sunburns

Now, I don't intend to sound racist in saying this, but isn't the existence of blacks and whites proof of evolution via environmental stresses? Given that darker skin has more resistance to sunburn than lighter skin, and that the darker skin genes come from areas of the world where there is very little shade (such as Africa), causing the risk, and severity, of sunburn to greatly increase. alternately, in areas that are dominantly lighter skinned (such as Europe), there is  a lot more all around shade, decreasing the risk of damage from the sun. Therefor, given that those with the darker pigment resist sunburn better and thus would survive such harsher environments much more effectively, it shouldn't be such a problem for us to conclude that evolution DOES work, it IS caused by the environment, and that we shouldn't be surprised by any of this.

http://www.bidmc.org/YourHealth/TherapeuticCenters/SkinCancer.aspx?ChunkID=157004---site for sunburn resistance facts.