including the Serengeti ecosystem in Tanzania and Kenya. Distinctive Afromontane forests, grasslands, and shrublands are found in the high mountains and mountain ranges of eastern Africa, from the Ethiopian Highlands to South Africa. South of the equatorial forests, the Western and Southern Congolian forest–savanna mosaic are transition zones between the tropical forests and the miombo woodland belt that spans the continent from Angola to Mozambique and Tanzania. The Namib and Kalahari Deserts lie in Southern Africa, and are surrounded by semi-deserts including the Karoo region of South Africa. The Bushveld grasslands lie to the east of the deserts. The Cape Floristic Region is at Africa's southern tip, and is home to diverse subtropical and temperate forests, woodlands, grasslands, and shrublands. History Prehistory According to paleontology, early hominid skull anatomy was similar to that of their close cousins, the great African forest apes, gorilla and chimpanzee. However, they had adopted a bipedal locomotion and freed hands, giving them a crucial advantage enabling them to live in both forested areas and on the open savanna at a time when Africa was drying up, with savanna encroaching on forested areas. This occurred 10 million to 5 million years ago. By 3 million years ago several australopithecine hominid species had developed throughout Southern, East, and Central Africa. They were tool users rather than tool manufacturers. The next major evolutionary step occurred around 2.3 million BCE, when primitive stone tools were used to scavenge the carcasses of animals killed by other predators, both for their meat and their marrow. In hunting, H. habilis was most likely not capable of competing with large predators and was more prey than hunter, although H. habilis likely did steal eggs from nests and may have been able to catch small game and weakened larger prey such as cubs and older animals. The tools were classed as Oldowan. Roughly 1.8 million years ago, Homo ergaster first appeared in the fossil record in Africa. From Homo ergaster, Homo erectus (upright man) evolved 1.5 million years ago. Some of the earlier representatives of this species were small-brained and used primitive stone tools, much like H. habilis. The brain later grew in size, and H. erectus eventually developed a more complex stone tool technology called the Acheulean. Potentially the first hominid to engage in hunting, H. erectus mastered the art of making fire. They were the first hominids to leave Africa, going on