No I didn't say that the sons of Adam and Eve would like their brothers.
They would be clones.
You give a lousy example about skin color. I get brown only after 2 days in the Marocan sun. Jee, don't I mutate fast.....?
The third generation of Arabians has seen significantly less sun as well.
It doesn't go that fast, trust me. We humans have a back, highly unsuitable for walking on 2 legs. We have been walking on 2 legs for thousands of years.
You say the most adaptable species in this world is us, the humans. That is not true. I am not a hundred percent sure which is the most adaptable, but my guess would be viruses.
You know why? Their next generations follow eachother up so fast and the genetic mixture is so messy, that in less time there will be a new variant that is better equipped for other environment. Read a bit on that infectious disease among birds in Asia and the fear of that virus mutating.
Btw, we don't survive everywhere at all. And if we do it is usually not because of our genetic buildup or the ability to evolve, but thanks to our brains.