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99percentinvisible.org
9YGpm
TIL the first proto-bicycle was invented because a huge volcanic eruption sent ash around the world, changed the climate, led to famine and disease, and ultimately resulted in the slaughtering of horses for food -- a new mode of transportation was needed to fill the void.
6Eapw
TIL in the 1950s, a researcher was designing army airplane seats for an 'average' pilot based on measurements from 1000s of airmen, only to discover this theoretical 'average' he'd derived wouldn't fit any of them. This realization led to adjustable seats, foot pedals, helmet straps and flight suits
MeWEA
TIL buildings in Hong Kong have huge square gaps (AKA "Dragon Gates") carved out of them in order to let these mythical flying creatures pass freely through structures as they migrate back and forth between the mountains and the ocean