A new study says that the faces on Lego minifigures have become less happy and more often mad or sad. The study was designed to find out if the Lego characters have become grumpier over the years.

Christoph Bartneck works at the University of Canterbury in New Zealand. He loves Lego and even worked for the company in the 1990s. He worked with another researcher on the project. They looked at all of the 6,000 figures made between 1975 and 2010. They made a note of each figure’s facial expression: happy, grumpy, afraid, surprised or satL They discovered that while in 1980, all of the figures were described as “smiley”, and that by 1990, only about 80 per cent of them had been “smiley” . And by 2010, just 50 per cent of the figures had had a smile on their little plastic faces.

The researchers are wondering how the increasingly sad, angry and unhappy faces on the Lego figures will affect the children who play with them. “Children’s toys can have an important influence on children,” said Bartneck on the university’s website. While Lego hasn’t issued an official response to the study, Bartneck said he thought the reason why Lego was producing angrier-faced characters was that children wanted them. He said it was likely that people wanted Lego characters to have different expressions, rather than just being sunny all the time. He said most of the unhappy faces were on characters based on a specific theme such as Harry Potter or pirates (海盗).

Bartneck will present his findings at the International Conference on Human-Agent Interaction in Sapporo.

   It is a hot summer day， and you feel thirsty. A friend gives you a glass of cold lemonade. How do you feel when you see the glass? Will you describe your feeling as happiness or as pleasure? I believe you will say it is a feeling of pleasure. There is a connection between these two kinds of feelings，and sometimes one causes the other， but they are not the same. Pleasure is more dependent on the five senses while happiness is independent of them.

When you are happy，unpleasant events usually do not disturb you. When you are unhappy，you feel as if everything is against you. You may compensate for it by eating chocolate and sweets because this gives you pleasure，yet you still stay unhappy. A person may smoke cigarettes because it gives him pleasure，yet this does not make him happier，especially if he knows the fact that it is not good for his health.

The physical world is always in a changing state. At each moment a new thing is being created，changed， transformed and then destroyed. This is the normal state of things and no one can change it. If we stay still in a certain state， we are sure to experience unhappiness sooner or later. On the other hand，if we adapt to the environment，nothing can influence our moods. Then outer events have nothing to do with our inner joy of mind.

The room of the mind is filled with worry or fear. If you are free of thinking about them，the room will be empty，and then you will see what is happening and experience it. When your mind stays quiet，you will see that happiness comes from the inside.

   Ask most people anywhere in the world what they want out of life and the reply will probably be“to be happy”. Ed Deiner，an American psychology professor，has spent his whole life studying what makes people happy，comparing levels of happiness between cultures and trying to find out exactly why we enjoy ourselves.

Many people would say that this question does not need an answer. But Professor Deiner has one anyway. “If you’re a cheerful，happy person，your marriage is more likely to last，and you’re more likely to make money and be successful in your job. On average，happy people have stronger immune systems（免疫系统），and there is some evidence that they live longer. ”

So who are the world’s happiest people？It depends on how the word is defined. There is individual（个人的）happiness，the sense of joy we get when we do something we like. But there is also the feeling of satisfaction we get when we know that others respect us and approve of how we behave. According to Professor Deiner，the Western world pursues individual happiness while Asia prefers mutual satisfaction.

“In the West，the individualistic culture means that your mood matters much more than it does in the East. People ask themselves if they are doing what is fun or interesting. They become unhappy when they can’t do any of these things. If you ask people from Japan or China whether they are happy，they tend to look at what has gone wrong in their lives. If not much has gone wrong，then they are satisfied. ”

“People from Spain and other Spanish-speaking countries have the happiest culture，”Professor Deiner found. “The biggest cultural difference is to do with pride and shame. Hispanic cultures report much more pride and much less shame than others. ”

Income（收入）also makes a big difference to people’s happiness，but only at the lowest levels. Average income earners in the US are much happier than people in poverty. But millionaires are only a little bit happier than people on average incomes. It seems that money makes us happy when we have enough to feel safe.

   As the pace of life continues to increase, we are fast losing the art of relaxation. _______ you are in the habit of rushing through life, being on the go（忙碌）from morning till night, it is hard to _______. But relaxation is _______ for a healthy mind and body.

Stress is a（n）_______ part of everyday life and there is no way to _______ it. In fact, it is not the bad thing that it is often supposed to be. A _______ amount of stress is important to provide motivation and give _______ to life. It is only when stress gets out of control that it can lead to poor performance and _______ health.

The amount of stress a person can bear _______ very much on the individual. Some people are not afraid of stress, and such a ________ is obviously chief material for managerial responsibilities. Others lose heart at the ________ of unusual difficulties. When exposed to stress, in whatever form, we ________ both chemically and physically. In fact we make a choice between ________ and fight. And in more ancient days the choices made the ________ between life and death. The crises we meet today are ________ to be so extreme, but however little the stress, it requires the same response. It is when such a reaction ________ long, through continued exposure to stress, that health becomes ________. Such serious conditions as high blood pressure and heart disease have ________ links with stress. Since we cannot ________ stress from our lives we need to find ways to ________ it.

So what do you think of stress? What is your way to deal with it?

   A start-up company in California, called Zume, is testing machines that make pizza. The robot takes and shapes dough to create the base of the pizza. It then adds tomato sauce, cheese, meat or other toppings. Next, the robot places the uncooked pizza into a hot oven. A few minutes later, the pizza is ready. The pizza comes out the same each time. Zume says the robots work quickly and do not get sick. The robots do not get paid either.

Julia Collins is the company’s founder and chief executive officer (CEO) . Her business can spend money on better food products because it does not have to pay the robots. Zume is using robots to make pizza.

Charity Suzuki has bought the robot-made pizza. She likes its taste. “It’s delicious. It’s always hot and fresh when it comes. I mean it’s great that they’re making it, but I can’t tell the difference that it’s made by a robot versus a human.”

Other companies say they are developing robots so people can get higher quality food faster. But what about the jobs the robots are taking from humans?

Ken Goldberg is a professor at the University of California in Berkeley. He also directs the school’s automation laboratory. Goldberg says researchers have been working with robots for 50 years. He says that, while there has been progress, the jobs are not going to disappear right away. “I want to reassure (使放心) restaurant workers that the skills that they have are still going to be of value,” Goldberg said.

“We’re going to get rid of boring, repetitive, dangerous jobs and we’re going to free up people to do things that have higher value. There’s going to be amazing new ways of working that don’t exist yet but are going to be created.”