WHY Humans Look Different

The Tower of Babel, were a united human race speaking a single language, agreed to build a great city with a tower to reach heaven. God, observed their pride and ambition to which He confused their languages, causing them to be unable to understand each other and forcing them to scatter across the earth.

Genesis 11

They became genetically isolated, meaning that they married and had offspring primarily within their particular group. As years passed, each group developed its own culture and ways of doing things. Genetically isolated, certain physical traits became more prominent in each group.