The Science of Getting Old
As we age, our body enter a biological aging process in which our system naturally deteriorate and we become more vulnerable from everyday wear and tear. At old age, many important physical and mental functions stared to fail. This graphic answer the commonly ask questions about human aging; why do we age, why our hair turns gray, why our skin wrinkles, why we get shorter, why we go blind and why we easily forgot as we age. See also Our Aging Population.
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