A Useful Skeleton

Many centuries ago, even prior to the time of Christ, in the region of the eastern Mediterranean Sea, many men were busily engaged in a profitable occupation. Both Homer and Plato refer to this business in their writings. Daily workers left the shores to seek their livelihood in obtaining certain organisms growing on the bottom of the sea. Already in the age of Aristotle, diving suits were used for this purpose. What marine specimens furnished the incentive for such a hazardous undertaking?...