The image shows two sets of X-ray images hanging on a wall. The left set of images appears to be a grayscale X-ray, while the right set is a color X-ray. Both sets of images depict human skulls, with the color X-ray showing more detail and contrast compared to the grayscale version. The skulls in both sets appear to be of different ages or stages of development. The X-ray images are displayed in a vertical orientation, with the top image being the largest and the bottom image being the smallest.