Skeletal structure of a bird. (Photo by Andreas Feininger/Time & Life Pictures/Getty Images)
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Skeletal structures of man and horse. (Photo by Andreas Feininger/Time & Life Pictures/Getty Images)
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Skeletal structure of a jumping mouse (Photo by Andreas Feininger/Time & Life Pictures/Getty Images)
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Skeletal structure of a mole, shovel shaped hands and wedge shaped skull, giving the mole perfect tunneling tools
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