Many of us still tend to think that emotions can affect reasonable thought，and sometimes land us in trouble. But in recent years psychologists have taken quite a different view. Keith Oatley，Professor of Psychology at Glasgow University，is involved in the research which shows the fundamental importance of emotions.

    He believes we are very ambivalent about them：we think of our emotions as being unreasonable，but we also consider them as essential to being human. For example，Mr. Spock，a character in the television series Star Trek，is super­intelligent and he has no emotions at all. However，he is never made captain of the spaceship. Maybe，this is because Mr Spock is not the kind of person you can share your feelings with—a person who shows his emotions.

    As Professor Oatley points out，our emotions have very important functions，for example，fear. If we cross the road and a car approaches，we usually stop moving or step back. We stop what we are doing，check what we have done and pay very careful attention to the environment. The emotion of fear makes us take this small series of actions which,on average, help protect our safety.

    On the other hand，if things are going well and small problems come up，we find we can solve them with the resources we have to hand. As a consequence, we tend to feel happy and usually continue doing the job.

    Anger is an emotion that tends to occur when someone is preventing us from doing something. Then this small “kit” of reactions enables us to prepare ourselves to be quite aggressive to that person，or to try harder，and so on.

    Professor Oatley believes emotions generally occur at these important moments in actions. With fear and anger our emotions make us decide to start doing something else, while with happiness they “suggest” we continue what we are already doing.

Disney has picked Chinese actor Liu Yifei to play Mulan in an upcoming film, following accusations against Hollywood of ‘whitewashing'.

    Several Hollywood films have faced criticism in recent months for featuring white actors in Asian roles. Recent films accused of whitewashing include the Hollywood remake of Japanese anime Ghost in the Shell, which had Scarlett Johansson in the main role which was originally Japanese, and Chinese epic The Great Wall which starred Matt Damon as its lead character. Earlier this year, British actor Ed Skrein who was cast as an Asian character in the upcoming Hellboy remake pulled out of the film so that the role could be “cast appropriately”. It then went to Korean-American actor Daniel Dae Kim.

    The live-action adaptation of the 1998 cartoon movie will tell the tale of the well-known Chinese heroine Hua Mulan. Mulan pretended to be a man to fight in the army to spare her weak father from being forced into the army.

    The film has been under careful examination since it was announced that Disney intended to remake Mulan. An online campaign calling for an Asian actress in the role attracted more than 100,000 signatures before it was shut on Thursday.

    Liu, nicknamed “Fairy Sister” for her delicate looks and previous roles in fantasy dramas, is well-known as an actress, model and singer in China. The 30-year-old is said to be fluent in English, having grown up partly in New York. The Hollywood Reporter said she was picked out of nearly 1,000 candidates for the film.

Disney's announcement on its blog about Liu's casting was met with delight on Twitter as well as on Sina Weibo, China's microblogging network. Many online celebrated it as a win for diversity in Disney films. Chinese-American actress Ming-Na Wen, who voiced Mulan in the original animated movie, also gave her stamp of approval. Chinese netizens congratulated Liu, with many praising Disney's choice. One commenter said, “Needs to know martial arts, can also speak English, has star quality - it definitely should be Liu Yifei.”

    Recently, we've been talking about how we need better teachers. There's no doubt that great teacher can help in a student's learning but here's what some new studies are also showing: We need better parents.

    Every three years, the organization called O.E.C.D. organizes exams as part of the Program for International Student Assessment(评估), or PISA, which tests 15-year-olds on their abilities to deal with real problems. America's 15-year-olds have not done as well as students in Singapore, Finland and Shanghai in the PISA exams.

    To better understand the reasons, the PISA team, starting with four countries in 2006, and then adding 14 more in 2009, went to the parents of 5,000 students. They interviewed them about how they raised their kids and then compared it with the test results for each of those years. Two weeks ago, the PISA team published the main finding of its study.

    Fifteen-year-olds whose parents often read books with them during their first year of primary school get much higher scores in PISA 2009 than students whose parents don't often read with them or not at all. Parents' concern for their children is strongly connected with better results in PISA.

    According to Schleicher, the leader of the team, just asking your children how their school    day was and showing great interest in their learning can help a lot. It is something every parent can do, no matter what their education level is.

