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Civilization: The distinctly human attributes and attainments of a particular society.History, Ancient: The period of history before 500 of the common era.History, Medieval: The period of history from the year 500 through 1450 of the common era.Archaeology: The scientific study of past societies through artifacts, fossils, etc.History, 15th Century: Time period from 1401 through 1500 of the common era.Mummies: Bodies preserved either by the ancient Egyptian technique or due to chance under favorable climatic conditions.Paleopathology: The study of disease in prehistoric times as revealed in bones, mummies, and archaeologic artifacts.History, 17th Century: Time period from 1601 through 1700 of the common era.History, 16th Century: Time period from 1501 through 1600 of the common era.History, 18th Century: Time period from 1701 through 1800 of the common era.Indians, South American: Individual members of South American ethnic groups with historic ancestral origins in Asia.History, 19th Century: Time period from 1801 through 1900 of the common era.Agriculture: The science, art or practice of cultivating soil, producing crops, and raising livestock.Climate: The longterm manifestations of WEATHER. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)History, 20th Century: Time period from 1901 through 2000 of the common era.Geography: The science dealing with the earth and its life, especially the description of land, sea, and air and the distribution of plant and animal life, including humanity and human industries with reference to the mutual relations of these elements. (From Webster, 3d ed)