http://www.sciencedaily.com/releases/2007/03/070328073301.htm - Why Some People Are More Attractive Than Others'
> why are individuals so different?
I had wondered about this too. They found:
Using a computer model to map the spread of genes in a population, Professor Petrie demonstrated that the tendency towards reduction in genetic diversity caused by sexual selection is outweighed by the maintenance in greater genetic diversity generated by mutations affecting DNA repair.
Professor Petrie, of the Evolution and Behaviour Research Group in the School of Biology at Newcastle University, said: 'We started this research ten years ago and our model has now produced a good fit with what we observe in terms of genetic variation, which leads us to believe that our theory is correct.' 'We find that sexual selection can promote genetic diversity despite expectations to the contrary.'
It's fascinating. The objective functions in genetic programming don't usually allow such diverse outcomes. It reminds me somewhat of the idea that search engines need to throw in some random results or otherwise the results will be too specialized.