Scientists in Argentina have created the world's first cow with two human genes that will enable it to produce human-like milk.

    Genetic engineering was used to introduce the "mothers'milk" genes into the animal before birth, according to the National Institute of Agribusiness Technology in Buenos Aires.

    As an adult, the cloned cow "will produce milk that is similar to that of humans", which will prove "a development of great importance for the nutrition of infants(婴儿)", said the institute. "The cloned cow, named Rosita ISA, is the first in the world with two human genes that contain the proteins present in human milk," said the statement.

    In April, scientists in China published details of research showing that they had created dairy cows which produced milk containing proteins found in human breast milk. But the Argentine team said the Chinese only introduced one human gene, while their research involved two,  meaning the milk will more closely resemble that of humans.

    “Our goal was to raise the nutrition value of cows'milk by adding two human genes, which do good to the immune system of infants,” said Adrian Mutto, from the National University of San Martin which worked with the institute.

    Cristina Kirchner, President of Argentina, said that the scientific institute made all Argentines proud. She also said that she had rejected the "honor" of having the cow named after her. "They came to tell me that the name is Cristina, but what woman would like to have a cow named after her? It appeared to me to be more proper to call it Rosita.”

    Teenagers' fitness is now a major concern, to which physical exercise is very important. It reduces stress and improves fitness. Exercise makes your body strong, and helps you to keep the right body weight. Sports scientists Dr. Helen Lopez offers the following advice to teenagers: “First, you need to find out your present level of fitness. Then you can design a programme that will help you become healthier.”

    Dr. Lopez suggests that there are three levels of fitness that need a change of lifestyle. “Overweight” means that the person gets very little exercise and often has a serious weight problem. “Inactive” mean that the person does not join in many physical activities, but is not seriously overweight. “Active” refers to people who take part in sports and other physical activities, but do not have a high fitness level.

    According to Dr. Lopez, overweight teenagers should keep active to keep healthy. “Ride a bike, play volleyball or basketball for a while, and go for a twenty-minute walk each day. All these will help to burn calories.” Inactive teenagers should do similar activities, but add some bending and stretching exercises, such as push-ups and sit-ups, starting with twenty of each a day. “Inactive people can take a little more exercise than overweight people because their bodies are stronger,” said Dr. Lopez. The same principle applies to active teenagers.

    Dr. Lopez suggests one hour a week or more on running and other forms of intensive exercise, together with fifteen minutes a day spent on stretching and bending activities. “These are really important in order to prevent injuries,” Dr. Lopez said. Some weight-training and other body-strengthening exercises could also be planned in the programme in order to increase the person's strength.

    It happened to me recently. I was telling someone how much I had enjoyed reading Barack Obama's Dreams From My Father and how it had changed my views (观点）of our President. A friend I was talking to agreed with me that it was, in his words, "a brilliantly (精彩地) written book". However, he then went on to talk about Mr. Obama in a way which suggested he had no idea of his background at all. I sensed that I was talking to a book liar.

    And it seems that my friend is not the only one. Approximately two thirds of people have lied about reading a book which they haven't. In the World Book Day's “Report on Guilty Secrets”. Dreams From My Father is at number 9. The report lists ten books, and various author: which people have lied about reading, and as I'm not one to lie too often (I'd hate to be caught out), I'll admit (承认) here and now that I haven't read the entire (全部的) top ten. But I am pleased to say that, unlike 42 percent of people, I have read the book at number one, George Orwell's 1984.I think it's really brilliant.

    The World Book Day report also has some other interesting information in it. It says that many people lie about having read Jane Austen, Charles Dickens, Fyodor Dostoevsky (I haven't read him, but haven't lied about it either) and Herman Melville.

    Asked why they lied, the most common reason was to "impress"（使留下深刻印象) someone they were speaking to. This could be tricky if the conversation became more in-depth!

    But when asked which authors they actually enjoy, people named J. K. Rowling, John Grisham, Sophie Kinsella (ah, the big sellers, in other words). Forty-two percent of people asked admitted they turned to the back of the book to read the end before finishing the story (I'll come clean: I do this and am astonished that 58 percent said they had never done so).

The Secret to Happiness

    A new report makes it clear that when it comes to the life satisfaction of UK citizens, the ball is in the government's court. For some time, sensible people have been arguing that governments need to focus less on economic growth and more on the wellbeing（幸福）of citizens. Be careful what you wish for.

