If rocks are the“fossil”of the Earth, then bones well deserve to be called the“fossil”of human.
Under the microscope, which magnifies the object dozens or hundreds of times, bone tissues appear impressively in various forms. They look sometimes as hard as iron, sometimes as gentle as wind; sometimes as vehement as fire, and sometimes as serene as water; sometimes glamorous and flaunting, and sometimes distant and mysterious as if they are trying to relate the whole mysterious story of the body and life, from void to substance, from simplicity to complexity, standing strong, experiencing ups and downs, withering with the passing years, and vanishing into the air. The bone tissues that have never stopped changing for a single while in life also left the most and the longest tracing marks of itself.