Mitochondrial dna comes through maternal line. If we didn’t have mutations in DNA, then all of our mitochondrial dna would be identical to that eve. As populations were isolated, we were exposed to different environmental conditions like food, water, climate and we mutated. Pigment changes, propensities to accumulating fat. These are some examples:

Kristi Yamaguchi, a famous ice skater, has very a very typical look of someone with an Asian background-mid colored skin, dark hair and eyes, and a thin eye shape. 

This is the president of the Columbian soccer federation. I watched him lose a game to Ecuador this summer. He has a very typical South American look about him with darker skin and hair. 

These are Mongolian sports players. They have a fuller body shape to provide for colder winters as well as the mid colored skin and more Asian looking face structure. 

Ocmulgee Lab

Although the Ocmulgee National Monument holds a great cultural value today, it also boasts a rich history. 
In the Early Mississippian period, people living in the Macon Plateau used agriculture to support themselves. They grew mainly vegetables that grew well due to the location. This period lasted from around 900 to 1150 AD.

This culture ended up declining around 1150-1350 in the Early Mississippian Period giving way to the Lamar and Stubbs villages, which mesh the Woodland and Mississippian cultures. Later in the Late Mississippian Period, the Lamar culture did better for themselves. This was around 1350 to 1650. 

Around 1540, the Europeans began their explorations of the area.