Have you ever been "people watching" in a shopping mall and noticed how different people look? So many shapes, colors, and sizes! In family photos that include my adopted daughter from China, it's easy to see some of those differences. They aren't major but nonetheless visible. My daughter will tell you that my eyes are rounder than hers and my skin is lighter brown. If all people descended from Adam and Eve as the Bible makes clear (Genesis 3:20; 1 Corinthians 15:45), why do we look so different?
The Bible gives us the answers. Although Adam and Eve are often shown to be fair-skinned and blond, this was unlikely. To derive all the different skin shades from one couple, Adam and Eve likely were middle-brown in color. If Adam and Eve had a mixture of "light color" genes and "dark color" genes, then their descendants could have a wide range of skin color from very light to very dark, with most people somewhere between (as seen in the world today). Adam and Eve likely possessed genetic variation for eye shape and other distinguishing characteristics as well.
[Read the rest of the article at Answers in Genesis.]