Nature is experimenting all the time though. Damage to DNA is random and stable and mutable parts of the DNA have an equal chance to be impacted. Beningn mutati

Nature is experimenting all the time though. Damage to DNA is random and stable and mutable parts of the DNA have an equal chance to be impacted. Beningn mutations accumulate and non-viable ones don't persist for very long. Also, accidents during cell division can cause parts of the genome to be lost. Sometimes more extreme changes happen during cell division when genomes are duplicated. Retroviruses that manage to reach the germ line can also have a huge impact. In these cases, the new genetic material can take over entirely new functions. Human evolution is pretty slow because of a generation time of 20 to 30 years, but in more short-lived species such as fruit flies much more interesting things can be observed. Some of these indeed remind me of software development.