You have undoubtedly washed your car with one of the porous, flexible balls called a sponge. Possibly as you washed, you wondered just how they were made. You may even be one of the many persons who thinks that sponges are plants. The fact is that they are neither manufactured nor are they plants but […]

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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 […]

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