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In the late 1960's, many people in North America turned their attention to environmental problems, and new steel-and-glass skyscrapers were widely criticized. Ecologists pointed out that a cluster of tall buildings in a city often overburdens public
Television-----the most pervasive and persuasive of modern technologies, marked by rapid change and growth-is moving into a new era, an era of extraordinary sophistication and versatility, which promises to reshape our lives and our world. It is an e
A painter hangs his or her finished pictures on a wall, and everyone can see it. A composer writes a work, but no one can hear it until it is performed. Professional singers and players have great responsibilities, for the composer is utterly depende
If by suburb is meant an urban margin that grows more rapidly than its already developed interior, the process of suburbanization began during the emergence of the industrial city in the second quarter of the nineteenth century. Before that period th
Archaeology is a source of history, not just a bumble auxiliary discipline. Archaeological data are historical documents in their own right, not mere illustrations to written texts, Just as much as any other historian, an archaeologist studies and tr
Before the 1930's ,workers were only paid as long as they were smart [00:05.69]If they were smart enough not to be ill,they were pai [00:10.06]If they were smart enough not to by injured,they were pai [00:13.66]And if they were very smart,they would
A new device is helping computers provide great amounts of informatio [00:27.35]The device is the compact disc or C [00:43.02]It was invented several years ag [00:57.50]to replace music records made of plasti [01:13.67]A CD is played on a machine tha
Ladies and gentleme [00:08.91]we are arriving at the scenic spot now [00:26.04]and there are a few things you need to remembe [00:43.76]First,remove all valuables from the coa [01:01.49]because we can't guarantee their safet [01:17.74]Second,note the
The best way to find a book in the librar [00:16.46]is to use the card catalogu [00:27.53]The catalogue is an index of all the book [00:46.24]All the cards are filed alphabeticall [01:01.20]and storied in drawers in large cabinet [01:16.04]There are
There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedicated to keeping orderly records of government units (states and statistics come from the same Latin root status) and a ge
The concept of obtaining fresh water from icebergs that are towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is being considered quite seriously by many nations,
A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun's very center. It is here that is to be found the source of the energy that the Sun constantly pours out into space as light and h
Human vision like that of other primates has evolved in an arboreal environment. In the dense complex world of a tropical forest, it is more important to see well that to develop an acute sense of smell. In the course of evolution members of the prim
Scattered through the seas of the world are billions of tons of small plants and animals called plankton. Most of these plants and animals are too small for the human eye to see. They drift about lazily with the currents, providing a basic food for m
An important new industry, oil refining, grew after the Civil war. Crude oil, or petroleum a dark, thick ooze from the earth had been known for hundreds of years, but little use had ever been made of it. In the 1850 s Samuel M. Kier, a manufacturer i
In the oysters were raised in much the same way as dirt farmers raised tomatoes- by transplanting them. First, farmers selected the oyster bed, cleared the bottom of old shells and other debris, then scattered clean shells about. Next, they planted f
Telecommuting-- substituting the computer for the trip to the job ----has been hailed as a solution to all kinds of problems related to office work. For workers it promises freedom from the office, less time wasted in traffic, and help with child-car
When did sport begin? If sport is, in essence, play, the claim might be made that sport is much older than humankind, for , as we all have observed, the beasts play. Dogs and cats wrestle and play ball games. Fishes and birds dance. The apes have sim
The United States is a land of immigrant [00:20.87]The immigrants brought many different styles of food with the [00:41.74]That's why you can find almost every kind of food in Americ [01:04.89]In some case [01:13.04]Americans have adopted foods from