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TIL that the invention of bicycles was fundamental to the early women's liberation movement. Bicycles promised freedom to women long accustomed to relying on men for transportation. It was also the main reason corsets and long skirts fell out of fashion in the early 20th century.

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eBrk TIL to never drive a car with a full bladder. In the event of a crash, the force of impact and the seat belt can cause your bladder to rupture.
9wOXp TIL Richard Feynman taught a two-year introductory physics course at Caltech from 1961 to 1963 and his original students had no textbook—their only written materials were created "on the fly". These notes were later published and used as the introductory physics textbook for nearly two decades
4VJ6 TIL: Hollywood has had a population of feral chickens living under a freeway since the 70s. Nobody knows how they got there and all efforts to remove them have failed.
JYnpV TIL bumblebees have parasitic "doppelgangers" called cuckoo bumblebees that resemble a specific race enough to be able to sneak into their nest, kill the queen, and trick all the workers into feeding their offspring and ultimately taking over the whole nest before moving onto their next target.
j6y8n TIL that in 550 AD, the Byzantine Emperor sent two monks to China to smuggle silk worms out of there to avoid Persian control over the Silk Road. The monks hid the worms in their walking sticks, and the silk industry they started lasted for 650 years.