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The Adjustment in Understanding of Man"s Relation to the Physical Universe
Nowadays the scattering of galaxies and the astounding abundance of stars are forcing those who ponder such matters to a further adjustment of their concept of the place and function of man in the material universe.
In the history of the51human mind， with its increasing knowledge of the surrounding context， there must have been a time when the philosophers of the52tribes began to realize that the world was not simply centered on man himself. The geocentric concept， which accepted a universe centered on the earth， then became common53
The second adjustment in the understanding of man"s relation to the physical universe was not generally acceptable54the sixteenth century. Copernican revolution soundly55the heliocentric Concept， the theory of a universe56on the sun. Man is a stubborn adherent to official dogma; eventually， however， he accepted the sun as the center.
Then， forty years ago， came the need for a third adjustment. This57has deeply exploded man"s pride and58， for it has carried with it the knowledge of the appalling number of galaxies.
The galactocentric universe59puts the earth and its life near the edge of one great galaxy in a universe of millions of galaxies. Man becomes peripheral among the billions of stars of his own Milky Way; and， according to the revelations of paleontology and geochemistry， he is60and apparently transient in the61of cosmic time.
The downgrading of the earth and sun and the elevation of the galaxies is not the end of this62of scientific pilgrims through philosophic fields. The need for another63adjustment now64not wholly unexpected by scientists，65wholly the result of one or two scientific revelations.
Our new problem concerns the spread of life throughout the universe. As unsolicited spokesmen for all the earthly organisms of land， sea， and air， we ask the thrilling question: Are we alone？
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Home Schooling
All children in the United States have to receive an education, but the law does not say they have to be educated at school. A number of parents prefer not to send their children to school,46There are about 300,000 home-schoolers in the United States today. Some parents prefer teaching their children at home because they do not believe that public schools teach the correct religious values; others believe they can provide a better educational experience for their children by teaching them at home.47David Guterson and his wife teach their three children at home. Guterson says that his children learn very differently from children in school.48For example, when there is heavy snowfall on a winter day, it maystart a discussion or reading about climate, snow removal (去除) equipment, Alaska, polai bears (北极熊) ,and winter tourism.A spring evening when the family is out watching the stars is a good time to ask questions about satellites and the space program49
Home schooling is often more interesting than regular schools, but critics say that home-schooled are outsiders who might be uncomfortable mixing with other people in adult life.50However, most parents don&39;t have the time or the desire to teach their children at home, so schools will continue to be where most children get their formal education.
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