Mitochondrial Eve is thought to be the common ancestor of all humans. It is believed that since the mitochondria DNA is passed from only the mother, then all humans have the same common mitochondrial DNA. So even though over time humans have evolved to look different, there is a part of us that remains the same. Just like with any evolution, we have developed traits and adaptations that become useful for the habitat the population is located. These adaptations can range from height, size, skin color, and other physical forms. This has been caused by humans relocating from the original location of the Mitochondrial Eve in the Great Rift Valley in Africa. As the human race spread across the world, with different habitats, the diversity of the physical appearance has become more dramatic. It is thought though that one day in the future the human race will become one race again with the same physical traits, and once again look like our common ancestor. It is thought that we will all have the same height with tan skin, dark hair, dark eyes. Below, there are pictures of Mitochondrial Eve, examples of the diversity today, and some tribes of that still remain in Africa.