A new generation addiction(上瘾) is quickly spreading all over the world. Weboholism（网瘾）, a twentieth century disease, affects people from different ages. They surf the net, use e-mail and speak in chat rooms. They spend many hours on the computer, and it becomes a compulsive habit. They cannot stop, and it affects their lives.

    Ten years ago, no one thought that using computers could become compulsive behavior that could affect the social and physical life of computer users. Such behavior has seriously affected teenagers and college students. They are likely to log(写日志) on computers and spend long hours at different websites.

    They become hooked(着迷) on computers and gradually their social and school life is affected by this situation. They spend all free time surfing and don't concentrate on homework, so this addiction influences their grades and success at school. Because they can find everything on the websites, they hang out there. Moreover, this addiction to websites influences their social life.

    They spend more time in front of computers than with their friends. The relation with their friends changes. The virtual life becomes more important than their real life. They have a new language that they speak in the chat rooms and it causes cultural changes in society.

    Because of the change in their behavior, they begin to isolate themselves from society and live with their virtual(虚拟的) friends. They share their emotions and feelings with friends who they have never met in their life. Although they feel confident on the computer, they are not confident with real life friends they have known all their life. It is a problem for the future. This addictive behavior is beginning to affect all the world.

    Adding math talk to story time at home is a winning factor for children's math achievement, according to a new research from a university. The study from psychologists Sian Beilock and Susan Levine shows a marked increase in math achievement among children whose families used Bedtime Math, an iPad app that delivers engaging math story problems for parents and children to solve together.

    Even children who used the app with their parents as little as once a week saw gains in math achievement by the end of the school year. The app's effect was especially strong for children whose parents tend to be anxious or uncomfortable with math.

    Previous research from this group has demonstrated the importance of adults' attitudes about math for children's math success. For example, a recent study found that math-anxious parents who help their children with math homework actually weaken their children's math achievement.

    The new findings demonstrate that structured, positive interactions around math at home can cut the link between parents' uneasiness about math and children's low math achievement.

     “Many people experience high levels of anxiety when they have to solve a math problem, with a majority of adults feeling at least some worries about math,” said Beilock, professor in Psychology and author of Choke, a book about stress and performance. “These math-anxious parents are probably less likely to talk about math at home, which affects how competent their children are in math. Bedtime Math encourages a dialogue between parents and kids about math, and offers a way to engage in high-quality math interactions in a low-effort, high-impact way.”

    Study participants included 587 first-grade students and their parents. Families were given an iPad installed with a version of the Bedtime Math app, with which parents and their children read stories and answer questions involving math, including topics like counting, shapes and problem-solving. A control group received a reading app that had similar stories without the math content and questions related to reading comprehension instead. Children's math achievement was assessed at the beginning and end of the school year. Parents completed a questionnaire about their nervousness with math.

    The more times parents and children in the math group used the app, the higher children's achievement on a math assessment at the end of the school year. Indeed, children who frequently used the math app with their parents outperformed similar students in the reading group in math achievement at year's end.

    Scientists have found that human eyes are more likely to be damaged by UV rays (紫外线) while skiing in the snow-covered areas than sitting on the beach, according to a report by the UK newspaper The Telegraph.

    The researchers at Kanazawa Medical University, Japan and American company Johnson conducted the study together. They looked at the effects of light reflection on newly fallen snow on a ski trail (a rough path) in Ishikawa District, northern Japan. They compared the results with the levels of UV rays on a sand beach in southern Japan's Okinawa District They found that on the beach, eyes are exposed to a daily 260 kilojoules (千焦耳) of UV a square meter compared to 658 kilojoules in snow-covered areas. The findings are supported by the Japan Meteorological Agency. According to the agency, the reflection rate of UV light on beaches is often between 10 and 25 percent, compared to 80 percent in lie new snow areas. The amount of light increased 4 percent with a 300-meter rise in height.

    Most of us know that UV rays can harm the skin. That's why we wear sunscreen on our skin before we get out in the suit. But many of us may not realize that UV rays are also harmful to the eyes.

    If your eyes are exposed to large amounts of UV radiation over a short period of time. You may experience a kind of sunburn of the eye, which is harmful. Your eyes will become red and feel a strange feeling. They may be sensitive to light. Fortunately, this is usually temporary and seldom causes permanent damage to the eyes.

    Long-term exposure to UV radiation, however, can be more serious. Scientific studies and researches have shown that exposure to small amounts of UV radiation over a period of many years increases chance of eye damage, which could lead to total blindness.

    As long as people have been telling stories, crones(丑陋的老太婆)have been scaring the wits out of children. "Nags(怨妇),witches, evil stepmothers, cannibals(食人妇). It's quite dreadful," says Maria Tatar, who teaches a course on folklore and mythology at Harvard. "But old women are also powerful—they're often the ones who can work magic." In the Disney film Snow White, there's a scene in which the beautiful, charming, wicked queen turns into an old hag and poisons Snow White so she'll sleep forever. The old lady in Hansel and Gretel wants to roast children in her oven and the witch in The Little Mermaid cuts out Ariel's tongue.

    Tatar says old women villains (恶人)are especially scary because，historically, the most powerful person in a child's life was the mother. "Children do have a way of splitting the mother figure into...the evil mother—who's always making rules and regulations, policing your behavior, getting angry at you—and then the kind mother—the one who is giving and protects you, makes sure that you survive."

