Twice a day the tides of the ocean covered them with their brine. Reluctantly they left the water and made a new home in the marshes and on the mud-banks that lay at the foot of the mountains. There was no more room for them at the bottom of the sea. Meanwhile the plants had increased in number and they had to search for new dwelling places. Still others (covered with scales) depended upon a swimming motion to go from place to place in their search for food, and gradually they populated the ocean with myriads of fishes. Others preferred to move about and they grew strange jointed legs, like scorpions and began to crawl along the bottom of the sea amidst the plants and the pale green things that looked like jelly-fishes. They took root in the slimy sediments which had been carried down from the tops of the hills and they became plants. Some of these cells were happiest in the dark depths of the lakes and the pools. But during all that time it was developing certain habits that it might survive more easily upon the inhospitable earth. The first living cell floated upon the waters of the sea.įor millions of years it drifted aimlessly with the currents. Upon these lifeless rocks the rain descended in endless torrents, wearing out the hard granite and carrying the dust to the valleys that lay hidden between the high cliffs of the steaming earth.įinally the hour came when the sun broke through the clouds and saw how this little planet was covered with a few small puddles which were to develop into the mighty oceans of the eastern and western hemispheres. Gradually, in the course of millions of years, the surface burned itself out, and was covered with a thin layer of rocks. In the beginning, the planet upon which we live was (as far as we now know) a large ball of flaming matter, a tiny cloud of smoke in the endless ocean of space. That is the reason why we are going to study him, rather than cats or dogs or horses or any of the other animals, who, all in their own way, have a very interesting historical development behind them. Man was the last to come but the first to use his brain for the purpose of conquering the forces of nature. If we represent the time during which it has been possible for animal life to exist upon our planet by a line of this length, then the tiny line just below indicates the age during which man (or a creature more or less resembling man) has lived upon this earth. In this chapter I shall tell you how (according to our best belief) the stage was set for the first appearance of man. We still know very little but we have reached the point where (with a fair degree of accuracy) we can guess at many things. Slowly, but with persistent courage, we have been pushing this question mark further and further towards that distant line, beyond the horizon, where we hope to find our answer. WE live under the shadow of a gigantic question mark. Previous Chapter Next Chapter The Setting of the Stage
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