We are surrounded by mixed messages about mistakes: we're told we earn by making them, but we work hard to avoid them. So the result is that most of us know that we are going to make mistakes, but deep down, we feel we shouldn't.

    Experiments with schoolchildren who did well on a given test show that those who were praised for being smart and then offered a more challenging or less challenging task afterward usually chose the easier one. On the other hand, children praised for trying hard-rather than being smart-far more often selected the more difficult task.

    If we try hard to avoid mistakes, we aren't open to getting the information we need in order to do better. In a writing study, experiments showed that those who are so scared to make mistakes perform worse in writing tasks than those who aren't as worried about being perfect. They fear receiving any kind of negative feedback, so they don't learn where they went wrong and how to get better.

    We don't just learn more when we're open to mistakes, we learn deeper. Research tells us that if we're only concerned about getting the right answer, we don't always learn the underlying concepts that help us truly understand whatever we're trying to figure out. Mistakes

need to be seen not as a failure to learn, but as a guide to what still needs to be learned. As Thomas Edison said, “I am not discouraged, because every abandoned wrong attempt is another step forward. "

    Furthermore, we often make mistakes because we try new things-we wander away from accepted paths. Teflon, penicillin-these are examples of great discoveries made by mistake. Take a page from Albert Einstein, who said, "Anyone who has never made a mistake has never tried anything new. "

    A few years ago, a company called Space Marketing came up with a plan to send a mile–long advertisement into space. To advertising agencies (机构), it would have been “a dream come true”. However, advertising standards agencies finally decided not to allow Space Marketing to go ahead with their plans and they were forced to give them up.

    Space may indeed be the final place for advertisers, because on Earth we are already surrounded by advertising wherever we are and whatever we are doing. Apart from the obvious adverts that we see every day on TV, and in newspapers and magazines, there is a whole 'other world' of advertising messages for our attention. There are ads that we see on the side of the bus we catch to work, for example. And what about the logos (商标) we see on the clothing of the people we walk past in the streets?

    Most of the time, we are probably not even aware of (意识到的) these less obvious advertising methods, but that doesn't mean that they don't work. Take 'product placement', for example. You are in a cinema, watching the latest Hollywood movie. Look carefully at the make of car your favorite actor is driving. And what about his watch? Can you see what brand it is? Chances are, you can, and the company that owns the brand is likely to have paid thousands for it to appear in the film.

    So, whether Space Marketing finally succeeds in sending ads into space or not is perhaps less important than it might seem. This would not change a thing. Our everyday lives are already strongly influenced by advertising whether we realize it or not.

    People born in winter are more likely to suffer mental health disorders, according to a recent study carried out by researchers at Vanderbilt University in Tennessee.

    Researchers raised baby mice from birth to weaning (断奶) in either “summer” light cycles of 16 hours of light and 8 hours of dark or “winter” cycles of 8 hours of light and 16 hours of dark. A third group experienced 12 hours of light and 12 hours of dark a day.

    Then half the winter mice stayed in a winter cycle, while half switched to a summer schedule. The summer mice were similarly split. The mice raised in equal periods of light and dark were split into three groups, one of which stayed on the 12­hour schedule, one of which joined the winter group, and one of which joined the summer group.

    After 28 days, it turns out the summer­born mice behaved the same whether they stayed on the summer cycle or switched to winter. But among the winter­born mice, those that stayed in winter kept their previous schedule, while those that switched to summer stayed active for an extra hour and a half, which indicates that mice born and weaned in a winter light cycle showed dramatic disruptions（破坏） in their biological clocks.

    The finding is the first of its kind in mammals, and it could explain why people born in winter are at higher risk for mental health disorders.

    “We know that the biological clock regulates(管理) mood in humans,” said study researcher McMahon. “If the mechanism (机制) similar to the one that we found in mice operates in humans, then it could not only have an effect on a number of behavioral disorders, but also have a more general effect on personality.”

    In many countries, authority is seldom questioned, either because it is highly respected, or because it is feared. Because rank has been important in certain societies for a long time, people have been trained never to question those in authority. For example, children are not expected to question their teachers in school. It may be considered improper for young businessmen to suggest ideas that differ from those of older, more experienced members of the business.

    In other countries, including America, children are trained to question and search for answers. When a child asks a question, he will often be told to go to the library and find the answer for himself. By the time students reach the age of 14 or 15, they may be developing exciting new ideas in all fields of science and arts. To encourage such creativity, there are many national prizes offered to students every year for their scientific discoveries and artistic accomplishments.

    This interest in questioning and searching may be considered by some people as bad for young people's manners, that young people lack respect for authority. This impression may be created when visitors notice young Americans asking questions and arguing with older people. However, this is because many Americans have a different attitude toward authority than may exist in other areas of the world. In a work or business situation, ideas are freely and openly discussed and argued. It is important to remember that it is the person's ideas that are being questioned, not the individual himself. The two are quite separate. The purpose of the searching, questioning, and arguing is to find the facts in a particular situation, and therefore a solution, so that the work of the business can progress in the most effective manner possible.

    As was mentioned earlier, you may notice the same questioning in social conversations. Although some individual may think that Americans are rude because of the direct manner with people, they are merely trying to learn more about your ideas.

    PHILADELPHIA-The thumb of a Terracotta Warrior was stolen by a member of the public in Philadelphia, where the statue is on display. The cultural relics authority of Northwest China's Shaanxi province will send conservationists（保护工作者）to repair a Terracotta Warrior that had its thumb stolen by a member of the public while on display at a Philadelphia museum.

    US departments that are involved should guarantee the safety of the relics on display, and parties concerned will be held legally accountable, the provincial cultural heritage department said on Sunday.

The statue of a cavalryman（骑）, which dates back to at least 209 BC, is one of10

    Chinese Terracotta Warrior statues now on display at the Franklin Institute in Pennsylvania.

    Since 2009, Wang's team has restored more than 100 of the Terracotta Warriors. According to the Stolen（Lost）Cultural Relics Information Publishing Platform of China, which went online late last year, up to 60 percent of cases of theft have occurred in museums and historical relics institutions. However, most cases occurred in the 1980s and 1990s. As security technology developed in recent years, it has become more difficult to steal a cultural relic from a museum in China, according to the publishing platform.

    Chen Shiqu, deputy head of the Criminal Investigation Department at the Ministry of Public Security, said during a previous interview that the prices of cultural relics have risen in recent years, leading to more thefts by using upgraded technology.

    "Some criminals are equipped with high-tech tools that can make a tunnel very quickly to steal and transport the cultural relics," he said.  "China will continue to complete the mechanism for fighting against and preventing relies thefts. We will crack down on（打击）the whole market chain, including the trading of the relics and organized thefts. All involved offenders will face criminal liability."

    Meanwhile, US authorities said Michael Rohans, 24, from the US state of Delaware was arrested in connection with the theft and has been released on $15, C00 bail（保释金）, on the condition that he surrender his passport, consent to drug testing and refrain from leaving the country before trial. Museum staff members noticed the missing thumb on Jan 8, and a special agent from the FBI's Art Crime Team tracked down Rohana days later.