Art is considered by many people to be no more than a decorative means of giving pleasure. This is not always the case, however, at times, art may be seen to have a purely functional side as well. Such could be said of the sandpaintings of the Navaho Indians of the American Southwest; these have a medicinal as well as an artistic purpose.

    According to Navaho traditions, one who suffers from either a mental or a physical illness has in some way disturbed or get in touch with the supernatural—perhaps a certain animal, a ghost, or the dead. To break away from this, the ill person or one of his relatives will employ a medical man called a "singer" to perform a curing ceremony which will attract a powerful supernatural being. During the ceremony, which may last from 2 to 9 days, the "singer" will produce a sandpainting on the floor. On the last day of the ceremony, the patient will sit on this sandpainting and the "singer" will rub the sick or injured parts of the patient's body with sand from a specific figure in the sandpainting. In this way the patient absorbs the power of that particular supernatural being and becomes strong. After the ceremony, the sandpainting is destroyed so its power won't harm anyone.

    The art of sandpainting is handed down from old "singers". The materials used are easily found where the Navaho settle: brown, red, yellow, and white sandstone, which is ground（研磨）much as corn is made into flour. The "singer" holds a small amount of this sand in his hand and lets it flow between his fingers onto a clean, flat surface on the floor, with a steady hand and great patience. He is thus able to create designs of stylized people, snakes and other creatures that have power in the Navaho belief system. The traditional Navaho doesn't allow copying sandpaintings, since he believes the supernatural powers that taught him the craft have forbidden this; however, such reproductions can in fact be purchased today in tourist shops in Arizona and New Mexico. These are done by either Navaho Indians or by other people who wish to preserve this craft.

    For more and more young Chinese professionals, the first day back at work after the Lunar New Year holiday is the day they quit.

   The period after the Lunar New Year holiday, also known as Spring Festival, often sees Chinese workers on the move. This year, the number looking for new opportunities is supposed to be especially high.

    Mr. Zhu, a 27-year-old Beijing native, is one of the young workers looking for a better deal. “Salary is a big concern for me and I need a job that pays more, and my department can't provide good career development for me,” he said.

    An online survey by Zhaopin.com, a leading job-hunting website, provides further details on why China's young white-collar workers are so keen to move on.

    Low salaries are the biggest concern for 62% of the job-hunters, and overtime and a wide mismatch between low salaries and high housing costs are also the complaints. Two-thirds of them said they had to work at home after office hours, and a full 95% said they felt they were under heavy pressure because of the housing payment or rent.

    The survey also found that what was seen as a “good job” has changed. For the generation born in the 1970s, high salary and status is the key. For the generation born after 1980, work-life balance and respect in the office are also important.

    Zhao Bin, a 28-year-old woman who earns over 7,000 yuan a month working at a public relations company in Shanghai, said she would wait until the Lunar New Year to change her job. “My salary is OK for me, but I am working like crazy. So I want to find something comfortable, like being an English teacher in training schools.”

    When I was in the eighth grade, one caring teacher of mine taught me several useful little techniques. He told me to keep a notebook nearby when I was reading and that I should try to figure out what the main idea of every paragraph was so that I could understand the passages better. It seemed awfully boring at that time, but I decided to give it a try anyway.

    It didn't take long before I started reading a book called How to Read a Book that would completely change how I thought about the written word. Thanks to these techniques, I learned to get the most out of reading. I kept applying them over the years until I finally came up with a lot of little techniques for reading a book.

    I also eventually came to learn that there were a lot of different kinds of reading. For example, when I read a Stephen King novel, the interesting plot made me completely relaxed. Then there's reading to learn new things, which is what I do when I read personal finance books. There's also reading to understand and grow, which is easily the hardest and the most rewarding. The last kind of reading involves taking a piece of literature or a nonfiction book that you might read for simple pleasure and transforming it into something life-changing, or something that causes you to question some of your deeply-held ideas and beliefs.

    How to Read a Book really focuses on the latter two: books that you read to learn about a new topic or to learn a skill, and books that you read to learn about yourself. If you've ever been drawn to read to really improve yourself, this book is well worth the time to read even if it's a bit dry at times. Let's dig in.

    Children exposed to "safe" levels of air pollution in the womb(子宫) develop brain damage that damages their concentration, a study has shown.

    The research is the first too link common pollutants such as nitrogen(氮) dioxide and soot(油烟) to changes in the brains of unborn babies that mean they may struggle to focus at school in later life. The findings suggest that even comparatively clean city air could lead to worse academic performance and an increased risk of mental health problems such as addition or attention deficit hyperactivity disorder(缺陷多动障碍).

