Other parallel inventions which seeming arose out of the blue, or even accidentally, but still got invented by several people at the same time: Radar, jet engines, computers, rocketry, light bulbs, just off the top of my head.
There's that old saying: "An idea whose time has come." which tends to explain things.
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[ 88.8 ms ] story [ 968 ms ] threadThere's that old saying: "An idea whose time has come." which tends to explain things.