一篇北美澳洲文化，政治什么方面都可以的英文文章，字数在1200左右的

Prehistoric Cultures in North America

North American continent stage of the indigenous culture of primitive society. Some from the Pleistocene era to the late 15th century. Distributed in the United States, Canada and Greenland, the vast region. In this region due to different natural conditions and divided into the Arctic, sub-Arctic, the eastern forest areas, the Great Plains, the Basin, northwest coast of California and southwestern areas. Its residents is now the North American Indians and Eskimos of the ancestors. North American prehistoric culture of self, but the slower, remains primitive society stage. Europeans came to the American continent from the beginning until the 1960s, after several hundred years of continuous exploration, have a basic understanding of the prehistoric culture of the North American landscape.
According to archaeological and anthropological research, the ancient residents of North America from Asia through the Bering Strait land bridg