While UV rays can cause skin cancer, because skin cancer usually affects people after they have had children, it likely had little effect on the evolution of skin color because evolution favors changes that improve reproductive success.
The only problem was that I couldn't remember where I had heard that. In fact, I wasn't all that sure that I was right. I know that the Roman Empire lasted rougly 500 years but how about the Egyptians, the Chinese, the Ottomons, etc. I thought that it would be interesting to explore different empires and see how long they lasted. In another article, I talk about the definition of civilization..
The pinnacle of ancient Rome's power was from 96 A.D. to 108 A.D. During this period known as the Five Good Emperors, Rome controlled a region of about 2.5 million square miâ¦les from Spain to Syria. The maximum extent of the Roman Empire it was under emperor Traiano/Trajan (117 A.D.). 1 person found this useful.