As time has passed by, the size of the cranium changed. With that being said, the size of the cranium changed in result of better nutrition. On another note, the width of the pelvis changed as well. In that case, the width of the pelvis changed in result of its bipedality. Therefore, bipedality determines whether or not a genus homo can walk, run, as well as their ability to create tools in order to survive.
Ardipithecus ramidus
Ardipithecus ramidus also known as "Ardi" was believed to be an early human-like female Anthropoid. She lived among the woodland environments of Eastern Africa in Middle Awash and Gona, Ethiopia. She lived about 4.4 million years ago. In 1994, Ardipithecus ramidus was first reported. Ardi's foot bones appeared to have a divergent large toe with a rigid foot. Her pelvis showed she had tree climbing and bipedal abilities.
Australopithecus afarensis
Australopithecus afarensis was one of the longest-lived and well known early human species. Australopithecus afarensis lived among the Eastern Africa in Ethiopia, Kenya, Tanzania. …show more content…
These features indicated a life lived on the ground, loss of tree-climbing ability, and the ability to walk and possibly run long distances. Homo erectus lived in Northern, Eastern, and Southern Africa, Western Asia in Dmanisi, Republic of Georgia, and East Asia in China and Indonesia. Homo erectus lived between about 1.89 million and 143,000 years ago. Homo erectus is considered to be variable species, existed within two continents, and possibly the longest lived early human species about nine times as long as our own