Jennifer Fish, a weather forecaster may soon be replaced by something truly fishier—the shark.

    Research by a British biology student suggests that sharks could be used to predict storms.

    Laura Smith, 24, is close to completing her study on shark's ability to sense pressure.

    If her studies prove the theory, scientists may be able to monitor the behaviour of sharks to predict bad weather.

    Miss Smith had previously studied the behaviour of lemon sharks in the Bahamas.

    She then used their close relatives, lesser spotted dogfish (猫鲨), for further research at Aberdeen University.

Her work—thought to be the first of its kind to test the pressure theory—resulted from the observation that juvenile blacktip sharks off Florida moved into deeper water ahead of a violent storm in 2001.

    Miss Smith said: “I've always been crazy about traveling and diving and this led me to an interest in sharks.”

“I was delighted to have been able to research in the area for my degree. I know there's so much more we need to understand—but it certainly opens the way to more research.”

    It has been discovered that a shark senses pressure using hair cells in its balance system.

    At the Bimini Shark Lab in the Bahamas, Miss Smith fixed hi-tech sensors to sharks to record pressure and temperature, while also tracking them using GPS (Global Positioning System) technology.

In Aberdeen, she was able to study the effects of tidal (潮汐的) and temperature changes on dogfish—none of which were harmed. She also used a special lab which can mimic (模拟) oceanic pressure changes caused by weather fronts.

    She is due to complete her study and graduate later this year. She says she will be looking for a job which will give her the chance to enrich her experience of shark research.

    For anyone still doubting the belief that our emotions influence our physical health, a new study from New Zealand should be able to settle the matter. It reports that the physical wounds of healthy seniors healed more quickly if they wrote about their most upsetting experiences.

    This confirms the results of a 2010 study, and extends those findings to cover older adults—a group that is likely to suffer wounds (as from surgery), and one with less access to other ways of lowering tension (such as exercise).

    Reported in the journal Psychosomatic Medicine, a research team led by the University of Auckland's Elizabeth Broadbent made a study featuring 50 healthy adults ranging in age from 64 to 97. They were asked to write for 20 minutes per day for three consecutive (连续的) days.

    Half were asked to write about the most upsetting experience in their life, describing their deepest thoughts, feelings, and emotions about the events, ideally not previously shared with others. The others were asked to write about their daily activities without mentioning emotions, opinions or beliefs.

    Two weeks after the third day of writing, all participants received a standard 4mm skin biopsy (皮下活体组织检查) on their inner arm. The very tiny wounds caused by the biopsy were photographed regularly over the following days to determine the rate at which they healed.

    On the 11th day after the biopsy, the wounds completely healed on 76.2 percent of those who had done the expressive writing. That was true of only 42.1 percent of those who had written about everyday activities.

    “The biological and psychological mechanisms (机体) behind this effect remain unclear,” the researchers wrote, noting that those who had done the expressive writing did not report lower stress levels or fewer depressive symptoms than the others in the control group. Even if they weren't consciously aware of feeling more relaxed or positive, the expressive writing appeared to have caused some sort of bodily reaction—probably involving their immune systems—that hastened their recovery.

    Cheating is nothing new. But it's becoming a lot more sophisticated. Republican vice-presidential candidate Sarah Palin was caught out once. A photo taken after the speech she'd given on a "return to conservative principles" showed her left hand covered with crib notes. These included the words "energy, budget cuts, tax" and "lift Americans' spirits". The word "budget" had been crossed out. Video footage also showed her reading from her hand when asked what top three things a conservative-led congress should do. Writing notes on your hand is one way to cheat in an exam. But these days, it's a lot easier ... especially with the Internet.

    Anyone who wants to cheat in an exam can probably find the answers online. There are hundreds of sites offering solutions to all sorts of tests. And it's a lucrative business. One operator in Oregon made $700,000 in about nine months before his arrest. The owner of a website in Ohio pocketed more than $300,000. And a famous overseas site is estimated to sell about 146,000 sets of answers and take in about $10 million per year. Actually, getting hold of the exam answers isn't that hard. Some do the exam themselves and use button cameras or document-scanning pens to copy the tests. Others organize for a group to take tests repeatedly until they can memorize the entire exam between them. Others simply bribe exam administrators.

    At the moment, such business is booming. More and more companies now require their employees to take professional exams. And hundreds of businesses and trade organizations have introduced formal certification programs to measure employee skills. In the US alone, at least 2 million exams are taken every year for information technology certification. But employees also have to take exams for all sorts of professions from crane operators to court reporters to school bus drivers and financial planners. Test officials estimate that hundreds of thousands of test-takers have used the Internet to buy answers for professional tests. And a recent survey found that 28 percent of test centres had at least one cheating incident over the last five years. In one incident, tens of thousands of soldiers obtained answers to tests in a range of military skills.

