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TIL Alan Kay envisioned the concept of the DynaBook in 1968. Originally called "KiddiComp", he described it as a personal computer for children of all ages and would offer similar functionality as what is now known as a laptop or tablet.

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4XM1J TIL Human zoos, also called ethnological expositions, were 19th- and 20th-century public exhibitions of humans, usually in an erroneously labeled "natural" or "primitive" state.
epyD4 TIL Redwood trees have no taproots. Their roots grow only 10 to 13 feet vertically, and then spread horizontally for 60 to 80 feet, intertwining with the roots of other redwoods in a grove for stability.
j68MM TIL that Pandas have been shown "Panda Pornography" and dosed with Viagra to encourage them to breed in captivity.
NX5l8 TIL that stretch marks don't tan.
nWGVG TIL it's humanly impossible to fold a piece of standard notebook paper in half more than 7 times. But if you were able to fold it 26 times, the thickness would near the height of Mount Everest (6,710 meters).