DESCRIPTION
With every day that passes, a new discovery of some kind is made. Sometimes it is a new cure for a disease, sometimes it is a new star, sometimes it is a new element. We have explored the atmosphere of our own world, we have photographed far-distant planets, we have penetrated to the greatest depths of the ocean. Yet we know very little about the sea that covers nearly three-quarters of our planet. Here is a simple approach to a highly complex subject, with clear diagrams and illustrations.