This is just my opinion. But I stick with it until someone convinces me otherwise.
Everyone on the planet is a variation of the same color - a type of brown. That's because we all have melanin in our skin, just varying amounts. We are all of the same species - different ethnicities can have babies together and their babies can have babies.
After the Tower of Babel, people groups became remote and having little to no contact at first with one another. Those that migrated towards the equator had to produce more melanin for protection for their skin and those that migrated away from the equator needed less.
It doesn't take millions of years for family facial features, skin features, or health features to become dominant in a group OR to recede.
I watched a program on television about the uniting of some first cousins who had never met. Here's the thing.
- The grandparents, in the 1920's, were both bi-racial. Pictures of them show a caramel colored couple. Each had one white parent and one black parent.
- They had several children. All the same soft caramel color.
- Unfortunately, the mother and father contracted cholera and died.
- No one would take all of the children, so some of the white relatives took a few and some of the black relatives took a few.
- The white relatives raised the children they took to be "white". Dating/marrying white people. The black relatives raised the children they took to be "black". Dating/marrying black people.
- The result? The grandchildren - being first cousins of one another - superficially, showed NO TRACE of being bi-racial. They were as white as white can be and as black as black can be. In just two generations.
- They knew of each other and had been in contact by mail and phone. They met on the television show. If you saw them and someone were to say to you - those people are first cousins - you would say, "You need glasses!"
People who believe in evolution believe that it takes millions and billions of years for changes to occur in humans, animals, the planet, and the universe.
It just isn't true. And that's observable and provable.