Note that the timescale for seeing results is related to the selection pressure. You can see very fast results (e.g. a single or few generations) if the pressur

Note that the timescale for seeing results is related to the selection pressure. You can see very fast results (e.g. a single or few generations) if the pressure is extraordinary. AFAIK this only happens via guided intervention (see humans selective breeding of crops, dogs, foxes, etc)