    In response to this demand, from 2011 David Cameron instructed the Office for National Statistics to gather data on people's self-reported happiness and life satisfaction. Little practical good has come from this so far, but a new report by George Bangham for the Resolution Foundation is one of the best attempts to make useful sense of the data. He concludes: "The best prospects for policymakers targeting future increases in national wellbeing lie in raising job quality, raising incomes, particularly at the lower end, and policies to improve security in the housing market."

    The age correlation（相关）turns out to be certainly linked to politics, despite the fact that no political party can make a difference to your date of birth. The happiness of pensioners is not just a function of their age, but of policy. On average, 70-year-old boomers today are the most affluent retirees in history, often owning their own homes and in receipt of generous pensions. People of 70 are not going to be as content in 30 or 40 years' time if they are unable to retire, don't own their homes and have small incomes.

    However, there is one respect in which teens and recent retirees are remarkably similar. Compared to other age groups, they tend to inhabit a sweet spot of having high degrees of freedom. The typical 16-year-old has new freedoms without ever having had any serious responsibilities. The typical 70-year-old, having experienced a lifetime of work and family duties, has a very different kind of freedom, one born from relief.

    Besides, it should not surprise us to find that people tend to be happier when they have fewer worries. But this, too, has important political implications. If the government is really interested in raising overall national happiness, it has to make sure as many citizens as possible feel secure in their health, their housing and their incomes. Different states' records in achieving this is one important reason why Nordic countries repeatedly score highly in international life satisfaction surveys and North America underperforms relative to its GDP.

    Whichever way you look at it, there is no escaping the conclusion that increasing wellbeing across society requires joined-up, long-term policy efforts. This is exactly what the Resolution Foundation recommends.

    In an industry with low margins (利润) where the traditional wisdom is led by Walmart, the key to success is lowering operating costs. A big part of those costs are in labor, so it is no surprise that the retail industry has been a leader in using more part-time workers to keep labor costs down, holding the line on wages, not training, and with few exceptions, seeing employees as a cost to be minimized. There is no doubt that these businesses fight for every dollar of margin. Unlike trend-leading hi-tech companies which spend a lot of money on employees to get them innovated, retail industry can spend very limited money on their employees.

    What researchers found was that companies were often staffing their stores far too low, and that many stores tended to perform better with higher staffing levels and were more profitable. Let's let that sink in for a minute. The stores were making more money (with all other things being equal) when they spent more on employees.

    They also found that retailers didn't do a very good job when staffing levels are just the actual demand in those stores. In fact, they set staffing levels identically across stores, even when the needs of the stores varied considerably. The average store did not appear to be understaffed, but there were enough that were understaffed and effect on overall company profitability was substantial.

    Interestingly, the same researchers persuaded the retail chain to run an experiment with them and slightly raise staffing levels to the amount that their analysis of historical data suggests would be ideal. Yes, labor costs obviously jumped when they did that, but so did profits. In retail, labor is a small percentage of costs—the biggest part is the cost of the products they sell. So, the net effect was an increase in profits of $7.4 million across 168 stores on an annual basis.

    What can we learn from this? One question worth thinking of is: How can traditional retail industry survive the increasingly severe market? Especially now with the growth of online retail, the one thing stores still have going for them is one to one customer contact with salespeople. If retailers cut that down to almost nothing, then they have effectively eliminated their competitive advantage against online stores.

    To develop one's taste in English, the most effective way is to read English books extensively. Yet one may be at a loss to choose the appropriate books, especially as a beginner. As a native Spanish, I would like to share some of my experience.

    My first English novel was Jane Austen's Pride and Prejudice, recommended by many English teachers and professors as an ideal book for English learners. But my experience was somewhat disastrous. I had great difficulty in understanding the novel, let alone enjoying it. It's not the vocabulary that troubled me, but rather the way Austen constructs sentences, and her way of thinking, which seemed too remote to me at that time. My fading enthusiasm was much recovered after reading Hemingway's novel A Farewell to Arms. No long and complicated sentences. And I particularly liked his brief and straightforward (简洁的) style. So my first suggestion is, as a beginner, you'd better choose contemporary novels instead of classical ones.

    However, if you restrict yourself to novels you will miss a lot of treasures. English essays can at once inform you, entertain you, and improve your taste in English. The best example is Bertrand Russell's work. Its language is plain, yet you cannot help feeling the elegance and the peculiar sense of humor. His simple language enables his philosophy within the reach of ordinary people. Here comes my second suggestion—essays are indispensable.

    Never follow others' recommendations and opinions blindly, however famous or influential (有很大影响的) the person might be. We should be open to various ideas, but always think and determine for ourselves. As a saying goes, one man's meat is another man's poison. With that in mind, we are bound to find out our favorite writers through reading and develop our fine taste in English.