    The study found that getting parents concerned about their children's learning at home is more powerful than parents attending parent-teacher meetings, volunteering in classrooms,   taking part in money-raising, and showing up at back-to-back nights.

    To be sure, nothing can replace a good teacher. But let's stop putting the whole duty on teachers. We also need better parents. Better parents can make teaching more beneficial.

    It had been a long winter. Bitter cold, snowy days had hit us again and again. On the warmer days there had been little sunshine, but only cold, icy rain. The sun had become such a rare sight that I had to look at a picture of it on my wall calendar from time to time to remember what it looked like. The grass had remained brown and dormant（潜伏的）in the grassland. My own backyard had turned into a muddy mess that tried to steal the shoes right off my feet as I walked on it. My heart ached and longed for spring, and my own good cheer had trouble rising up against the continuous, cold, gray days.

    The rain poured down on me as I walked my dogs, holding their leashes in my icy fingers. I looked up at the sky hoping to see the sun smiling down with its warm, golden face. But it was no use. It was then, however, that I saw it. It wasn't the smiling face of the sun in the sky but a little, yellow face peeking（微露出） through the mud. It was a tiny flower, and it filled my heart with hope and joy. I smiled and thanked God for this little sign that winter would soon be over and that spring would arrive. I felt my good cheer rising up at last and I promised God that I would share it with everyone I could.

    One day that tiny flower's seeds will fill the grassland with little, yellow faces smiling up from the ground. Its work will make this world a better and more beautiful place. May we all do the same. May we all shine our light and share our love even on the coldest and grayest days. May we all help to share a bit of spring in winter. May we all work to make this world better and brighter even when it is at its darkest.

    Charlie is a teacher and his wife, Maria is an artist. The night before last, just before the longest day of the year, Charlie was sitting in a deckchair enjoying the warm summer air when Maria touched his shoulder and he could tell immediately she was a little worried about something. He asked her what the matter was and she replied that there was a strange thing on the jacket that was hanging in the bedroom. They had both lived in the West Indies (西印度群岛) and had seen a lot of strange creatures in their house before. But now they were living in England and so Charlie just laughed and said he would have a look at the "thing".

    He walked to the bedroom. He saw a jacket hanging in the bedroom and went up to it to have a closer look at the "thing". The moment he touched it, the thing sprang into life. Now Charlie experiences fear like the rest of us but when this creature opened its wings, he jumped out of his skin and ran screaming from the room like a small child doing about 100 miles an hour.

    For a moment the next-door neighbours thought that Charlie was murdering his wife because of the noise they could hear. In fact, it was a bat that frightened Charlie.

    Eventually Charlie managed to trap the bat in a box and took it to the garden to let the bat fly. Maria, who had been playing the guitar while Charlie was upstairs, asked Charlie if he had found out what the thing was. "Oh, nothing to worry about", he said casually hoping that the terror could not be seen in his eyes, "it was just a bat."

If you've ever seen a sparrow steal your dog food or a crow open a garbage bag, you get a sense of that some birds have learned to take advantage of new feeding opportunities—a clear sign of their intelligence. Scientists have long wondered why certain species of birds are more innovative than others, and whether these capacities stem from larger brains or from a greater number of neurons（神经元）in specific areas of the brain.

It turns out that it's a bit of both, according to a recent study by an international team that included members from McGill University published in Nature Ecology and Evolution.

The researchers used a new technique to estimate the number of neurons in a specific part of the brain called the pallium in 111 bird species. The pallium in birds is equal to the human cerebral cortex（大脑皮层）, which is involved in memory, learning, reasoning, and problem-solving, among other things. When these estimates about neuron numbers in the pallium were combined with information about over 4,000 feeding innovations, the team found that the species with the higher numbers of neurons in the pallium were also likely to be the most innovative.

"The amount of time chicks spend in the nest as their brains develop might also play a crucial role in the evolution of intelligence," says McGill University Emeritus Professor Louis Lefebvre who spent more than 20 years gathering examples of feeding innovations. "Larger species of crows and parrots, which are known for their intelligence, spend longer in the nest, which allows more time for the brain to grow and accumulate pallial neurons."

The results of the study help to deal with previously opposed views of the evolution and significance of brain size and show how a life-history perspective helps to understand the evolution of cognition.