In an age when children take the most startling technological phenomena for granted, it is often difficult to inspire them with a sense of wonder. Norman Bate is aware of this problem and deals with it in extremely interesting terms. Contrasting the needs and powers of the greatest creatures of the sea with those of the self-sufficient atomic submarine, he proves the amazing capacity of that invention. As he traces the de-development of the sub from the earliest inventions of Alexander the Great, the gap between the prowess of man and beast increasingly widens. Not a scientific treatise, this covers a few illuminating points for the small child aware of the world around him.