Most people who move to a foreign country may experience a period of time when they have a lot of stress in the new culture. This feeling is often called “culture shock” and it is important to learn how to deal with culture shock. First of all, you should know that everyone in a new situation will go through some form of culture shock. There are four general stages of cultural adjustment(适应).

    The first stage is usually referred to as the honeymoon stage. Upon arriving in a new environment, you'll be interested in the new culture. Everything will seem exciting, and everyone will seem friendly and helpful.

    The second stage is called the withdrawal stage. The excitement that you felt before changes to frustration(沮丧) as you find it difficult to deal with new problems. The language is hard to learn; friends are hard to make; simple things like shopping and going to the bank are challenges. It is at this stage that you are likely to feel anxious and homesick.

If you are one of those who manage to stick it out (坚持下来), you will enter the third stage—- the recovery stage. At this point, you'll feel more confident in the new culture. You'll start to understand and accept the way things are done and the way people behave in your new environment.

The last stage is the stability stage—- this is the point when people start to feel at home in the new culture. At this stage, you will behave well in the new culture, and prefer some aspects(方面) of the new culture to your own culture.

    There is, in a sense, a fifth stage to this process. If you decide to return home after a long period in a new culture, you may experience what is called “reverse culture shock”. This means that you may find aspects of your own culture “foreign”, because you're so used to the new culture. Reverse culture shock is usually pretty mild(温和的) and doesn't last for very long.

    Flu easily spreads from one person to another. This is especially true to people who are weak. If you are weak, you are more likely to catch flu easily. Do you know how you can avoid flu?

    Keep in good health

    The best antidote (解药) to illness is good health. You can eat everything you want but make sure that your diet is healthy. The healthier you are, the better for you to avoid any type of illness around. Most doctors suggest plenty of fresh fruit juice and water in order that one can avoid flu.

    Stay away from people with flu

    If a member of the family or a friend has flu, stay away from them until they are well. Flu is very communicable and you can catch it by going with the person with flu. Wear a mask (面罩) and avoid using things that the person with flu is using.

    Exercise

    Exercising will make you stronger which means a stronger immune (免疫的) system too. Exercise often so that your body will keep healthy. It doesn't matter what kind of exercise.

    What is important is you are making your body stronger to prevent illness from attacking you.

    Be happy

    Happy people are healthy people. Their life is stress-free, so they are more likely to be safe from illness. If you are unhappy, which affects your immune system, you will easily get sick.

    Avoiding the flu is easy. Just boost (增强) your immune system and it will take care of the rest.

    Kettle's Yard, Cambridge

    This modern-art gallery in a Victorian house was founded in the 1950s by Tate Jim and reopened in February following a two-year redevelopment by Jamie Fobert Architects, the team behind the 2017 Tate Steves extension. This means a new cafe, a four-floor education wing and improved gallery space that can accommodate more visitors. The gallery's permanent collection includes works by Joan Miró, Henry Moore and Barbara Hepworth.

    Being Brunel, Bristol

    To celebrate the life and work of famous civil engineer Isambard Kingdom Brunei, Being Brunei will open in March on Bristol's harbourside. The museum will include a range of interactive and entertaining exhibits, including talking portraits of his friends and family and personal possessions, including an 1821 school report. It is a good place for families to strengthen connections.

    Royal Academy of Arts, London

    The RA reopens on 19 May for its 250th anniversary, following a £50m renovation (翻新) with a gallery and expanded exhibition programme. These will include three day-lit galleries, which will host exhibitions with a focus on contemporary art and architecture. The grand frontwall of the Burlington Gardens building has also been restored—possibly the first time it's had a proper clean in its 150 year history.

    V&A, Dundee

    One of the most significant new openings of the year will be Scotland's first design museum and also the first V&A anywhere outside of London on 15 September. The museum building sits on the river Tay. It will celebrate Scottish design and objects in its collection.

    Some spiders hunt on the ground, others build webs to trap their food, but the grass water spider catches its prey by running along the surface of the water.

    This special water spider lives on the grassy banks of streams where mosquitoes, damsel flies and other insects come to feed and breed.