    Many see this as a cause for concern. Many tests are for work in sensitive areas such as defence installations and hospitals. Now, how would you feel if you knew that the people in charge of the computers controlling nuclear weapons might have cheated in their tests, and may not really know what they're doing?

    How many times do you check your Facebook page in a day to see whether your latest post has got another “like” or “thumbs(拇指) up”?

    Although you might be embarrassed to admit how many times you do this, don't worry—psychological findings have shown it's completely normal. In fact, the pleasure we derive from receiving a “like” is equal to that of eating chocolate or winning money, and we can't help wanting more. According to the findings, which observed 32 teens aged between 13 and 18, the feedback circuit (反馈回路) in the teens' brains is particularly sensitive, and the “social” and “visual” parts of their brains were active when they received “likes” on the social network. The research also showed that though the thumbs up might come from complete strangers, the good they derive from them worked all the same.

    So, does it mean we should try our best to win as many thumbs up as possible? Not necessarily so if we know the reasons behind our desire for attention. In “why do people long for attention” by M. Farouk Radwan, he explained several cases in which people naturally longed for attention. Radwan said people who were an only child, who were used to being the center of attention in their house, may try to copy these conditions. Feeling “overlooked and unappreciated” might also lead you to long for attention. Other times, the state of being jealous, or wanting to cover your mistakes may also contribute to such longings.

    In fact, too much desire for attention can create anxiety, and in turn ruin your happiness even when you get it. So what can we do about it? The answer is quite simple. “If people could adopt goals not focused on their own self-esteem（自尊）but on something larger than their self, such as what they can create or contribute to others, they would be less sensitive to some of the negative effects of pursuing self-esteem,” wrote psychology professor Jennifer Crocker.

    So perhaps the answer to our addiction to “likes” is simply to focus on something larger than ourselves—a hard, but a worthy one.

    Recently, a 1935 letter in which Ernest Hemingway detailed his catch of a 500lb blue marlin(青枪鱼), an adventure that is believed to have partly inspired his novel The Old Man and the Sea, has been sold for﹩28, 000 (£22, 000).

    The handwritten letter was sent by Hemingway on 8 May to the fishing editor of the Miami Herald, laying out in great detail how the author and his friend Henry Strater battled to keep sharks away from the marlin after catching it off the Bahamian island of Bimini.

    Nate D Sanders, the auction(拍卖) company which sold the letter, said it documented for the first time in Hemingway's own words not only the size of the marlin, but also the attack by sharks, reflecting the plot of the novel.

    The company added that Hemingway's account of the marlin catch differed from other anecdotes of it, one of which described Hemingway using a machine gun on the sharks, which is said to have attracted more sharks rather than frightened them away.

    The Old Man and the Sea was also inspired by an anecdote told by Hemingway's Cuban friend Carlos Gutierrez. In 1936, Hemingway wrote in a magazine that Carlos had told him about an old fisherman who caught a great marlin alone.

    Three years later, Hemingway told his editor Max Perkins that he was planning a short story about the old commercial fisherman who fought the swordfish all alone in his sailing boat. Instead, he ended up writing For Whom the Bell Tolls, not returning to the story about the old fisherman until January 1951. It won him the Pulitzer in 1953, and was specifically cited when he was awarded the Nobel Prize in 1954.

For the past 60 years,the African Wildlife Foundation (AWF) has protected animals,restored lost habitats and advocated for policy changes that benefit wildlife.Now,the conservation organization is trying a new approach.

This year,AWF launched the inaugural Benjamin Mkapa African Wildlife Photography Awards.The contest aims to reach a different audience.While photography competitions are nothing new,AWF hopes that the exhibition of winning entries will encourage African people to take a more active role in conservation.Its CEO Kaddu Sebunya said,"Africans need to take responsibility for the conservation of their heritage."

Photographers of all ages and backgrounds,professional and amateur,were invited to submit to the competition.A judging panel,comprised of photographers,conservationists,activists and safari guides,selected photos from 12 categories including "Art in Nature" "Coexistence and Conflict" and "Conservation Heroes".

 The "Conservation Heroes" category had special appeal for Kenyan conservation photographer Anthony Ochieng Onyango."I realized there was a communication gap because most of what was being communicated was data in scientific publications," said Onyango,adding that images are a simple way for people to connect to complex issues.

While there were many entries in the AWF competition,there's only one 19-year-old Cathan Moore from South Africa among the category winners.There's a lack of opportunity for young aspiring photographers on the continent.AWF is seeking grants and partnerships to enable more African people to participate next year,and to make nature photography competitions more accessible to those unable to pay or buy expensive camera equipment,allowing people to use whatever camera they have and photograph wildlife in urban environments.

Sebunya hopes that the competition can open up a dialogue about conservation and why it's so important for Africa's future.Many people in Africa look at conservation as a thing done by and for foreigners,said Sebunya.While he praised the work of international NGOs,he emphasized that it's vital that African voices are heard and for local people to lead conservation efforts.