The Healthy Habits Survey(调查)shows that only about one third of American seniors have correct habits. Here are some findings and expert advice.

    1). How many times did you brush your teeth yesterday?

    Finding：A full 33% of seniors brush their teeth only once a day.

    Step：Remove the 300 types of bacteria in your mouth each morning with a battery-operated toothbrush. Brush gently for 2 minutes, at least twice a day.

    2). How many times did you wash your hands or bathe yesterday?

    Finding：Seniors, on average, bathe fewer than 3 days a week. And nearly 30%wash their hands only 4 times a day-half of the number doctors recommend.

    Step：We touch our faces around 3,000 times a day-often inviting germs(病菌)to enter our mouth, nose, and eyes. Use toilet paper to avoid touching the door handle. And, most important, wash your hands often with hot running water and soap for 20 seconds.

    3). How often do you think about fighting germs?

    Finding：Seniors are not fighting germs as well as they should.

    Step：Be aware of germs. Do you know it is not your toilet but your kitchen sponge(海绵)that can carry more germs than anything else? To kill these germs, keep your sponge in the microwave for 10 seconds.

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    Science Museum, London

    Runs: Until 5 May

    Price: £7

    Exhibition about the Large Hadron Collider which uses theatre and video, as well as handmade works to recreate the experience of the real place and show the work behind the discovery of the Higgs 、 boson. Well worth it for anyone studying physics or simply interested.

    Weston Park Museum, Sheffield

    Runs: Until 5 May Price: Free for students

    Underneath the 1960s-built Castle Market in Sheffield, there are the remains of a historical castle. Now that the market is being moved, there has been a sudden growth in interest in the old castle.

    Seacity Museum, Southampton

    Runs: Continued

    Price: Entrance to the museum is £4.50 for students

    Explores the Titanic disaster and its effect on Southampton, where more than five-hundred families lost a family member to the disaster. The exhibition recreates the sights and sounds of 1912 Southampton and ends ill the Disaster Room, where a series of events from the moment of the Titanic hit the iceberg are explored using powerful oral description from survivors.

    The Guildhall, Leicester

    Runs: Until 1 June

    Price: Free

    This exhibition tells the history of King Richard III and of the search for his lost remains, eventually found underneath a car park two years ago. The exhibition can give visitors a rounded view of the life of the king and how he was discovered. Great for history students.

    Many people go to school for an education. They learn languages, history, geography, physics, chemistry and mathematics. Others go to school to learn a skill so that they can make a living. School education is very important and useful. Yet no one can learn everything they want to know. The teacher's job is to show his students how to learn. He teaches them how to read and how to think. So, much more is to be learned outside school by the students themselves.

    It is always more important to know how to study by oneself than to memorize some facts or a formula (公式). It is usually quite easy to learn a certain fact in history or a formula in mathematics. But it is very difficult to use a formula in working out a maths problem. Great scientists, such as Einstein, Newton and Galileo didn't get anything from school. But they were all so successful. They invented so many things for mankind.

    The reason for their success is that they knew how to study. They read books that were not taught at school. They worked hard all their lives, wasting not a single moment. They would ask many questions as they read and they did thousands of experiments.

    Above all, they knew how to use their brains.

    Last night's meteor(流星) shower left many people in Emerald Valley dissatisfied. They gathered in the suburbs of the city with heavy telescopes，expecting to watch the brightly burning meteors passing through the sky. However, what they found was a sky so brightened by the city's lights that it darkened the light of the meteors passing overhead.

    “My family was so frustrated，” admitted town resident Duane Cosby, “We wanted to make this an unforgettable family outing，but it turned out to be a huge disappointment.”

    Astronomers—scientists who study stars and planets—have been complaining about this problem for many years. They say that light pollution prevents them from seeing objects in the sky that they could see quite easily in the past. They call on people and the government to take measures to fight against it.

