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TIL It took mankind 50 years, 3 months and 26 days to advance from Wright's first manned flight to Gagarin's' first manned space flight. Today we are further in history from Gagarin's historic flight than he was from Wright's flight.

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Jx6V TIL 2 million people formed a 675 km chain between the three Baltic states to demonstrate a desire for independence from the USSR in 1989
loYgA TIL the University of Montreal attempted to conduct a study in 2009 on male pornography consumption but was unable to put together a control group because they were unable to find men who had never watched porn
0wYoM TIL there are sea slugs that incorporates chloroplasts into their bodies, making them the only multicellular animals that can photosynthesize.
KOrkw In 1965, a Japanese company called Yamasa Clock created a personal-fitness pedometer called the Manpo-kei, which means “10,000 steps meter.” The Japanese character for 10,000 looks almost like a person walking or running, which is likely how the gadget-maker landed on the name—and the number. It’s also an easy goal to remember, especially when accompanied by a sketch of a person who’s literally walking. But that benchmark wasn’t based on any scientific evidence. There's no magic number of steps that can ensure your heart health.
ZppyR TIL In paleontology, an "Elvis taxon" is a group of organisms that was thought to have re-emerged from extinction, but in reality has actually merely developed a similar evolution, "in recognition of the many Elvis impersonators who have appeared since the death of The King."