Public domain photos

The image shows a person holding a ruler in their hand next to a rock, which appears to be a mudskipper. The person's finger is visible at the bottom of the image, indicating that they are about to measure the size of the rock.

The image shows a person holding a ruler in their hand next to a rock, which appears to be a mudskipper. The person's finger is visible at the bottom of the image, indicating that they are about to measure the size of the rock.Open in library