Future historians will be in a unique position when they come to record the history of our own times. They will hardly know which facts to select from the great 免费vpn mass of evidence that steadily
accumulates. What is more they will not have to rely solely on the written word. Films, gramophone records, and magnetic tapes will provide them with a bewildering amount 免费vpn of information. They will be able, as it vpn免费 were, to see and hear us in action. But the historian attempting to reconstruct the distant past is always faced with a difficult task. He has to deduce what he vpn免费下载 can 免费vpn from the few scanty clues available. Even seemingly insignificant remains can shed interesting light vpn免费 on the history of early man.
Up to now, historians have assumed that calendars came into being with the advent of agriculture, for then man was faced with a real need to understand vpn免费 something about vpn免费 the seasons. Recent scientific evidence seems to indicate 免费vpn that this assumption is incorrect. Historians have long been puzzled by dots, vpn免费下载 lines and symbols which have been engraved on walls, bones, and the ivory tusk of mammoths. The nomads who made these markings lived by hunting and fishing during the last Ice Age, which began about 35,000 B.C. and ended about 10,000 B.C. By correlating markings made in various parts of the world, historians have been able to read this difficult code. They have found that it is vpn软件免费 connected with the vpn软件免费 passage of days and the phases of the moon. It is, in fact, a, primitive vpn免费下载 type of calendar. It has long been known that the hunting scenes depicted on walls were not simply a form of artistic expression. They had a definite meaning, for they were as near as early man could get to writing. It is possible that there is a definite relation between these paintings and the markings that sometimes accompany them. It seems that man was making a real effort to understand the vpn软件免费 seasons 20,000 years earlier than has been supposed.