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TIL human babies are helpless because we walk upright. Walking upright requires a narrow pelvis, in which our large head/brain would get stuck during birth, so babies are born with a smaller head/brain that develops more after birth, compared to other mammals.

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ANJX4 TIL that platypuses sweat milk. This is because it doesn't have teats. Milk appears as sweat on a platypus, but it's an aquatic mammal so it doesn't actually sweat at all.
Zyjp TIL 80% of rapists are raised by single moms and 90% of all homeless and runaway children are from fatherless homes
pWWe TIL that in 1931, after Texas Rangers barricaded a bridge spanning the TX-OK border, Oklahoma Gov. “Alfalfa Bill” Murray appeared at the site armed with a revolver, backed by the Okla. National Guard, to reopen the bridge. The bloodless “Red River Bridge War” even got the attention of Adolf Hitler.
M77xB TIL evidence of the world’s oldest forest, dating back 385 million years, has been discovered in an abandoned quarry in upstate New York, according to a new study published in Current Biology.
P0yJ TIL early in Ella Fitzgerald’s career, she was denied the right to sing at a club on account of her race. One of her biggest fans insisted she be booked, which launched Ella’s career. The fan was Marilyn Monroe.