The modern technologies on the planet. Earth would be rather a puzzle to an observer from another planet. If he happened to land in Germany , the most conspicuous animals in sight would be automobiles, and if he examined these vigorous hard-shelled creatures, he would find that each contains one or more soft, feeble organisms that appear notably helpless when removed from their shells. He would decide , after talking with these defenseless creatures, that they had no independent existence. Few of them have anyting to do with the production or transportation of food. They need clothing and shelter, but do not provide them for themselves. They are dependent on their distant fellows in thousands of complex ways. When isolated, they usually die-just like worker-ants that wander helplessly and hopelessly if separated from their colony.