Radio spontaneously invented by genetic algorithm

An experiment in self-evolving circuits spontaneously invented the radio:

To pick up a radio signal you need other elements such as an antenna. After exhaustive testing they found that a long track in the circuit board had functioned as the antenna. But how the circuit "figured out" that this would work is not known.

"There's probably one sudden key mutation that enabled radio frequencies to be picked up," says Bird.

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(Thanks, Ernie!)