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Human Biology and Evolution Humans are Alive The earliest human life form can be traced back more than 3.5 billion years ago. Humans are said to be descendants of a single celled ancestor. Although they are different in size and shape all basic functions are alike. The more complex the organization of the cell became the more successful and developed it became. As these single celled organisms developed they became known as pre-humans. We share many …

…foot 6inches and 55 pounds. “Turkana Boy” Turkana boy was found in 1984 at Navio Kotome in North Kenya. When found Turkana boy was 5foot 3inches and 106 pounds. If Turkana boy had lived scientists believed he would have grown to be 6foot 1inches and 150 lbs. Earliest Human Relatives As I previously stated one of the earliest human relatives was “Lucy”. Her scientific name is Australopithecus Afaransis. Lucy and others like Turkana Boy show evidence of walking upright.