In the CACM: Sex as an algorithm. Fascinating piece. Not really technical, but a conceptually dense description. Reminds me of some of our own experiments with genetic algorithms to solve complex corporate problems. More in the tag below. These were not really successful, but why?
Probably because we were not successful in creating the right representation of the problem to work with. Never obvious. Even less so for this kind of solution method. Also such genetically found algorithms are by their nature 'black boxes' whose operation cannot be directly explained. Worth the scan or read for broad insight into the idea of genetically finding useful solutions.