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201

TIL There were only 3 billion humans in 1960

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R7rXj TIL That IQ can decrease by an average of 13% when people are more stressed
1a1g4 TIL it's called Firmware because it exists on the boundary between Hardware and Software
grZyb TIL that the world's oldest known message in a bottle was discovered on an Australian beach, having been thrown into the ocean over 132 years ago by a German ship's crew as part of a scientific experiment.
Xkr TIL: There is a disorder, Williams Syndrome, where sufferers will befriend anyone.
p8ra8 TIL of the Fresnel lens, a specially crafted type of lens commonly used in lighthouses. Its design allows for a large aperture and short focal length without requiring the lens to be massive and heavy like a traditional convex lens. It also looks like a work of art.