    Veronique Tadjo, a writer who grew up in the Ivory Coast, thinks there's a fear of female power in general. She says a common figure in African folk tales is the old witch who destroys people's souls. Still, they're not all bitter and evil hags. Elderly women in folk tales often use their knowledge and experience of the world to guide the troubled protagonist(主人公). Tadjo points to the Kenyan story Marwe In The Underworld about a girl who commits suicide by drowning herself and enters the Land of the Dead where she meets an old woman. "That old woman teaches her quite a lot of things," Tadjo says. "And also, when Marwe starts longing for the world of the living, she helps her go back to the surface with a lot of riches. And we understand that Marwe has been rewarded for her goodness." In other words: Do your chores and you'll be rewarded. The point of these ancient tales, no matter what continent they come from, may have been to scare children into behaving.

    Perhaps the scariest old woman character—the ugly Baba Yaga—comes from Russia. She's bony with a hooked nose and long, iron teeth. Her hut(小屋)stands on chicken legs and she kidnaps children and eats them. Safe to say Baba Yaga has been making Eastern European children sleepless for centuries. In one interpretation, a mean stepmother sends the young girl Vasilisa to Baba Yaga's hut in the woods to get a candle. The girl is sure she's being sent to her death. Baba Yaga forces her to cook and clean, and Vasilisa does everything she's told. In the end, the old crone gives her what she needs and sends her home. "You see this kind of double face of the hag,"Maria Tatar says. "On the one hand: aggressive, threatening. And on the other hand: sometimes to make sure that there is a happily ever after."

    There's that power again. In Japanese folklore, the Yama Uba(山姥)is an equally ambiguous old woman. She's a mountain witch who, like Baba Yaga, lures people into her hut and eats them. But she'll also help a lost traveler. Noriko Reider is a professor at Miami University of Ohio who's done extensive research on Yama Uba stories. "She brings fortune and happiness," Reider says. "She can also bring death and destruction for those who are not very good."

    According to Cuban-American writer Alma Flor Ada, in Hispanic(拉美地区的)culture old women are multi-talented. Ada is co-author of Tales Our Grandmas Told, which includes a story about Caliph's son who becomes seriously ill. After "all of the best physicians in the land" fail to cure him, Caliph sends his messengers searching for help. Then one morning, an old woman arrives with this advice: To get well, the prince must wear the overcoat of a man who is truly happy. And of course it works.

    It was May 23, 2016. Arnot, the 32-year-old mountain guide, reached the top of Everest without the use of oxygen (O2) equipment. It was achieved after seven years, three previous attempts, and fourteen straight hours of climbing.

After 15 minutes at the top, Arnot began her descent (下坡). Eight hours later, she reached the camp at 7, 600 meters and became the first American woman-and only the seventh woman ever—to successfully reach Mount Everest without oxygen equipment.

    "There are so many reasons for her impressive achievement, especially the physical and emotional efforts that she has put forth over the years to make this happen," says the professional climber and photographer Richards, "The mental courage that it requires is something very few people have."

    Arnot didn't start climbing until she was 19 years old. Money was tight in her family, and climbing mountains never occurred in her mind. After graduating from college, Arnot was invited by her friend to climb a mountain. "It totally changed my life," says Arnot. I always know that if you want something, you can achieve it, but knowing what you want is a whole different thing," she says. "I am athletic but not competitive. After my first climbing, I knew immediately that mountains are what I want—as that is where I felt home for the first time in my life."

    After that first climb, she devoted herself to learning how to climb and move through mountain. It was during her second trip to Everest in 2009 that she first set her sights on a no-oxygen attempt. However, while hiking into Everest Base Camp that year, she hurt her leg and wasn't able to climb without oxygen. In 2013 she nearly made it to the top, but was forced to take oxygen at 8,504 meters while helping another climber.

    When Arnot finally stood at the top Everest, she called her best friend, "I reached the top and I'm not using any oxygen." Then, tears began to stream down from her eyes. So much of Arnot's life has been about pushing the limits of her abilities, and in this case, she's also pushed up against the outer limits of the human spirit.

Benjamin West, the father of American painting, showed his talent for art when he was only six years of age. But he did not know about brushes before a visitor told him he needed one. In those days, a brush was made from camel's hair. There were no camels nearby. Benjamin decided that cat hair would work instead. He cut some fur from the family cat to make a brush.

The brush did not last long. Soon Benjamin needed more fur. Before long, the cat began to look ragged(蓬乱). His father said that the cat must be sick. Benjamin was forced to admit what he had been doing.

The cat's lot was about to improve. That year, one of Benjamin's cousins, Mr. Pennington, came to visit. He was impressed with Benjamin's drawings. When he went home, he sent Benjamin a box of paint and some brushes. He also sent six engravings (版画) by an artist. These were the first pictures and first real paint and brushes Benjamin had ever seen.

In 1747, when Benjamin was nine years old, Mr. Pennington returned for another visit. He was amazed at what Benjamin had done with his gift. He asked Benjamin's parents if he might take the boy back to Philadelphia for a visit.

In the city, Mr. Pennington gave Benjamin materials for creating oil paintings. The boy began a landscape (风景) painting. William Williams, a well-known painter, came to see him work. Williams was impressed with Benjamin and gave him two classic books on painting to take home. The books were long and dull. Benjamin could read only a little, having been a poor student. But he later said, "Those two books were my companions by day, and under my pillow at night." While it is likely that he understood very little of the books, they were his introduction to classical paintings. The nine-year-old boy decided then that he would be an artist.