Human memory is unique. She can remember thousands of poems and works, mathematical formulas and laws of physics. But, unfortunately, over time, it is difficult to remember the faces of your favorite people. Or show your child how they used to live and where they were, now elderly parents. And then you reach for the old album, which contains photos of a young and beautiful grandmother, who stands in a light summer dress at the fountain. Or a young grandfather, in the uniform of a sailor, standing on the deck of a ship. The photos are neatly pasted on the pages, but they have already begun to crumble. The cracks and scuff marks (possibly a torn edge). In older photos, cracks and other defects may be on the face.