The more hours that young children spend in child care, the more likely they are to turn out aggressive and disobedient by the time they are in kindergarten, according to the largest study of child care and development ever conducted. Researchers said this correlation (相关性) held true regardless of whether the children came from rich or poor homes, were looked after by a relative or at a center, and whether they were girls or boys.

    What is uncertain, however, is whether the child care actually causes the problem or whether children likely to turn out aggressive happen to be those who spend more hours in child care. It also remains unclear whether reducing the amount of time in child care will reduce the risk that a child will turn into a mean person. What's more, quality child care is associated with increased skills in intellectual ability such as language and memory, leading some academics to suggest that child care turns out children who are “smart and naughty”.

    The government-sponsored research, which has tracked more than 1,300 children at 10 sites across the country since 1991, is bound to cause the debate over child care again: How should people balance work and family? And how should parents, especially mothers. Resolve the demands that are placed on them to be both breadwinners and supermoms?

    That debate was already on display at a news briefing yesterday, where researchers themselves had different opinions about the data and its implications (含义). “There is a constant relationship between time in care and problem behavior, especially those involving aggression and behavior,” said Jay Belsky of Birkbeck College in London, one of the lead investigators of the study who has previously annoyed women's groups because of his criticisms of child care. “On behalf of fathers or mothers?” interrupted Sarah Friedman, a developmental psychologist at the National Institute of Child Health and Human Development (NICHD) and one of the other lead scientists on the study. “On behalf of parents and families,” responded Belsky.

    “NICHD is not willing to get into policy recommendations.” said Friedman, contradicting her colleague. “There are other possibilities that can be entertained. Yes it is a quick solution—more hours in child care is associated with more problems. The easy solution is to cut the number of hours but that may have implications for the family that may not be beneficial for the development of the children in terms of economics.” In an interview after the briefing, Friedman said that asking parents to work fewer hours and spend more time with their children usually meant a loss of family income, which adversely(不利地) affects children.

    Scientists said that the study was highly reliable. But the researchers said they had no idea whether the behavioral difficulties persisted as the children moved to higher grades.

    Your next car might drive itself. After years of trials on city streets, driverless vehicles are now nearing the live phase. Last moth, a driverless bus began carrying passengers through Lyon, France, Most in the automobile industry think self-driving vehicles will be on the road by 2020 or before.

    Driverless cars will at first be huddled with human-driven cars. But the first places where they will become dominant（统治的）are dense urban areas — precisely the spots most damaged by the automobile age. Many advanced cities are already reducing the role of human-driven cargo. Driverless cars will quicken that process and will bring us enormous benefits.

    Driverless cars will reduce accidents by around 90 percent. That's big—the annual death toll on the world's roads is about 1.2 million a year. Pollution and carbon emissions will drop, because urban driverless cars will be electric. The old, otherwise they would stay at home most of the time and the disabled and teenagers will suddenly gain mobility.

    On the other hand, driverless cars will bring catastrophe. The best thing about the automobile age was that it employed tens of millions of people to make, market, insure and drive vehicles. Over the next 20 years, the mostly low-skilled men who now drive trucks, taxis and buses will see their jobs reduced. Carmakers are especially scared. The few cars of the future might be made by tech companies such as Apple, Baidu and Google. Imaging the impact on Germany, where the automotive sector is the largest industry.

    Dramatic change is coming, and driverless cars could arrive by 2020. But governments have barely begun thinking about it. Only 6 percent of the biggest US cities have factored them into their long-term planning.

    A decade ago anyone hardly saw the Smartphone coming. It has bought an epidemic of mass addiction. Let's hope we do a better job of handling the driverless car.

    In the latest romance-drama, Descendants of the Sun (《太阳的后裔》), a handsome soldier Yoo Shi-jin(柳时镇) (Song Joong-ki)(宋仲基) meets the pretty doctor Kang Mo-yeon(姜暮烟) (Song Hye-kyo)(宋慧乔) in a hospital, and he doesn't hesitate to hit on her.

    The dialogue, which takes place early in the first episode(集), immediately indicates that this is no ordinary South Korean drama. There's no family feud (不睦), or love tangles, or guesses and misunderstandings. The 16-episode show is set in the fictional war-torn country of Uruk(乌鲁克). Song Joong-ki is the leader of a special warfare command unit, while Song Hye-kyo plays a doctor who works for a humanitarian medical organization. Both are sent in the midst of disaster and disease as part of their work with UN peacekeeping troops. Both know and show clearly what they want and what they hate.

    But what stands out the most are Song's skills as a pick-up artist(撩妹技能).

    Boldness and creativity are the key weapons in his arsenal. When Kang invites Yoo to drink wine with her, Yoo, who is not allowed to drink alcohol as a soldier, says, ＂There is a way.＂ before kissing her. Forget about the ＂eighth-episode rule＂ . This kiss happens in the fourth.

    Humor also does the trick. On their first date in a cinema, Yoo says, ＂This is the most exciting moment of my life. The moment I am with a beautiful woman before the theater lights go out.＂ When Kang tries to give Yoo a hard time, Yoo jokes, ＂I mistook you for a beautiful woman because it's dark.＂

    And actor Song Joong-ki, who just came back from two years of military service last May, makes sure he delivers his pick-up lines just right.