    In recent years scientists have found that children who grow up surrounded by air pollution are more likely to have a broad range of "neuro(神经)­developmental" difficulties, including autism and various kinds of cognitive(认知) damage. However, only a handful of studies have looked at the ways in which the poisonous gases and microscopic particles(微粒) that mothers and young children take in affect the brain during critical stages of its growth.

    A group led by Monica Guxens, of the Barcelona Institute for Global Health, found that exposure to air pollution before birth appeared to have slowed the development of several brain regions that play an important role in people's capacity for self­denial and sustained effort. This lack of inhibition could in turn cause "cognitive delays" when the children get older, the scientists argue in Biological Psychiatry.

    "We need this function in our daily life," Dr. Guxens said. "It controls our impulses(冲动) and our selective attention. Children need it to learn and for making decisions in later life. We're interested to see what will happen: is there going to be an impact on their academic work, are there going to be clinical implications? It might be that this will lead to problems later."

    The results were drawn from MRI scans of 873 children between the ages of six and ten in Rotterdam. Even though 99.5 percent of their mothers had lived with nanoparticle pollution levels well below EU legal limits while they were pregnant the pollution still appeared to have taken its toll(伤亡人数).

    Children who had been exposed to more pollution in the womb did worse on a test of their ability to block out irrelevant stimuli(刺激). They also had thinner outer layers in the precuneus(楔前叶) and the rostral middle frontal regions of their brains, both of which are involved in cognitive inhibition, which refers to the mind's ability to tune out stimuli that are irrelevant to the task at hand or to the mind's current state.

    Experiments on animals show that so­called fine particles are able to pass through the placenta and affect the brain of the fetus(胎儿). Dr Guxens said there were probably no such thing as a safe concentration of air pollution.

    Loud cheers and applause broke out at NASA's Jet Propulsion Lab on Monday, November 25, 2018, as the unmanned lander, called Insight, touched down on Mars, after nearly seven years from design to launch to landing.

    The great arrival of the spacecraft­designed to listen for quakes and shakes as a way to discover the Red Planet's inner secrets, how it formed billions of years ago and, how other planets like Earth took shape­marked the eighth successful landing on Mars in Nasa's history.

    Minutes after InSight landed on the surface of Mars, the first image was sent back, showing a wide flat area as seen through a dirty camera.

    The touchdown came after a nearly seven-month, 300 million-mile travel from Earth to Mars, during which the InSight spacecraft had to slow down from a speed of more than 12,000 mph. The spacecraft's heat shelter helped the lander survive temperatures as high as 2,700℉.

    Each step along the way was watched nervously at JPL, with updates delayed by the eight-minute light travel time between Earth and Mars. Mission controllers hugged each other with joy when the signals were received. "We are proud of everything that has gone on today," they told us reporters.

    The first picture of the surface of Mars was sent back to Earth by one of the MarCO nanosatellites (马可纳米卫星) that accompanied InSight during its travel to Mars. The dust from the landing made the view unclear. Pictures from it were expected to be clearer once the dust settled and the lens cover (镜头盖) was removed.

    Hours later, InSight's batteries were charging as expected. The InSight team also passed on another picture, taken by a different camera that's fixed on the lander's robotic arm. The view is clearer, showing the robotic arm and the seismometer, which is used to discover the actual movement of the ground.

Tricks to become a patient person

Here's a riddle: What do traffic jams, long lines and waiting for a vacation to start all have in common?{#blank#}1{#/blank#}. They're all situations where we could use a little extra patience.

In the digital age, we're used to having what we need immediately and right at our fingertips. However, research suggests that if we practiced patience, we'd be a whole lot better off. Here are several tricks.

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Thankfulness has a lot of benefits. {#blank#}3{#/blank#}. It can also help us practice more patience. "Showing thankfulness can foster self-control," said Ye Li, researcher at the University of California.

Make yourself wait

Instant gratification (满足) may seem like the most "feel-good" option at the time, but psychology research suggests waiting for things actually makes us happier in the long run. And the only way for us to get into the habit of waiting is to practice. Start with small tasks. {#blank#}4{#/blank#} or wait 10 extra minutes before going for that cake. You'll soon find that the more patience you practice, the more you start to apply it to other, more annoying situations.

Accept the uncomfortable

{#blank#}5{#/blank#}. When we experience something outside of our comfort zone, we get impatient about the circumstances. You should learn to say to yourself, "This is merely uncomfortable, not intolerable (无法忍受的)." You'll then gradually become more patient.

A. There is one answer

B. Keep a balanced state of mind

C. Practice showing or expressing gratitude

D. Attach importance to process and method

E. Put off watching your favorite show until the weekend

F So many of us believe being comfortable is the only state we will enjoy

G. Research shows it makes us happier, less stressed and even more optimistic