【推荐1】Researchers in China and the United States have developed a new cataract(白内障)treatment with cells that has restored vision in babies in a trial and may eventually be used in adults.

The treatment-by doctors and staff members at the University of California, San Diego School of Medicine and Sichuan and Sun Yat-sen universities in China-was published in March 9 edition of the scientific journal Nature.

A cataract is a clouding of the normally clear lens(晶体)of an eye. Typical cataract operation involves the removal of the cloudy lens and the insertion of an artificial one. The new operation has been tested in animals and during a small, human trial. It resulted in fewer complications(并发症)than the current harmful operation, and in regrown lenses with superior visual function in all 12 of the baby cataract patients who received the procedure.

A congenital cataract-lens clouding that occurs at birth or shortly after- is important cause of blindness in children. In the new research, K and Zhang, head of ophthalmic genetics at US San Diego’s Shiley Eye Institute, and   his colleagues relied on the regrown potential of endogenous(同源的)stem cells.

According to Zhang, endogenous stem cells are different from other stem cells that are typically grown in a laboratory, transplanted into a patient, and can have risks of immune（免疫的）rejection, infection or cancers. Zhang told CBS News, “We invented a new operation to make a very small opening at the side of a cataractous lens bag, remove the cataract inside, allow the opening to heal, and promote potential lens stem cells to regrow an entirely new lens with vision.”

The human trial involved 12 babies under the age of 2 who were treated with the new method, while 25 babies received the standard operation care. The latter group experienced a higher incidence of post-operation danger, early- onset eye high blood pressure and increased lens clouding. The scientists reported fewer complications and faster healing among the 12 babies who has the new procedure.

【推荐2】Peter Skyllberg, a Swedish man, was trapped in his car for two months, with temperatures reaching -30^oC, with no food or water, and yet he survived. The best explanation was that his vehicle created an “igloo (snow house) effect” and protected him from the extremely low temperatures and that his body would hibernate(冬眠) during this time.

Can humans get into a low-energy consumption state like a bear by reserving energy, and reducing body temperature? Chinese scientists are looking for the key to regulating body temperature.

Scientists have found the hypothalamus (下丘脑), an area in the central lower part of the brain, is responsible for regulating body temperature. Wang Hong, a brain scientist at the Shenzhen Institutes of Advanced Technology of the Chinese Academy of Sciences, led her team to mark the neurons (神经元) responsible for regulating body temperature in mice by means of a cutting-edge genetic biology technique. In the experiments, they injected (注射) drug into mice to make the body temperatures of the mice drop rom 37C to 27 in two hours. The team found the change in body temperature caused no harm to the health of the mice. “We don’t know if we can develop a drug that can control human body temperature. We still need a lot of study.” Wang said.

Chinese scientists are not alone in such research. Body-cooling techniques are being used in pioneering hospitals around the world. Dutch doctors are now using low temperatures for patients who have suffered brain injuries in accidents, According to doctors working in Florence, it may even help to save the brains of babies who are born suffering from severe epileptic fits (癫痫病发作).

【推荐3】For years, doctors have given blood to patients who need it to survive. These transfusions (输血) usually include giving red blood cells to patients.

Blood transfusions aren’t as simple as taking blood from one person and giving it to someone else. There’re several different blood types that don’t all mix well. If someone gets a transfusion of the wrong kind of blood, their body will reject the blood cells, causing problems. For the first time ever, scientists from the University of Bristol, Britain, are carrying out a new trail: testing red blood cells grown in a laboratory on human volunteers. The scientists have used stem cells (干细胞) from a blood sample to grow billions of brand new red blood cells.

This could be even better than a regular blood transfusion. For one thing they can be adjusted for people with different blood types. That’ll be extremely helpful for people with rare blood types. Also, a normal transfusion has red blood cells of all different ages, which means only a small part of them are brand new. The red blood cells grown in the lab are brand new, and this means they last longer and that patients will need fewer transfusions.

To test its safety, researchers have given a couple of teaspoons of the blood to two healthy people, both of whom seem to be doing just fine after the transfusions. In all, they’ll be tested on 10 people, and compared to normal transfusions. The new process doesn’t indicate that normal blood transfusions will disappear. Meanwhile, growing red blood cells in a lab is extremely expensive. And a lot of work and testing still need to be done. But if it’s successful, the process could make life much easier for patients who often need transfusions-even those with rare blood types.

