Muscles and Human Body It is in the joints of the human body that movements of the bones take place.The movement itself is caused by the pull of sheets and cords of very tough tissue called muscle. Muscle tissue has the special ability to shorten its...
Movie Music Accustomed though we are to speaking of the films made before 1927 as silent, the film has never been, in the full sense of the word, silent.From the very beginning, music was regarded as an indispensable accompaniment; when the Lumiere f...
Modern American Universities Before the 1850's, the United States had a number of small colleges,most of them dating from colonial days. They were small, church connected institutions whose primary concern was to shape the moral character of their st...
Mimicry in Plants Plant adaptations can be remarkably complex. Certain species of orchids, for instance, imitate female bees, other plants look and smell like dead animals, and still others have the appearance of stones. These strange adaptations to...
MARS Mars According to the best evidence gathered by space probes and astronomers, Mars is an inhospitable planet, more similar to Earth's Moon than to Earth itself-a dry,stark,seemingly lifeless world. Mars' air pressure is equal to Earth's at an al...
Marine Mammals Since there is such an abundance of food in the sea,it is understandable that some of the efficient, highly adaptable, warm-blooded mammals that evolved on land should have returned to the sea.Those that did have flourished. Within abo...
Lighthouses The first navigational lights in the New World were probably lanterns hung at harbor entrances. The first lighthouse was put up by the Massachusetts Bay Colony in 1716 on Little Brewster Island at the entrance to Boston Harbor. Paid for a...
International Business and Cross-cultural Communication The increase in international business and in foreign investment has created a need for executives with knowledge of foreign languages and skills in cross-cultural communication. Americans, howe...
Icebergs Icebergs are among nature's most spectacular creations, and yet most people have never seen one. A vague air of mystery envelops them. They come into being -- somewhere -- in faraway, frigid waters, amid thunderous noise and splashing turbul...
Hydrogen and Industries Hydrogen,the lightest and simplest of the elements, has several properties that make it valuable for many industries. It releases more heat per unit of weight than any other fuel.In rocket engines, tons of hydrogen and oxygen...
Henry Ford Although Henry Ford's name is closely associated with the concept of mass production, he should receive equal credit for introducing labor practices as early as 1913 that would be considered advanced even by today's standards. Safety measu...
Garza's Art Works Carmen Lomas Garza's eloquent etchings, lithographs, and gouache paintings depict primal images of the rural environment and communal cultural experience of Mexican decended people in the United States. In an introspective and perso...
Food and Health The food we eat seems to have profound effects on our health. Although science has made enormous steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that perhaps eighty...
Folk Cultures A folk culture is a small isolated, cohesive, conservative, nearly self-sufficient group that is homogeneous in custom and race with a strong family or clan structure and highly developed rituals. Order is maintained through sanctions b...
Evolution of Sleep Sleep is very ancient. In the electroencephalographic sense we share it with all the primates and almost all the other mammals and birds: it may extend back as far as the reptiles. There is some evidence that the two types of sleep...
