When you are on the beach, you are stepping on ancient mountains, skeletons of marine animals, even tiny diamonds.
As children we play on it and as adults we relax on it. We complain when it gets in our food and we praise when it’s moulded into castles.
If we looked at it, we would discover an account of a geological past and a history of marine life that goes back thousands and in some cases millions of years.
The sand covers not just seashores, but also ocean beds, deserts and mountains. It is one of the most common substances on earth. And it is a major element that people use.