extend back as far as the reptiles.
There is some evidence that the two types of sleep, dreaming and dreamless,
depend on the life-style of the animal, and that predators are
statistically much more likely to dream than prey, which are in turn much
more likely to experience dreamless sleep. In dream sleep, the animal is

Latin America. In reality, however, there was only one major war during
this time, the war between Britain and France. All other battles were
ancillary to this larger conflict, and were often at least partially
related to its antagonists' goals and strategies. France sought total 
domination  of Europe. This

from the great and the near great to the immortal. But today the Academy is
coming under heavy criticism both from the without and from within. Critics
contend that the selection of the winners often has less to do with true
writing ability than with the peculiar internal politics of the Academy and
of Sweden itself. A

scavengers or destroyed by weathering  before they can  be  fossilized. 
Ichthyosaurs  had  a higher  chance  of  being  preserved  than  did 
terrestrial creatures because, as marine animals, they tended to live in 
environments less subject to erosion. Stil

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 transportation and parking lot capacities.
Skyscrapers are also lavish consumers, and wasters, of electric power. In
one recent year, the

programs. These programs already have radically altered facades and floor
plans or are expected to do so in the not-too-distant future.
In New York City alone, six major institutions have spread up and out into
the air space and neighborhoods around them or are preparing to do so.
The reasons for this confluence  o

illustrations to written texts. Just as much as any other  historian,  an
archaeologist studies and tries to reconstitute the process that  has
created the human world in which we live -- and us ourselves in so far as
we are each creatures of our age  and social environment.  Archaeological 

political  and  social  framework,  such  as  later occurred  in  France 
and  Russia,  when  both    were  already  independent  nations. 
Significant changes  were  ushered  in,  but  they  were  not 

of extraordinary sophistication  and versatility, which promises to reshape
our lives and our world. It is an electronic revolution of sorts, made
possible by the marriage of television and computer technologies.
The word "television", derived from its Greek (tele: distant) and Latin
(visio: sight) roots, can liter

    Think twice before you swat a fly or squash a bug: A new study says insects contribute more than $57 billion (euro47 billion) a year to the U.S. economy.
    Think twice before you swat a fly or squash a bug: A new study says insects contribute more than $57 billion (euro47 billion) a year to the U.S. econ

In the 16th century, people celebrated New Year's Day from March 25 to April 1. Later, King Charles IX changed New Year＇s Day to January 1. But some people who lived in countryside did not the news; they still celebrated New Year on April 1, so others laughed at them and called them April Fools.
愚人节的起源
愚人节是可以向别人开玩笑的节日。没人知道

‘The most important of all human qualities is a sense of humour’
Biologically, there is only one quality which distinguishes us from animals: the ability to laugh. In a universe which appears to be utterly devoid of humor, we enjoy this supreme luxury. And it is a luxury, for unlike any other bodily process, laughter does seem to ser

‘Violence can do nothing to diminish race prejudice’
In some countries where racial prejudice is acute, violence has so come to be taken for granted as a means of solving differences, that it is not even questioned. What is really frightening, what really fills you with despair, is the realization that when it comes to the crunch, we

‘The space race is the world’s biggest money waster’
Almost every day we see something in the papers about the latest exciting developments in the space race. Photographs are regularly flashed to the earth from thousands and even millions of miles away. They are printed in our newspapers and shown on our television screens as a visib

‘Capital punishment is the only way to deter criminals’
Perhaps all criminals should be required to carry cards which read: Fragile: handle With Care. It will never do, these days, to go around referring to criminals as violent thugs. You must refer to them politely as ‘social misfits’. The professional killer who wouldn’t think twic