Of all the mammals currently living on this planet, the human race comes in a variety of diverse forms: a myriad of differing faces, skin colors, body shapes, eye colors, hair colors, heights and weight variations, but all undeniably "human."

All of these identifying features have, until very recently, been a product of evolution and the kaleidoscope of genetic diversity.
Historically, many varieties of hominid have existed, being defined by their most predominant capabilities and gradually evolving into more capable and advanced species: Homo habilis who had basic abilities; Homo erectus who could walk upright and homo sapiens who could think.
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