CHARLES DARWIN’S PREDICTION 
       The Descent of Man
        “In each great region of the world the living 
        mammals are closely related to the extinct 
        species of the same region. It is therefore 
        probable that Africa was formerly inhabited by 
        extinct apes closely allied to the gorilla and 
        chimpanzee; and as these two species are 
        now man's nearest allies, it is somewhat more 
        probable that our early progenitors lived on 
        the African continent than elsewhere.”
    BACKGROUND INFORMATION
       Early species of Homo, Homo habilis, 
        evolved in Africa around 2 million years 
        ago
       Later, Homo erectus evolved along with 
        other hominids and migrated out of 
        Africa
       Homo erectus evolved to Homo sapiens 
        around 100,000 to 200,000 years ago
    WHAT IS THE THEORY?
       A distinct group of sub-Saharan Homo 
        sapiens inhabited Africa for about 
        150,000 years before migrating 
        throughout other continents
       Homo sapiens completely replaced all 
        earlier human populations 
        (Neanderthals and Homo erectus)
       No interbreeding occurred