Quick links: # A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
    Walking with Cavemen Poster
    The story of human evolution is told through the stories of representative members of the various species leading up to modern homo sapiens. It is ongoing climate changes that force human ancestors to develop, one by one, the unique characteristics of the modern humans. Though earlier species were superbly successful in their environments they were unsustainable when the environment changes.