Throughout the history of the arts, the nature of creativity has remained constant to artists. No matter what objects they select, artists are to bring forth new forces and forms that cause change—to find poetry where no one has ever seen or experienced it before.

    Landscape is another unchanging element (元素) of art. It can be found from ancient times through the 17th­century Dutch painters to the 19th­century romanticists (浪漫主义艺术家 ) and impressionists. In the 1970s Alfred Leslie, one of the new American realists, continued this practice. Leslie sought out the same place where Thomas Cole, a romanticist, had produced paintings of the same scene a century and a half before. Unlike Cole who insists on a feeling of loneliness and the idea of finding peace in nature, Leslie paints what he actually sees. In his paintings, there is no particular change in emotions and he includes ordinary things like the highway in the background. He also takes advantage of the latest developments of color photography to help both the eyes and the memory when he improves his painting back in his workroom.

Besides, all art begs the age­old question: What is real? Each generation of artists has shown their understanding of reality in one form or another. The impressionists saw reality in brief emotional effects, the realists in everyday subjects and in forest scenes, and the Cro­Magnon cave people in their naturalistic drawings of the animals in the ancient forests. To sum up, understanding reality is a necessary struggle for artists of all periods.

    Over thousands of years the function of the arts has remained relatively constant. Past or present, Eastern or Western, the arts are a basic part of our immediate experience. Many and different are the faces of art, and together they express the basic need and hope of human beings.

    I've learned that you have to make the choice if you want to get anywhere. If you just let other people decide what is going to happen for you, then all your goals and dreams may never be achieved.

    Everyone always says that studying abroad in college can change your life. I made the decision to experience it for myself during my junior year. I chose to study in the Dominican Republic. As it got closer to the deadline, an advisor told me I had received a scholarship from an alumni (校友) family foundation.

    During my first semester in the country I fell in love. I was becoming bilingual (双语的) but also learning so much about a new culture. I had begun working with a local grassroots organization, taking part in a project supporting an underdeveloped community just outside the city. My main role was to become aware of the issues facing populations such as these and support community education. I was in no way ready to leave this new life. I felt as if I needed more time to get what I wanted.

    As the next semester began, I realized again that I needed to take a chance. I got involved with a local boarding school for girls living in poverty. I first approached the head of the school to volunteer to teach music classes, asking for money from my college church. I could have never predicted the results of this small action. Another volunteer and I were able to put together a benefit (义演) to show off what the students had learned. We invited community members, friends and other students from local universities to support the girls. We also sold art that the students themselves had created to increase the funding (资助) of the arts program. I felt good when I left, knowing that I had laid the foundation for a good cause and bettered the lives of young girls.

    There will always be people that think they know what is best for you, but you ultimately know what you want in life. My time in the Dominican Republic changed my life by giving me the realization of how fortunate I am and the fact that there is always a chance to give back. You have to go after anything and everything you desire or there may be a missed opportunity. My trip to Santo Domingo taught me to take advantage of new possibilities.

    We want our children to succeed, in school and, perhaps even more importantly, in life. But the paradox(悖论) is that our children can only truly succeed if they first learn how to fail. Consider the finding that world-class figure skaters fall over more often in practice than low-level figure skaters. At first sight this seems contradictory. Why are the really good skaters falling over the most?

    The reason is actually quite simple. Top skaters are constantly challenging themselves in practice, attempting jumps that stretch their limitations. This is why they fall over so often, but it is precisely why they learn so fast. Lower-level skaters have a quite different approach. They are always attempting jumps they can already do very easily, remaining within their comfort zone. This is why they don't fall over. In a superficial sense, they look successful, because they are always on their feet. The truth, however, is that by never failing, they never progress.

    What is true of skating is also true of life. James Dyson worked through 5,126 failed prototypes(原型) for his dual cyclone vacuum before coining up with the design that made his fortune. These failures were essential to the pathway of learning. As Dyson put it: “You can't develop new technology unless you test new ideas and learn when things go wrong. Failure is essential to invention.”

    In healthcare, however, things are very different. Clinicians don't like to admit to failure, partly because they have healthy egos(自我)(particularly the senior doctors) and partly because they fear litigation(诉讼). The consequence is that instead of learning from failure, healthcare often covers up failure. The direct consequence is that the same mistakes are repeated. According to the Journal of Patient Safety, 400,000 people die every year in American hospitals alone due to preventable error. Until healthcare learns to respond positively to failure, things will not improve.

    But let us return to children. One of the major mistakes in education in the 1970s was the attempt to equip children with confidence by giving them lots of successes （setting the bar very low）. The consequence was that the ego of kids became bound up with success, and they became unable to take risks and collapsed as soon as they hit a proper challenge.

    We need to flip(翻转) this approach. In a complex world, failure is inevitable. It is those individuals and institutions that have the flexibility to face up to failure, learn the lessons and adapt which eventually excel(突出).