    Besides professional and amateur(业余的) star observers, there is yet a population that suffers even more from light pollution. This population consists of birds，bats, frogs, and snakes etc. For example, outdoor lighting severely affects migrating(迁徙的)birds. According to the International Dark­Sky Association, “100 million birds a year throughout North America die in crashes with lighted buildings and towers. ”

    Countless animals injuries and deaths result from the use of artificial lighting. Clearly, people enjoy the benefits of lighting their evenings, but some scientists think it can be harmful to humans, too. They worry that exposure to light while sleeping can increase people's chances of getting cancer.

    Emerald Valley is only one community that is becoming aware of the negative effects of light pollution. For years, Flagstaff, Arizona has enforced lighting rules in its city in order to help astronomers with their observations. Similar efforts have been made worldwide, and a movement is underway to remind us to turn off lights when we are not using them, so that other creatures can share the night.

    When people find themselves in difficult conflicts, they often turn to mediation(调解). Mediator are advised to listen attentively, avoid favoring the ideas of one party, and make both sides feel at ease. Surprisingly, new research that my colleagues and I conducted shows that, to effectively help people settle their conflicts, mediators should adopt a hostile(敌对的) attitude rather- than a calming one. A hostile mediator, we find, brings better results than a nice one

    Why would adding more negativity to an already hostile situation prove beneficial? Consider how parents typically react when they can't get their children to stop quarreling: "I don't care who started it, both of you, go to your rooms!" At first sight, a calm mediator seems likely to be more effective. But as anyone with brothers or sisters knows, parents' seemingly unsympathetic treatment of the situation can have an unusual effect,

    In our research, we created situations in which pairs of negotiators were part of a heated conflict. In some cases, the mediator had a "nice" approach-calm and polite. In others, he was hostile-aggressive and somewhat rude. Across different types of conflicts, we found that negotiators were more willing and able to reach an agreement in the presence of a hostile mediator than in the presence of a nice one.

The main result of the test is not that hostility pays off. In fact, recent research has documented the social costs of negative behavior. For example, being the target of rude behavior reduces people's performance on a variety of tasks. Other research shows the social benefits of positive behavior. People are more likely to close deals and become future business partners.

    Even with the widespread social benefits of positive behavior and costs of negative behavior, hostility can pay off in certain situations.

It's 1:30 am in Kenya's populated north, and 50 people are lying on their backs on the shore of a dried-up river, staring up at the night sky. These stargazers have travelled 250 miles to Samburu to witness the Perseid meteor shower(英仙座流星雨). They are not disappointed: Every few minutes, arrows of light shoot across the sky like silent fireworks.

The Star Safari is organised by a Kenyan astronomer, Susan Murabana, who has brought a 50 kg,170 cm-long telescope to allow the group to view Mars and deep-sky objects. But here in Samburu, where light pollution is minimal, the Perseid meteors—visible with the naked eye (裸眼)—steal the show.

Every two months, Murabana and her husband load their telescope on to the roof of their 4×4 and set off to rural communities, where they give up to 300 children a chance to view the planets and learn about constellations (星座) and the basics of astrophysics. They primarily targets schools in remote areas because of her mission to give girls an opportunity that she wishes had been available to her.

"When I started this work, I didn't see people who looked like me. I was a lone ranger and I wanted to change that." says Murabana.

"There is a common misconception in Kenya that astronomy in general is hard, boring, and only for boys," she adds. "I'd like to teach young girls that astronomy is neither of these things and that they, too, can become astronomers," says Murabana.

Murabana's passion for astronomy began in her early 20s when her uncle invited her to join a similar outreach session organized by the Cosmos Education. "That was a gamechanger. If an outreach group had come to me when I was a young teenager, my attitude towards a career in astronomy would have been positive. I ended up studying sociology and economics, but maybe I would have desired to be an astronomer," she says.

Inspired by the Cosmos Education, Murabana completed an online master's degree in astronomy with the James Cook University in 201l and set up her own outreach programme. She looked to Dr Mae Jemison, the first black woman in space, as a role model. "I hope that one day, through this work, I will spark a chain reaction that leads to the first African woman in space."