I'm going to talk about evolution again today... or rather more specifically, how the evolution of certain species of lepidoptera can be used as indicators of environmental quality. Now I'm sure - and I make this reference because it is considered a textbook example of what I'm talking about here - of the peppered moth (Biston Betularia) and how it has evolved since, to cope with living through urbanization, a process that has changed drastically the habitat of which the moth is accustomed to surviving in.
|Peppered Moth (Biston Betularia) typica morph.|
|Peppered Moth (Biston Betularia) carbonaria morph|
|Tawny Costers (Acraea Terpsicore) *left* taken from industrial area, *left* taken from hutan.|
As an afterthought, I wonder if the diversity in human skin colors can perhaps be attributed to something akin to the situation of the moth... though not necessarily pollution, but the drive to survive. After all, if we were all descendant from Africa - assuming we possessed much darker skin tones in our primitive form - then would it not be plausible to assume that the 'white' skinned variety of human would be seen to be something more novel and/or desirable among the otherwise 'common' dark-skinned majority? But that thought leads to near to the path of racial essentialism (something we should avoid at most costs!) and that is something I shall not delve on for too long.