Most of the examples actually come from the unexpected behaviour of evolutionary algorithms. My favourite example of such (and it doesn't look like it made it

Most of the examples actually come from the unexpected behaviour of evolutionary algorithms. My favourite example of such (and it doesn't look like it made it into the paper the article is based on) was an attempt to create a random number generator via a genetic algorithm that controlled the development of an electronic circuit. The unexpected way the algorithm solved the problem was to produce a radio. Edit: I may have been thinking of the result reported this paper. http://people.duke.edu/~ng46/topics/evolved-radio.pdf http://people.duke.edu/~ng46/topics/evolved-radio.pdf . If so, the goal was to build an oscillator rather than a random number generator.