The image shows a close-up of a sandy surface. The sand appears to be light brown in color and has a rough texture. On the right side of the image, there is a black and white ruler with a grid-like pattern on it. The ruler is resting on top of the sand, and the ruler is slightly tilted to the left. In the center of the ruler, there are several small footprints or marks scattered across the sand. The footprints appear to be of different sizes and shapes.