【推荐1】If spending is a measure of what matters, then the people of the developing world place a high value on brains. While private spending on education has not changed much in the rich world in the past ten years, in China and India it has more than doubled. Since brainpower is the primary generator of progress, this burst of enthusiasm for investing in private education is excellent news for the world. But not everybody is delighted. Because private education increases inequality, some governments are trying to stop its advance. That’s wrong: they should welcome it, and spread its benefits more widely.

① Education used to be provided by religious institutions or entrepreneurs. But when governments, starting in Prussia in the 18th century, got into the business of nation-building, they realized they could use education to shape young minds. As state systems grew, private schooling was left to the elite and the pious(虔诚的). Now it is enjoying popularity again, for several reasons. Incomes are rising, especially among the better off, at the same time as birth rates are falling. In China the former one-child policy means that six people---two parents and four grandparents---can pour money into educating a single child.

② All over the developing world, people want more or better education than governments provide. Where cities are growing at unmanageable speed, the private education is taking up the slack. In India the private education now educates nearly half of all children, in Pakistan more than a third, and in both countries the state education is shrinking. Even where the state does pretty well, as in East Asia, richer people still want better schooling for their children than the masses get. Thus, Vietnam, which has an outstanding state-school system for a poor country, measured by its performance in the OECD’s PISA test, also has the fastest-growing private education.

③ In most ways, this is an excellent thing, because the world is getting more and better schooling.

In rich countries, once the background and ability of the children who attend private schools are taken into account, their exams results are about the same as those in the state education. But in developing countries private schools are better---and much more efficient. A study of eight Indian states found that, in terms of learning outcomes per rupee, private schools were between 1.5 times and 29 times more cost-effective than state schools.

④ They tend to sort children by income, herding richer ones towards better schools that will enhance their already superior life chances. That is one reason why many governments are troubled by their rise.

Governments are right to worry about private education’s contribution to inequality, but they are wrong to discourage its growth. Governments should instead focus on improving the public education by mimicking(模仿) the private education’s virtues. Freedom from independent management is at the root of its superior performance and greater efficiency. Governments should therefore do their best to give school principals more freedom to innovate and to fire underperforming teachers.

To spread the benefit of private schools more widely, governments should work with them, paying for education through vouchers(代金券) which children can spend in private schools. And vouchers should be limited to students in non-selective schools that do not charge top-up fees; otherwise governments will find themselves helping the better off and increasing inequality.

The world faces plenty of problems. Governments should stop behaving as though private education were one of them. It will, rather, increase the chances of finding solutions.

Pretending you’re someone else can make you creative

One great irony(讽刺) about our collective fascination with creativity is that we tend to frame it in uncreative ways. That is to say, most of us marry creativity to our concept of self: We are either “creative” people or we aren’t，without much of a middle ground.

Pillay, a tech businessman and Harvard professor has spent a good part of his career destroying these ideas. Pillay believes that the key to unlocking your creative potential is to dismiss the conventional advice that urges you to “believe in yourself”. In fact, you should do the exact opposite: believe you are someone else.

In a recent column for Harvard Business Review, Pillay pointed to a 2016 study showing the impact of stereotypes(刻板印象)on one’s behavior. The authors, education psychologists Denis Dumas and Kevin Dunbar, divided their college­student subjects into three categories, instructing the members of one group to think of themselves as “eccentric(古怪的) poets” and the members of another to imagine they were “rigid librarians”(people in the third category, the control group, were left alone for this part). The researchers then presented participants with 10 ordinary objects，including a fork, a carrot, and a pair of pants, and asked them to come up with as many different uses as possible for each one. Those who were asked to imagine themselves as “eccentric poets” came up with the widest range of ideas for the objects, while those in the “rigid librarian” group had the fewest. Meanwhile, the researchers found only small differences in students’ creativity levels across academic majors—in fact, the physics majors inhabiting(寄生) the personas(伪装的外表) of “eccentric poets” came up with more ideas than the art majors did.

These results, write Dumas and Dunbar, suggest that creativity is not an individual quality, but a “malleable(可塑的) product of context and perspective.” Everyone can be creative, as long as they feel like creative people.

Pillay’s work takes this a step further: He argues that identifying yourself with creativity is less powerful than the creative act of imagining you’re somebody else. This exercise, which he calls “psychological halloweenism”， refers to the conscious action of inhabiting another persona—an inner costuming of the self. It works because it is an act of “conscious unfocus”, a way of positively stimulating the default mode(默认模式) network, a collection of brain regions that spring into action when you’re not focused on a specific task or thought.

Most of us spend too much time worrying about two things: How successful/unsuccessful we are, and how little we’re focusing on the task at hand. The former feeds the latter—an unfocused person is an unsuccessful one, we believe. Thus, we force ourselves into quiet areas, buy noise­canceling headphones, and hate ourselves for taking breaks.

