Human beings are innately curious concerning the world in which we live. We yearn to know what other places look like--- what the people, their26the animals and plant life, and landforms may be elsewhere. Today, high levels of education and the influence of television and other27media have combined to create in us a much28awareness of our entire world. We are now in a global economy and our industries must be globally29.We must think globally Material prosperity in many developed countries, with accompanying higher30of living, has made travel attainable for hundreds of millions of us.31travel can be undertaken for many reasons, the most common are pleasure, business and study.The subject of travel is exciting and fascinating. Humanlike beings have been32from place to place for about 1 million years Our early ancestors originated in eastern and southern Africa. But remains33these same forms of early humankind have also been found in China and Java(Indonesia). It has been estimated that34of this type took about 15000 years, but this is a brief35of time in the long history of humanity. Various theories have been proposed36the motivation for such amazing journeys. Foremost is that these wanderings were in search of food and to escape from danger. Another37is that people observed the migrations of birds and wanted to know where the38came from and where they were going. Recently, in the most dramatic discovery of its kind ever39,the preserved body of a man, who died 5000 years ago, was found in the ice in mountainous northern Italy. Some of the scientists40his body and accouterments(装备)have conducted that he was returning to his home in what is now Switzerland from a journey to the south of what is now Italy.

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