WORLD HISTORY

Detailed explanation-1: -Humans first evolved in Africa, and much of human evolution occurred on that continent. The fossils of early humans who lived between 6 and 2 million years ago come entirely from Africa. Most scientists currently recognize some 15 to 20 different species of early humans.

Detailed explanation-2: -Our species, Homo sapiens, has now spread to all parts of the world but it’s generally believed that we originated in Africa by about 200, 000 years ago.

Detailed explanation-3: -The idea that humans evolved in Africa can be traced to Charles Darwin. In his 1871 book The Descent of Man, Darwin speculated that it was “probable” that Africa was the cradle of humans because our two closest living relatives-chimpanzees and gorillas-live there.

Detailed explanation-4: -The first hominin species, a line that eventually leads to humans, may have emerged in Europe 7.2 million years ago and not Africa-the most widely accepted starting point for our ancestors.

Detailed explanation-5: -The earliest humans developed out of australopithecine ancestors about 3 million years ago, most likely in Eastern Africa, most likely in the area of the Kenyan Rift Valley, where the oldest known stone tools were found.