What makes Pillay’s argument stand out is its healthy, forgiving realism: According to him, most people spend nearly half of their days in a state of “unfocus”. This doesn’t make us lazy people—it makes us human. The idea behind psychological halloweenism is: What if we stopped judging ourselves for our mental down time, and instead started using it? Putting this new idea on daydreaming means addressing two problems at once: You’re making yourself more creative, and you’re giving yourself permission to do something you’d otherwise feel guilty about. Imagining yourself in a new situation, or an entirely new identity, never felt so productive.

Title: Pretending you’re someone else can make you creative

【推荐3】British children used to play conkers (板栗游戏) in the autumn when the horse-chestnut trees started to drop their shiny brown nuts. They would select a suitable chestnut, drill a hole in it and thread it onto a string, then swing their conker at that of an opponent until one of them broke. But the game has fallen out of favour. Children spend less time outdoors and rarely have access to chestnut trees. Besides, many schools have banned conkers games, worried that they might cause injuries or nut allergies.

That sort of risk-averseness(规避风险) now spreads through every aspect of childhood. Playgrounds have all the excitement designed out of them to make them safe. Many governments, particularly in societies such as America, have tightened up their rules, requiring parents to supervise(监管) young children far more closely than in the past. Frank Furedi of the University of Kent, a critic on modern parenting, argues that allowing children to play unsupervised or leaving them at home alone is increasingly described as a symptom of irresponsible parenting.

In part, such increased caution is a response to the huge wave of changes. Large-scale urbanization, smaller and more mobile families, the move of women into the labor market and the digitization of many aspects of life have unavoidably changed the way that people bring up their children. There is little chance that any of these trends will be changed, so today's more intensive(精细化的) parenting style is likely to go on.

Such parenting practices now embraced by wealthy parents in many parts of the rich world, particularly in America, go far beyond an adjustment to changes in external conditions. They mean a strong bid to ensure that the advantages enjoyed by the parents’ generation are passed on to their children. Since success in life now turns mainly on education, such parents will do their best to provide their children with the schooling, the character training and the social skills that will secure access to the best universities and later the most attractive jobs.

To some extent that has always been the case. But there are more such parents now, and they are competing with each other for what economists call positional goods. This competition starts even before the children are born. The wealthy classes will take their time to select a suitable spouse and get married, and will start a family only when they feel ready for it.

Children from less advantaged backgrounds, by contrast, often appear before their parents are ready for them. In America 60% of births to single women under 30 are unplanned, and over 40% of children are born outside marriage. The result, certainly in America, has been to widen already massive social inequalities yet further.

All the evidence suggests that children from poorer backgrounds are at a disadvantage almost as soon as they are born. By the age of five or six they are far less “school-ready” than their better-off peers, so any attempts to help them catch up have to start long before they get to school. America has had some success with various schemes involving regular home visits by nurses or social workers to low-income families with new babies. It also has long experience with programmes for young children from poor families that combine support for parents with good-quality child care. Such programmes do seem to make a difference. Without extra effort, children from low-income families in most countries are much less likely than their better-off peers to attend preschool education, even though they are more likely to benefit from it. And data from the OECD’s PISA programme suggest that children need at least two years of preschool education to perform at their best when they are 15.

So the most promising way to ensure greater equality may be to make early-years education and care for more widely available and more affordable, as it is in the Nordics. Some governments are already rethinking their educational priorities, shifting some of their spending to the early years.

Most rich countries decided more than a century ago that free, compulsory education for all children was a worthwhile investment for society. There is now an argument for starting preschool education earlier, as some countries have already done. In the face of crushing new inequalities, a modern version of that approach is worth trying.

【推荐1】As far as we know batteries are playing an important role in our life.We couldn’t live without batteries.Why so? Batteries provide power for anything from small sensors to large systems. While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are much larger and heavier than the devices themselves. University of Missouri(MU) researchers are developing a nuclear energy source that is smaller, lighter and more efficient.

“To provide enough power, we need certain methods with high energy density(密度)”，said Jae Kwon, assistant professor of electrical and computer engineering at MU. “The radioisotope(放射性同位素) battery can provide power density that is much higher than chemical batteries.”

Kwon and his research team have been working on building a small nuclear battery, presently the size and thickness of a penny, intended to power various micro / nanoelectromechanreal systems (M/NEMS). Although nuclear batteries can cause concerns, Kwon said they are safe.

“People hear the word ‘nuclear’ and think of something very dangerous,” he said, “However, nuclear power sources have already been safely powering a variety of devices, such as pace-makers, space satellites and underwater systems.”

