Bad news sells. If it bleeds, it leads. No news is good news, and good news is no news. Those are the classic rules for the evening broadcasts and the morning papers. But now that information is being spread and monitored(监控) in different ways, researchers are discovering new rules. By tracking people's e-mails and online posts, scientists have found that good news can spread faster and farther than disasters and sob stories.

    “The 'if it bleeds' rule works for mass media,” says Jonah Berger, a scholar at the University of Pennsylvania. “They want your eyeballs and don't care how you're feeling. But when you share a story with your friends, you care a lot more how they react. You don't want them to think of you as a Debbie Downer.”

    Researchers analyzing word-of-mouth communication—e-mails, Web posts and reviews, face-to-face conversations—found that it tended to be more positive than negative(消极的), but that didn't necessarily mean people preferred positive news. Was positive news shared more often simply because people experienced more good things than bad things? To test for that possibility, Dr. Berger looked at how people spread a particular set of news stories: thousands of articles on The New York Times' website. He and a colleague analyzed the “most e-mailed” list for six months. One of his first findings was that articles in the science section were much more likely to make the list than non-science articles. He found that science amazed Times' readers and made them want to share this positive feeling with others.

    Readers also tended to share articles that were exciting or funny, or that inspired negative feelings like anger or anxiety, but not articles that left them merely sad. They needed to be aroused(激发) one way or the other, and they preferred good news to bad. The more positive an article, the more likely it was to be shared, as Dr. Berger explains in his new book, “Contagious: Why Things Catch On.”

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Holidays

    {#blank#}1{#/blank#} People use money to buy food, furniture, books, bicycles and hundreds of other things they need or want. When they work ，they usually get paid in money.

    Most of the money today is made of metal or paper. {#blank#}2{#/blank#} One of the first kinds of money was shells.

    Shells were not the only things used as money. In China, cloth and knives were used. In the Philippine Islands, rice was used as money for a long time. Elephant tusks, monkey tails and salt were used as money in parts of Africa.

    The first metal coins were made in China. They were round and had a square hole in the centre. {#blank#}3{#/blank#}

    Different countries have used different metals and designs for their money. {#blank#}4{#/blank#} Sweden and Russia used copper to make their money. Later some countries began to make coins of gold and silver.

    But even gold and silver were inconvenient if you had to buy something expensive. Again the Chinese thought of a way to improve money. {#blank#}5{#/blank#}The first paper money looked more like a note from one person to another than the paper money used today.

    Money has had an interesting history from the days of shell money until today.

A. The first coins in England were made of tin (锡)．

B. But people used to use all kinds of things as money.

C. No one knows for certain when people began to use money.

D. People strung(串连) them together and carried them from place to place.

E. Money, as we know，is all made of paper.

F. They began to use paper money.

G. Today anyone will accept money in exchange for goods and services.

    French writer Frantz Fanon once said: ＂To speak a language is to take on a world, a culture.＂ Since the world changes every day, so does our language.

    More than 300 new words and phrases have recently made it into the online Oxford Dictionary, and in one way or another they are all reflections of today's changing world.

    After a year that was politically unstable, it's not hard to understand the fact that people's political views are one of the main drives of our expanding vocabulary. One example is ＂clicktivism＂, a compound of ＂click＂ and ＂activism＂. It refers to ＂armchair activists＂ — people who support a political or social cause, but only show their support from behind a computer or smartphone. And ＂otherize＂ is a verb for ＂other＂ that means to alienate (使疏远)people who are different from ourselves — whether that be different skin color, religious belief or sexuality.

    Lifestyle is also changing our language. For example, ＂fitspiration＂ — a compound of fit and inspiration — refers to a person or thing that encourages one to exercise and stay fit and healthy.

    The phrase ＂climate refugee＂ — someone who is forced to leave their home due to climate change—reflects people's concern for the environment.

 According to Stevenson, social media was the main source for the new expressions. ＂People feel much freer to coin their own words these days,＂ he said.

    But still, not all newly-invented words get the chance to make their way into a mainstream (主流的) dictionary. If you want to create your own hit words, Angus Stevenson, Oxford Dictionaries head of content development, suggests that you should not only make sure that they are expressive (有表现力的) and meaningful, but also have an attractive sound so that people will enjoy saying them out loud.

    Ever walked to the shops only to find, once there, you've completely forgotten what you went for? Or struggled to remember the name of an old friend? For years we've accepted that a forgetful brain is as much a part of aging as wrinkles and gray hair. But now a new book suggests that we've got it all wrong.

    According to The Secret Life of the Grown-up Brain, by science writer Barbara Strauch, when it comes to the important things, our brains actually get better with age. In fact, she argues that some studies have found that our brain hits its peak between our 40s and 60s — much later than previously thought.

    Furthermore, rather than losing many brain cells as we age, we keep them, and even produce new ones well into middle age. For years it's been assumed that brain, much like the body, declines with age. But the longest, largest study into what happens to people as they age suggests otherwise.

    This continuing research has followed 6,000 people since 1956, testing them every seven years. It has found that on average, participants performed better on cognitive (认知的) tests in their 40s and 50s than they had done in their 20s. Specifically, older people did better on tests of vocabulary, verbal memory (how many words you can remember) and problem solving. Where they performed less well was number ability and perceptual speed — how fast you can push a button when ordered. However, with more complex tasks such as problem-solving and language, we are at our best at middle age and beyond. In short, researchers are now coming up with scientific proof that we do get wiser with age.

    Neuroscientists are also finding that we are happier with aging. A recent US study found older people were much better at controlling and balancing their emotions. It is thought that when we're younger we need to focus more on the negative aspects of life in order to learn about the possible dangers in the world, but as we get older we've learned our lessons and are aware that we have less time left in life: therefore, it becomes more important for us to be happy.