In the late 1950s, a Russian geneticist called Dmitry K. Belyaev attempted to create a tame (驯化的) fox population. Through the work of a breeding programme at the Institute of Cytology and Genetics at Novosibirsk, in Russia, he sought to find the evolutionary pathway of tame animals. His test subjects were silver-black foxes, a melanistic (带黑色的) version of the red fox that had been bred in farms for the color of their fur.

    He selected the animals based on how they responded when their cage was opened. About 10% of the foxes displayed a weak “wild-response”, meaning they were docile around humans. Those that hid in the corner or made aggressive voices were left in the farm. Of those friendly foxes, 100 females and 30 males were chosen as the first generations of parents.

    When the young foxes were born, the researchers hand-fed them. They also attempted to touch or pet the foxes when they were two to two-and-a-half months old, for strictly measured periods at a time. If the young foxes continued to show aggressive response, even after significant human contact, they were thrown away from the population—meaning they were made into fur coats. In each selection, less than 10% of tame individuals were used as parents of the next generation.

    By the fourth generation, the scientists started to see dramatic changes. The young foxes were beginning to behave more like dogs. They wagged their tails and “eagerly” sought contact with humans. By 2005-2006, almost all the foxes were playful, friendly and behaving like domestic dogs. The foxes could “read” human hints and respond correctly to gestures or glances.

    Nowadays people are facing lots of threats（威胁）all over the world.

   A serious threat to farmers in many parts of the world is erosion（侵蚀）.Erosion happens if a large area of land is cleared of trees and is then badly treated by the farmers.The rain and winds may gradually wash away,or blow away much of the topsoil.When this happens,crops of wheat and corn become weaker and weaker until nothing grows well.If erosion continues,it will turn good land into a desert.

    In the past,when erosion appeared,farmers sometimes moved to a new place to farm.Sometimes they could not move,but continued to try to grow food in the unhealthy soil.This caused them to sink into poverty.Soon some people realized that there was little rich,fertile soil in the world.The government began to try to stop erosion.

    One of the first experiments to stop erosion began in the United States in 1933.The experiment was carried out in the area of the Tennessee River.Flood and bad farming in this area had ruined the land that had once been rich.As a result,most of the people living around the Tennessee River were very poor.

The government built big dams across the river and stored the water for use during the dry season,when there was no rain.The government workers also helped the farmers fertilize their soil and to learn new farming methods which could stop erosion.

    In the beginning,the farmers were not interested.But soon,good healthy crops began to appear on the land where new methods were used.Ten years after that the crops were extremely good.The great success of this experiment led to similar projects in other parts of the world.

With the development of science and technology,people are trying to get rid of all the threats they are facing. However,it's not an easy job,because at the same time people are polluting their homeland.

                                                                                 Is There Life on Earth

    There was great excitement on the planet of Venus this week. For the first time Venusian scientists managed to land a satellite on the planet Earth, and it has been sending back signals as well as photographs ever since.

    The satellite was directed into an area known as Manhattan(named after the great Venusian astronomer Prof. Manhattan, who first discovered it with his telescope 20,000 light years ago). Because of excellent weather conditions and extremely strong signals, Venusian scientists were able to get valuable information as to the feasibility(可行性)of a manned flying saucer(飞碟)landing on Earth. A press conference was held at the Venus Institute of Technology.

    “We have come to the conclusion, based on last week's satellite landing,” Pro. Zog said, “that there is no life on the Earth.”

    “How do you know this?” the science reporter of the Venus Evening Star asked.

    “For on thing, Earth's surface in the area of Manhattan is composed of solid concrete and nothing can grow there. For another, the atmosphere is filled with carbon monoxide and other deadly gases and nobody could possibly breathe this air and survive.”

    “What does this mean as far as our flying saucer program is concerned?”

    “We shall have to take our own oxygen with us, which means heavier flying saucer than we originally planned.”

    “Are there any other risks that you discovered in your studies?”

    “Take a look at his photo. You see this dark black cloud floating over the surface of Earth?” We call this the Consolidated Edison Belt. We don't know what it is made of, but it could give us a lot of trouble and we shall have to make further tests before we send a Venus Being there.”

    “If what you say is true, won't this set back the flying saucer program several years?”