    ＂In Deep Rooted Tree (《树大根深》) and The Innocent Man (《善良的男人》), he [Song Joong-ki] showed he had the steel to play fearless and heartless men — that he could be taken seriously as an actor, despite his pretty face. In Descendants, he hits the emotional core of every scene, whether he has to be bold and amorous, guarded and mysterious, or sad,＂said critic Foong Woei Wan in The Straits Times.

    It is quite reasonable to blame traffic jams, the cost of gas and the great speed of modern life, but manners on the road are becoming horrible. Everybody knows that the nicest men would become fierce tigers behind the wheel. It is all right to have a tiger in a cage, but to have one in the driver's seat is another matter altogether.

    Road politeness is not only good manners, but good sense too. It takes the most cool-headed drivers great patience to give up the desire to beat back when forced to face rude driving．On the other hand, a little politeness goes a long way towards reducing the possibility of quarrelling and fighting. A friendly nod or a wave of thanks in answer to an act of politeness helps to create an atmosphere of good will and calm so necessary in modern traffic condition. But such behaviors of politeness are by no means enough. Many drivers nowadays don't even seem able to recognize politeness when they see it.

    However, misplaced politeness can also be dangerous. Typical examples are the driver who waves a child crossing the street at a wrong place into the path of oncoming cars that may be not able to stop in time. The same goes for encouraging old ladies to cross the road wherever and whenever they want to. It always amazes me that the highways are not covered with the dead bodies of these grannies (奶奶).

    An experienced driver, whose manners are faultless, told me it would help if drivers learnt to correctly join in traffic stream without causing total blockages that give rise to unpleasant feelings. Unfortunately, modern drivers can't even learn to drive. Years ago, experts warned us that the fast increase of the car ownership would demand more give-and-take from all road users. It is high time for all of us to take this message to heart.

    Last summer I sat at a long picnic table near a breathtaking mountain. While the parents were eating dinner, the kids ran up a trail in search of a secret fort. Twenty minutes later one excited little boy, James, interrupted the adult conversation.

    “Mom, Mom, you can't believe what we found!”

    Lovingly, his mother smiled and whispered, “I can't wait to hear, James, but grown-ups are talking, and there will be a pause in the conversation. Please wait for the pause.”

    On my other side, another boy came running up to his mother with equal enthusiasm.

    “Mom, Mom, we had so much fun—”

    “I am talking! Don't interrupt,” she said.

    “But, Mom—”

    “Be quiet! Can't you see that I am talking?”

    “But Mom we found the—”

    “Shut up, Steve!” she yelled.

    My heart sank. I knew what was coming. James, on my right, patiently waited for the pause, enthusiasm still alive and well. Steve, on my left, walked away from the table, looking shamed, carrying with him stories of secret forts never to be shared.

    What markedly different messages to the child! “Wait for the pause” versus “Shut up” gets incorporated (包含)so differently into a child's developing sense of self.

    Harsh(刺耳的) words have bad effects. That's why I want you to promise to delete the phrases “Shame on you” or “You should be ashamed” from your vocabulary. I have seen countless patients whose parents' thoughtless words echoed in their heads and chipped(消除) away at their self-worth, even decades later.

    So we have to discipline ourselves to make our instructions constructive. One great tool is to look for positive behavior to reinforce. Don't ignore the things that your kids are doing right. Thank your children. Tell them that you noticed how they waited patiently or cleared their plate without being asked. Chances are that they will do it again. Let them feel noticed, appreciated, and valued. There's no better way to shape behavior.

    Three miles is short by car, but when the three miles consists of an old wooden fence on a cattle farm that requires a fresh coat of paint, it's not a short distance any more. For the final week of summer heading into my first year of college, painting this fence was a disaster for me. At first it seemed like the most boring way to spend the last week of my wonderful freedom from school, but it actually turned out to be something intriguing.

    Luckily, I wasn't alone in this task; I got the help of Rob, the farm manager. When two people were stuck under the sun of August in the middle of rural Kentucky for ten hours a day, there wasn't much to do to help pass the time. Standing in front of this fence was the last thing on Earth I wanted to do. I worked with Rob all these days, spending over hours with him with nothing to do but a boring task, and all we had for amusement was conversation. In a society filled with constant entertainment, this was a huge contrast.

    It started out simply, and we talked about the weather, sports, and how annoying it was to get the fence painted. As the week progressed, so did our topics of discussion. From family and funny childhood stories to our hobbies and dreams, we began to know more about each other. We shared personal stories with each other, little pieces of our past and ourselves. I had spent plenty of time with people whether it was about sporting events, movies, or concerts, but never had I spent so much time with one person with absolutely nothing to break the silence. It was uncomfortable at first, but things changed.

    Sometimes we tried to keep ourselves busy, entertained, or from getting bored. There is a deeper connection you get with people when all you're doing is talking. For a moment, you get an inside look into their mind, heart and soul. This is what humans are good at—sharing themselves. Whether we realize it or not, this is happening all the time all around us.