His new idea is not only in the battery’s size, but also in its semiconductor(半导体). Kwon’s battery uses a liquid semiconductor rather than a solid semiconductor.

“The key part of using a radioactive battery is that when you harvest the energy, part of the radiation energy can damage the lattice structure(晶体结构) of the solid semiconductor,”Kwon said,“By using a liquid semiconductor, we believe we can minimize that problem.”

Together with J. David Robertson, chemistry professor and associate director of the MU Research Reactor, Kwon is working to build and test the battery. In the future, they hope to increase the battery’s power, shrink its size and try with various other materials. Kwon said that battery could be thinner than the thickness of human hair.

【推荐2】Financial regulations in Britain have imposed a rather unusual rule on the bosses of big banks. Starting next year, any guaranteed bonus of top executives could be delayed 10 years if their banks are under investigation for wrongdoing. The main purpose of this “clawback” rule is to hold bankers responsible for harmful risk-taking and to restore public trust in financial institution. Yet officials also hope for a much larger benefit: more long-term decision-making not only by banks but also by all corporations, to build a stronger economy for future generations.

“Short-termism” or the desire for quick profits, has worsened in publicly traded companies, says the Bank of England’s top economist, Andrew Haldane. He quotes a giant of classical economies, Alfred Marshall, in describing this financial impatience as acting like “Children who pick the strawberries out of their pudding to eat them at once” rather than putting them aside to be eaten last.

The average time for holding a stock in both the United States and Britain, he notes, has dropped from seven years to seven months in recent decades. Transient(短期的) investors, who demand high quarterly profits from companies, can hold back a firm’s efforts to invest in long-term research or to build up customer loyalty. This has been called “quarterly capitalism”.

In addition, new digital technologies have allowed more rapid trading of equities( 股 票 ), quicker use of information, and thus shortens attention spans in financial markets. “There seems to be an advantage of short-term thinking at the expense of long-term investing,” said Commissioner Daniel Gallagher of the US Securities and Exchange Commission in speech this week.

In the US, the Sarbanes-Oxley Act of 2002 has pushed most public companies to delay performance bonuses for senior executives by about a year, slightly helping reduce “short-termism.” In its latest survey of CEO pay, The Wall Street Journal finds that “a substantial part” of executive pay is now tied to performance.

Much more could be done to encourage “long-termism,” such as changes in the tax code and quicker disclosure(披露) of stock acquisitions. In France, shareholders who hold onto a company investment for at least two years can sometimes earn more voting rights in a company.

Within companies, the right compensation design can provide motivation for executives to think beyond their own time at the company and on behalf of all shareholders. Britain’s new rule is a reminder to bankers that society has an interest in their performance, not just for the short term but for the long term.

【推荐3】Making beers on the moon might seem like a pipe dream to many, but for a group of students from the University of California at San Diego, there is a chance to take their research beyond Earth’s surface.

The Lab2Moon competition, held by TeamIndus, is offering students the chance to secure a spot on the TeamIndus rocket this year.

Taking craft beer to the next level, the students want to test whether it’s possible for yeast(酵母) to work and create beer on the moon. However, they believe the experiment is not just a creative concept for astronauts, it’s also important for the development of drugs and yeast-containing food, like bread.

“The idea started out with a few laughs among a group of friends,” said Neeki Ashari, a fifth-year bioengineering students at UC San Diego. “We all appreciate the craft beer. When we heard that there was an opportunity to design an experiment that would go up on India’s moonlander, w e thought we could combine our hobby with the competition by focusing on the practicality of yeast in outer space.”

The preparation work for the beer — up to the stage of adding yeast — will all be done on Earth, and rather than separating the fermentation ( 发酵) and carbonation stage of making beer, the team plans to combine them.

This removes the need to release CO2 accumulated in the process, which may result in cleanliness and safety issues out in space.

If selected, Team Original Gravity will be the first to make beer in outer space, and the fermentation will take place in a container no bigger than a soda can.

All teams competing for the place will showcase their ideas in Bangalore, India, in March.

Sadly, you won’t be enjoying moon beer in your local craft beer bar anytime soon, as no samples will be brought back. However, this small experiment could provide important data on just how practical it is for us to make and create our own resources on other planets and moons by learning how consumables (消耗品) behave in different environments.

【推荐1】A robot created by Washington State University (WSU) scientists could help elderly people with dementia (痴呆) and other limitations live independently in their own homes.