    “Yes, but we shall proceed as soon as the Grubstart gives us the added funds.”

    “Pro. Zog, why are we spending billions and billions of zilches to land a flying saucer on Earth when there is no life there?

    “Because if we Venusians can learn to breathe in an Earth atmosphere, then. We can live anywhere.”

    The first newspapers were written by hand and put up on walls in public places. The earliest daily newspaper was started in Rome in 59 BC. In the 700's the world's first printed newspaper was published. Europe didn't have a regularly published newspaper until 1609, when one was started in Germany.

    The first regularly published newspaper in the English language was printed in Amsterdam in 1620. In 1621, an English newspaper was started in London and was published once a week. The first daily English newspaper was The Daily Courant (《每日新闻》). It came out in March, 1702.

    In 1690, Benjamin Harris printed the first American newspaper in Boston. But not long after it was first published, the government stopped the paper. In 1704, John Campbell started The Boston Newsletter (《波士顿新闻通讯》), the first newspaper published in the American colonies. By 1760, the colonies had more than thirty daily newspapers. There are now about 1,800 daily papers in the United States.

    Today, as a group, English language newspapers have the largest circulation (发行量) in the world. But the largest circulation for a newspaper is that of the Japanese newspaper Asahi Dhimbun (《朝日新闻》). It sells more than 11 million copies every day.

    Being attractive isn't usually considered much of a disadvantage in today's world. Actually, there is the endless potential benefit about it, but researchers have found one area that being pretty makes life a challenge securing yourself a boring, low­paying job.

    This stands in contrast to a large body of research that attractiveness, in general, helps candidates in the selection process. For the most part good looks is a blessing. We treat pretty people more favorably in general, often vote for them more in elections, and pay them more in their professions. The research suggests that attractive people may be discriminated against in selection for relatively less desirable jobs.

    Researchers carried out four experiments involving more than 750 participants, including university students and managers who make hiring decisions in the real world. Participants were shown photos of two potential job candidates, one attractive and the other unattractive. Participants were then asked a series of questions designed to measure their opinions of the job candidates and whether they would hire these candidates for a less­than­desirable job.

    The less desirable jobs included a warehouse worker, housekeeper, customer service representative and the more desirable jobs included things like a manager, project director, IT elite(精英). In all experiments where they were asked, participants were significantly less likely to hire the attractive candidate for the less desirable job and more likely to hire the attractive candidate for the more desirable job.

    Ms Lee said, "In the selection decision for an undesirable job, decision makers were more likely to choose the unattractive individual over the attractive individual. Co­author Dr Madan Pillutla said, "It is interesting that decision makers consider others' opinions in their decisions. They thought that attractive individuals would want better outcomes, and therefore would be less satisfied, so they favored unattractive candidates when selecting for a less desirable job."

    The research also suggests the established view that attractive candidates are favored when applying for jobs might be limited to high­level jobs.

    Nowadays women appear to have a positive image of themselves as safer drivers than men.

    In a survey done for insurer MetLife, 51% of women said they drive more safely. The evidence is on their side: Men are 3.4 times more likely than women to get a ticket for careless driving and 3.1 times as likely to be punished for drunk driving. "Women are on average less aggressive and more law abiding (守法的) drivers, which leads to fewer accidents," the report says. However, not all male drivers share the same opinion. Of the men surveyed by MetLife, 39% claimed male drivers were safer. The findings did back them up on one point: automotive knowledge. The report showed that more men are familiar with current safety equipment such as electronic stability control, which helps prevent rollover accidents.

    Auto safety unavoidably matters to money. Insurance companies focus on what classes of drivers have the lowest dollar amounts of claims, and for now, that mainly includes women. In general, women pay about 9% less for auto insurance than men. A study by the website Insweb also showed that auto insurance rates are lower for women in most states. Among individual states, women get the greatest advantage in Wyoming (where they pay 20% less), South Dakota and Washington, D. C. where their insurance costs are 16% lower.

    "More than 11, 900 male drivers died in U. S. traffic accidents in 2009, compared with just under 4, 900 women drivers," according to the study. "Based on miles traveled, men died at a rate of 2.5 deaths per 100 million miles traveled, VS 1.7 deaths for women."