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TIL there is 14-thousand-year-old rock art in the middle of the Sahara desert. The paintings show crocodiles, giraffes, and hippos, from a time when the Sahara was lush grassland and forest, and was able to support these animals.

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08av TIL the first American spy satellites literally dropped their film from space in a “film bucket” that was then scooped up in midair by a plane
Yp8Nx TIL Pluto was discovered in 1930. It takes around 248 years to complete one orbit around the sun. Since its discovery it still has not even made one complete orbit.
Z8W54 TIL a bruin bear was found on a ledge of a California bridge. Volunteers strung a net under the bear; officials shot it with a tranquilizer dart, nudged it with a pole onto the net, lowered it to the ground & steered it into the wild. The bridge where the bear was found is called "Rainbow Bridge."
QW5X TIL the co-creator of Tetris brutally murdered his family because he never received any money from the success of Tetris.
564D TIL: The famous Windows “3d pipes screensaver” contains hidden Teapots as pipe joints. It was used as an inside joke & reference to the “Utah Teapot”. A standard reference object throughout the computer graphics industry.