When night descended upon the earth, he hid his wife and his children in a hollow tree or behind some heavy boulders, for he was surrounded on all sides by ferocious animals and when it was dark these animals began to prowl about, looking for something to eat for their mates and their own young, and they liked the taste of human beings. It was a world where you must either eat or be eaten, and life was very unhappy because it was full of fear and misery. In summer, man was exposed to the scorching rays of the sun, and during the winter his children would freeze to death in his arms. When such a creature hurt itself, (and hunting animals are forever breaking their bones or spraining their ankles) he had no one to take care of him and he must die a horrible death. Like many of the animals who fill the Zoo with their strange noises, early man liked to jabber. That is to say, he endlessly repeated the same unintelligible gibberish because it pleased him to hear the sound of his voice. In due time he learned that he could use this guttural noise to warn his fellow beings whenever danger threatened and he gave certain little shrieks which came to mean "there is a tiger!" or "here come five elephants." Then the others grunted something back at him and their growl meant, "I see them," or "let us run away and hide." And this was probably the origin of all language. But, as I have said before, of these beginnings we know so very little. Early man had no tools and he built himself no houses. He lived and died and left no trace of his existence except a few collar-bones and a few pieces of his skull. These tell us that many thousands of years ago the world was inhabited by certain mammals who were quite different from all the other animals--who had probably developed from another unknown ape-like animal which had learned to walk on its hind-legs and use its fore-paws as hands--and who were most probably connected with the creatures who happen to be our own immediate ancestors. It is little enough we know and the rest is darkness. PREHISTORIC MAN PREHISTORIC MAN BEGINS TO MAKE THINGS FOR HIMSELF. EARLY man did not know what time meant. He kept no records of birthdays or wedding anniversaries or the hour of death. He had no idea of days or weeks or even years. But in a general way he kept track of the seasons for he had noticed that the cold winter was invariably followed by the mild spring--that spring grew into the hot summer when fruits ripened and the wild ears of corn were ready to be eaten and that summer ended when sudden gusts of wind swept the leaves from the trees and a number of animals were getting ready for the long hibernal sleep. But now, something unusual and rather frightening had happened. Something was the matter with the weather. The warm days of summer had come very late. The fruits had not ripened. The tops of the mountains which used to be covered with grass now lay deeply hidden underneath a heavy burden of snow.