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Its a great essay Exellent job Human Evolution the biological and cultural development of the species Homo sapiens or human beings A large number of fossil bones and teeth have been found at various places throughout Africa Europe and Asia Tools of stone bone and wood as well as fire hearths campsites and burials also have been discovered and excavated As a result of these discoveries a picture of human evolution during the past 4 to 5 million years has emerged Human Physical Traits Humans are classified in the mammalian order Primates within this order humans along with our extinct close ancestors and our nearest living relatives the African apes are sometimes placed together in the family Hominidae because of genetic similarities although classification systems more commonly still place great apes in a separate family Pongidae If the single grouping Hominidae is used the separate human line in the hominid family is distinguished by being placed in a subfamily Homininae whose members are then called hominines--the practice that is followed in this article An examination of the fossil record of the hominines reveals several biological and behavioral trends characteristic of the hominine subfamily Bipedalism Two-legged walking or bipedalism seems to be one of the earliest of the major hominine characteristics to have evolved This form of locomotion led to a number of skeletal modifications in the lower spinal column pelvis and legs Because these changes can be documented in fossil bone bipedalism usually is seen as the defining trait of the subfamily Homininae Brain Size and Body Size Much of the human ability to make and use tools and other objects stems from the large size and complexity of the human brain Most modern humans have a braincase volume of between 1300 and 1500 cc between 793 and 915 cu in In the course of human evolution the size of the brain has more than tripled The increase in brain size may
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