The fetal bones have been stained with a dye which only stains the calcified regions, hence the bones! It was preserved many years ago, and over the years, the skin unfortunately turned a lovely shade of cement gray. It was decided to restore the specimen and give this nugget a new look via diaphonization, also referred to as clearing and staining. It is a process by which chemicals are employed to render the skin and soft tissue of a specimen translucent, while dyes/stains are used to color the bones or cartilage to highlight them. This method is used in many animal species for preservation and research. Fetal organisms, in particular, prove useful in the laboratory. With a crystal clear view of the subject’s internal features, scientists can observe the impact of environmental contaminants on unborn animals, such as extra limbs and other deformities, offering crucial insight into how these chemical pollutants affect normal growth and development.