abstract biological biomedical bone cancellous contrast dic differential interference medical microscope microscopy spongy sub-chondral sveres trabecular vertebra vertebrae animal eyes animals mammals ape apes apes eyes chimpanzee chimpanzee eyes eyes gorillas looking monkey monkey face orangutans zoo ancient black Greece Greek handicraft helmet history iron metal odisea odyssey protection soldier texture troya war warrior ball child children city limit limits pedestrian play resident residental road roadsign sign street town urban village zone