The Robot Activity Support System, or RAS, uses sensors installed in a WSU smart home to determine where its residents are, what they are doing and when they need assistance with daily activities. It navigates (定位) through rooms and around obstacles to find people on its own, provides video instructions on how to do simple tasks and can even lead its owner to objects like their medication or a snack in the kitchen.

“RAS combines the convenience of a mobile robot with the activity detection technology of a WSU smart home to provide assistance in the moment, as the need for help is detected,” said Bryan Minor, a postdoctoral researcher in the WSU School of Electrical Engineering and Computer Science.

Currently, an estimated 50 percent of adults over the age of 85 need assistance with every day activities such as preparing meals and taking medication and the annual cost for this assistance in the US is nearly $2 trillion. With the number of adults over 85 expected to triple by 2050, researchers hope that technologies like RAS and the WSU smart home will relieve some of the financial strain on the healthcare system by making it easier for older adults to live alone.

RAS is the first robot researchers have tried to incorporate into their smart home environment. They recently published a study in the journal Cognitive Systems Research that demonstrates how RAS could make life easier for older adults struggling to live independently.

“While we are still in an early stage of development, our initial results with RAS have been promising,” Minor said. “The next step in the research will be to test RAS’ performance with a group of older adults to get a better idea of what prompts, video reminders and other preferences they have regarding the robot.”

【推荐2】Your circle of friends may help you get a better reading on your overall health and wellness rather than just using wearable devices such as a Fitbit, according to researchers.

The study, published in the journal PLOS ONE, analyzed what the structure of social networks says about the state of health, happiness and stress.

"We were interested in the topololgy (拓扑学) of the social network — what does my position within my social network predict about my health and well-being said Nitesh V. Chawla, a professor at the University of Notre Dame in the US.

“What we found was the social network structure provides a significant improvement in predictability of wellness states of an individual over just using the data obtained from wearables, like the number of steps or heart rate,” Chawla said.

For the study, participants wore a Fitbit to capture health behavior data about walking, sleeping, heart rate and overall activity level. They also completed surveys and self-assessments of their stress, happiness and positivity.

Cbawla and his team then analyzed the data with a machine learning model, alongside the connections and characteristics of an individual's social network.

The study showed a strong correlation (相关性) between social network structures, heart rate, number of steps and level of activity.

Social network structure provided significant improvement in predicting one's health and well-being compared to just looking at health behavior data from the Fitbit alone.

For example, when social network structure is combined with the data from wearables, the machine learning model achieved a 65 percent improvement in predicting happiness.

The model also achieved a 54 percent improvement in predicting one's self-assessed health prediction, a 55 percent improvement in predicting positive attitude and a 38 percent improvement in predicting success.

This study asserts (断言) that without social network information, we only have an incomplete view of an individual's wellness state, and to be fully predictive or to be able to obtain interventions (干扰). It is critical to be aware of the social network, Chawla said.

【推荐3】The assumption that depression is a disease has been supported by biologists, psychiatrists and companies producing medicine. Although advances in medical treatment have certainly been responsible for reducing much suffering, sticking to the disease model is preventing a more complete understanding of why we are so likely to suffer from depression, with at least 45% of people experiencing the condition in their lifetimes.

My recent review of theories and personal observations suggests that depression might serve some useful functions. We should not forget that depression has meaning, and that there is a real new life after recovery.

A recent study of depression in Holland showed that people seemed to cope better with hardships in life after depression than they were doing before it. In the group as a whole, liveliness, psychological health, social and spare-time activities, performance at work and general health all significantly improved upon recovery from depression.

Depression can lead to great insights(洞察力) and achievements. More than 2,000 years ago, Aristotle believed depression to be a state of great moral and spiritual value because of the insights it could bring. The philosopher John Stuart Mill wrote his famous work, Utilitarianism, at the age of 19 and became depressed at the age of 21. Upon recovery, he admitted that the experience had taught him an important lesson---that he should not sacrifice(牺牲) his social and emotional development to intellectual ambition.

Theories have suggested that depression could be a defense against the long-time stress. It is possible that depression defends us against the tendency to ignore our true needs by chasing unobtainable goals and helps to bring these needs into sharper focus.

Depression may bring about a “rebirth” because it removes a false idea about oneself. There is some evidence from scientific studies to show that depressed people are rather more realistic in their thinking than “healthy” individuals. With recovery, a new kind of truth could be found, which would do away with blind optimism: a more modest evaluation of the depressed person’s own ability, containing a more balanced picture of his or her life.

Depression may have forced our ancestors to look again at their strengths and weaknesses, and their coping strategies. Regardless of the reason for falling into depression, the journey has potential to make us better equipped, in a general sense, for life.