    The past two decades have seen astronomers' catalogue of planets expand over two hundred times, as new techniques and better telescopes have found more than 2,000 of them orbiting stars other than the sun. But in the solar system itself, the list of planets has actually shrunk, Pluto（冥王星）having been downgraded from that status in 2006. The number of the sun's planetary companions has thus fallen from nine to eight.

    Now, a pair of astronomers from the California Institute of Technology think they have evidence that will restore the sun's record to its previous value. Their analysis of objects orbiting in the Kuiper Belt（柯伊伯带）, a ring of frozen asteroids（小行星）that circle beyond the orbit of Neptune (and of which Pluto is now regarded as the largest member), suggests to them that something about ten times as massive as Earth has changed those orbits. If you knew where to look, this planet-sized object would be visible through a suitable telescope. And Konstanin Batygin and Michael Brown believe they do know.

As they write in the Astronomical journal, they have analyzed the orbits of Kuiper Belt objects and found six that behave in a peculiar way. As the diagram shows, the points of closest approach of these objects to the sun, known as their perihelia（近日点）, almost coincide. Moreover, these perihelia all lie near the ecliptic（黄道）—the plane of Earth's orbit and also, approximately, that of the other planets—while the objects' orbits are all angled at 30° below the ecliptic. The chance of all this being a coincidence, the two researchers estimate, is about seven in 100,000. If it is not a coincidence, it suggests the six objects have been guided into their orbits by the gravitational intervention of something much larger.

    A computer analysis Dr Batygin and Dr Brown performed suggests this something is a planet weighing 5-15 times as much as Earth, whose perihelion is on the opposite side of the sun from the cluster, and which thus orbits mainly on the other side of the solar system from the objects its orbit has affected. This planet's perihelion would be 200 times farther from the sun than Earth's, and the far end of its orbit might be as much as six times that distance away. This gives a search zone, and Dr Batygin and Dr Brown are using Subaru, a Japanese telescope, to perform that search.

    Given other demands on Subaru's time, it might take five years for this search to find (or not find) the hypothetical planet. But looking at some existing data from. The Widefield Infrared Survey Explore, a satellite, might also show it, if it is there to be seen.

    Ironically, it was Dr Brown as much as anyone who was responsible for Pluto's downgrading, for he discovered Eris, an object almost as big as Pluto, in 2005.

    That discovery did much to damage Pluto's planetary proof. By his own admission, he was skeptical that the anomalies he and Dr Batygin have investigated actually would point to the existence of a replacement ninth planet. He is a skeptic no longer. Whether he is actually right may soon become apparent.

    Languages have been coming and going for thousands of years, but in recent times there has been less coming and a lot more going. When the world was still populated by hunter-gatherers , small tightly knit (联系) groups developed their own patterns of speech independent of each other. Some language experts believe that 10,000 years ago, when the world had just five to ten million people, they spoke perhaps 1,200 languages between them.

    Soon afterwards, many of those people started settling down to become farmers, and their languages too became more settled and fewer in number. In recent centuries, trade, industrialization, the development of the nation-state and the spread of universal compulsory education, especially globalization and better communications in the past few decades, all have caused many languages to disappear, and dominant languages such as English, Spanish and Chinese are increasingly taking over.

    At present, the world has about 6,800 languages. The distribution of these languages is hugely uneven. The general rule is that mild zones have relatively few languages, often spoken by many people, while hot, wet zones have lots, often spoken by small numbers. Europe has only around 200 languages; the Americas about 1,000; Africa 2,400; and Asia and the Pacific perhaps 3200, of which Papua New Guinea alone accounts for well over 800. The median number (中位数) of speakers is a mere 6,000, which means that half the world's languages are spoken by fewer people than that.

    Already well over 400 of the total of 6,800 languages are close to extinction (消亡), with only a few elderly speakers left. Pick, at random, Busum in Cameroon (eight remaining Speaker), Chiapaneco in Mexico (150), Lipan Apache in the United States (two or three) or Wadjigu in Australia (one, with a question-mark) none of these seems to have much chance of survival.

    On the way to my company, I was driving behind a small truck. I was a few minutes late and watching the two men ahead of me talking in that slow truck made me angry.

    The light turned green, but the truck was still moving very slowly. I became impatient, so I turned right to go past it. Suddenly, a new blue Chevy Silverado was rushing by. I tried to stop, but my car hit the side of the Chevy.

    "Pow!" I heard a big noise and then I realized that an accident happened. For a moment, just a moment... I asked if I was OK, and honestly, I was waiting for people to come over and help me. Those thoughts didn't last long, as the answer came into my mind that the air bag had saved me. Luckily, I was still alive.

    Slowly I opened the door. The warm, bright morning sunlight hit my face and I felt better. I saw the Chevy Silverado and I ran over to check if the driver in it was injured. "Are you OK？"I shouted loudly through the window. His head was down, eyes closed, and he didn't answer me.

    At that moment, I thought I was looking at a dead man. Full of fear, I shouted again, and knocked at the window heavily once more. His eyes started to open, and he slowly shook his head, "Yes."

    Once again, I said to myself, "How lucky I am!"