    Although it is one of the largest spiders in New Zealand, it has an unusual ability. It doesn't disturb the water as it waits for its meal, and there is barely a ripple(波纹) when it skims(掠过) across the surface at lightning speed to catch its prey.

    Grass water spiders deal swiftly with larger insects like damsel flies by pulling their heads under the water and holding them there until they drown.

    After a meal, the grass water spider spends up to half an hour grooming(修饰) itself. It wipes its eight eyes, brushes its antennae(触角), and takes special care to clean the hairs on its body.

    It is the hairs that trap tiny bubbles(泡沫) of air so that the spider can run down a blade(叶片) of grass and stay underwater for up to an hour when it is frightened. The hairs also keep the spider dry, even underwater.

    It is only when the female spider is caring for the young that she does not hunt on the water. After mating, she produces a large egg sac(囊), which she carries around for five weeks. Once the eggs start to hatch, she attaches the sac to some blades of grass or a thistle. She then tears the sac open and releases the tiny spiders into the nursery web.

    Finland is the happiest place on Earth, according to the 2018 World Happiness Report of 156 nations.

    The report, released Wednesday by the United Nations'Sustainable Development Solutions Network, ranks the countries of the world based on six different categories of well-being: income, freedom, trust, life expectancy, generosity and social support. This year's report also pays special attention to the happiness of each country's immigrants.

    The U.S. dropped four spots from 2017 and landed in 18th place, and last year's winner, Norway, came in second place — followed by Denmark, Iceland and Switzerland.

    “The top five countries all have almost equally high values for the six factors found to support happiness, and four of these countries—Denmark, Switzerland, Norway and now Finland — have been in first place in the six World Happiness Report rankings since the first report" in 2012, "co-editor John Helliwell told CNN. “In a division with such excellent teams, changes in the top spot are to be expected."

    Rounding out the top 10 happiest countries was Canada in sixth place, then New Zealand, Sweden and Australia. The order of the top 10 nations changed from the 2017 list but the countries did not, according to the report. They were also 10 of the 11 top spots in the immigrant happiness category (including Mexico — 24th overall, but 10th in immigration).

    "The most striking finding of the report is the remarkable consistency between the happiness of immigrants and the locally born," Helliwell said in a statement. "Although immigrants come from countries with very different levels of happiness, their reported life evaluations resemble those of other residents in their new countries. Those who move to happier countries gain, while those who move to less happy countries lose."

    Other major world powers placed in significantly low spots on the list. Germany came in 15th, the UK was 19th — followed by Japan in 54th place, Russia in 59th and China in 86th.

    The report, based on surveys completed by citizen volunteers, came just under a week before World Happiness Day on March 20, when the UN declared to recognize "the relevance of happiness and well-being as universal goals and aspirations in the lives of human beings around the world and the importance of their recognition in public policy objectives"

If you've ever seen a sparrow steal your dog food or a crow open a garbage bag, you get a sense of that some birds have learned to take advantage of new feeding opportunities—a clear sign of their intelligence. Scientists have long wondered why certain species of birds are more innovative than others, and whether these capacities stem from larger brains or from a greater number of neurons（神经元） in specific areas of the brain.

It turns out that it's a bit of both, according to a recent study by an international team that included members from McGill University published in Nature Ecology and Evolution.

The researchers used a new technique to estimate the number of neurons in a specific part of the brain called the pallium in 111 bird species. The pallium in birds is equal to the human cerebral cortex（大脑皮层）, which is involved in memory, learning, reasoning, and problem-solving, among other things. When these estimates about neuron numbers in the pallium were combined with information about over 4,000 feeding innovations, the team found that the species with the higher numbers of neurons in the pallium were also likely to be the most innovative.

"The amount of time chicks spend in the nest as their brains develop might also play acrucial role in the evolution of intelligence," says McGill University Emeritus Professor Louis Lefebvre who spent more than 20 years gathering examples of feeding innovations. "Larger species of crows and parrots, which are known for their intelligence, spend longer in the nest, which allows more time for the brain to grow and accumulate pallial neurons."

The results of the study help to deal with previously opposed views of the evolution and significance of brain size and show how a life-history perspective helps to understand the evolution of cognition.