionally washes up onshore in places like Scotland and Germany.