I know that microevolution has been experemnted on Lizards
it is clear that creatures evolve with new environment
for example if you take creatures from warm environment to a cold one there comes the mircoevolution where it help this creatures evolve genetically to adapt with the new environment.
Has any mircoevolution changes (genetically) happened to any of the europian people who moved to south africa centries ago? or to any of the african american who moved from africa to north america?