At 7/30/12 07:23 AM, Halberd wrote:
Does the decrease of blonde hair count as evolution?
also some things will change I think, like what Ragnarokia said about the sense of smell in humans
Yes. There are so many misconceptions in this thread about what evolution actually is. It's a little painful to read, and it is no wonder so many people attack it as they clearly don't have a proper understanding.
On a fundamental level evolution is the change in frequency of alleles within a population. That means that if you have blue eyes (coded by a blue eye allele) and your neighbour has brown eyes, and you shoot your neighbour, then evolution has occurred as a greater percentage of your population now have blue eyes.
This is not to be confused with survival of the fittest, which a means by which beneficial genes can reach 'fixation' (a state where they are present in an entire population). Most alleles do not reach fixation and simply become more or less common, as most genetic variation has no significant impact on survival. Blonde hair is an excellent example.
So evolution is occurring constantly with every birth and death in our population (as well as any mutations that may occur). The frequency of genes is constantly altering, and should it prove to be beneficial to survival will become more common until it reaches fixation.