Tierra evolved— without extensive setup in the representational structure— viruses and other kinds of interesting parasites and countermeasures, including sexua

Tierra evolved— without extensive setup in the representational structure— viruses and other kinds of interesting parasites and countermeasures, including sexual reproduction: http://infidels.org/library/modern/meta/getalife/coretierra.html http://infidels.org/library/modern/meta/getalife/coretierra.... (this isn't to say that evolutionary approaches are all that useful, they're usually outclassed by other optimization approaches, and where they work it's either in trivial cases or with mind-boggling amounts of computation)