Reading can be a social activity. Think of the people who belong to book groups. They choose books to read and then meet to discuss them. Now, the website BookCrossing.com turns the page on the traditional idea of a book group.

    Members go on the site and register the books they own and would like to share. BookCrossing provides an identification number to stick inside the book. Then the person leaves it in a public place, hoping that the book will have an adventure, traveling far and wide with each new reader who finds it.

    Bruce Pederson, the managing director of BookCrossing, says, “The two things that change your life are the people you meet and books you read. BookCrossing combines both.”

    Members leave books on park benches and buses, in train stations and coffee shops. Whoever finds their book will go to the site and record where they have found it.

    People who find a book can also leave a journal entry describing what they thought of it. E-mails are then sent to the BookCrossing to keep them updated about where their books have been found. Bruce Peterson says the idea is for people not to be selfish by keeping a book to gather dust on a shelf at home.

    BookCrossing is part of a trend among people who want to get back to the “real” and not the virtual(虚拟). The site now has more than one million members in more than one hundred thirty-five countries.

    Many people don't consider their breakfast without a glass of milk. Right now, cows, buffalos, goats and sheep provide most of the world's milk. But soon, people could get milk from roaches(蟑螂).

    That isn't as crazy as it might sound. New research shows this “milk” is super-nutritious. What's more, some scientists have already begun referring to a lot of insects as source of milk.

    In 2004, Subramanian Ramaswamy started studying milk crystals found inside the roach. At the time, he was teaching biochemistry at the University of Iowa City.

    To learn more about the milk crystal from roaches, the scientists used X-rays to look at the atoms in it. The data basically revealed the chemical recipe of the roach crystal. They showed that roach milk is a “complete food”. It contains sugar with a fatty acid stuck to it. Fatty acids are the building blocks of fats. The protein in the milk is also full of essential amino(氨基的) acids, which are the building blocks of proteins. Since our bodies can't produce the “essential” ones, we need to get them from our food. And so do baby roaches.

    Barbara Stay, a biologist at Iowa University, also worked on the new study. She says the new data show that the roach milk is “three times more nutritious than cow's milk and four times more nutritious than buffalo's milk”.

    Ramaswamy would like to see roach milk turned into a protein supplement to feed hungry people. But not everyone is confident that it can be done.

    Marcel Dicke studies insects as a potential source of human food at Wageningen University in the Netherlands. Dicke says this is a “sound study”. However, in his opinion, “Extracting(提取) milk from roaches can only likely be done in a destructive way with only small quantities”. That means you'd have to raise and kill many bugs to get even tiny quantities of the milk.

    Foxes and farmers have never got on well. These small dog-like animals have long been accused (控告)of killing farm animals. They are officially considered as harmful and farmers try to keep their numbers down by shooting or poisoning them.

    Farmers can do call on the services of their local hunt to control the fox population. Hunting consists of hunting a fox across the countryside, with a group of specially trained dogs, followed by men and women riding horses. When the dogs eventually catch the fox, they kill it or a hunter shoots it.

    People who take part in hunting think of it as a sport; they wear a special uniform of red coats and white trousers, and follow strict codes of behavior. But owning a horse and hunting regularly is expensive, so most hunters are wealthy.

    It is estimated (估计) that up to 100,000 people watch or take part in fox hunting . But over the last couple of decades the number of people opposed to fox hunting, because they think it is cruel, has risen sharply. Noisy confrontations between hunters and saboteurs have become so common that they are almost as much a part of hunting as the hunting of foxes itself. But this year supporters of fox hunting face a much bigger threat to their sport. A Labour Party Member of the Parliament, Mike Foster, is trying to get Parliament to approve a new law which will make the hunting of wild animals with dogs illegal. If the law is passed, wild animals like foxes will be protected under the ban in Britain.

    Blue Planet It's latest episode focuses on how plastic is having a devastating effect on the ocean and slowly poisoning our sea creatures. Researchers recently also found that sea creatures living in the deepest place on Earth, the Mariana Trench, have plastic in their stomachs. Indeed, the oceans are drowning in plastic.

    Though it seems now that the world couldn't possibly function without plastics, plastics are a remarkably recent invention. The first plastic bags were introduced in the 1950s, the same decade that plastic packaging began gaining in popularity in the United States. This growth has happened so fast that science is still catching up with the change. Plastics pollution research, for instance, is still a very early science.

    We put all these plastics into the environment and we still don't really know what the outcomes are going to be. What we do know, though, is disturbing. Ocean plastic is estimated to kill millions of marine animals every year. Nearly 700 species, including endangered ones, are known to have been affected by it. One in three leatherback turtles, which often mistake plastic bags for jellyfish, have been found with plastic in their bellies. Ninety percent of seabirds are now eating plastics on a regular basis. By 2050, that figure is expected to rise to 100 percent.

    And it's not just wildlife that is threatened by the plastics in our seas. Humans are consuming plastics through the seafood we eat. I could understand why some people see ocean plastic as a disaster, worth mentioning in the same breath as climate change. But ocean plastic is not as complicated as climate change. There are no ocean trash deniers (否认者), at least so far. To do something about it, we don't have to remake our planet energy system.

    This is not a problem where we don't know what the solution is. We know how to pick up garbage. Anyone can do it. We know how to dispose (处理) of it. We know how to recycle. We can all start by thinking twice before we use single-use plastic products. Things that may seem ordinary, like using a reusable bottle or a reusable bag--when taken collectively, these choices really do make a difference.

We use both words and body language to express our thoughts and opinions in our interactions with other people. We can learn a lot about what people are thinking by watching their body language. Words are important, but the way people stand, hold their arms, and move their hands can also give us information about their feelings.

Just like spoken language, body language varies from culture to culture. The crucial thing is using body language in a way that is appropriate to the culture you are in. For example, making eye contact—looking into someone's eyes—in some countries is a way to display interest. In other countries, by contrast, eye contact is not always approved of. For example, in many Middle Eastern countries, men and women are not socially permitted to make eye contact. In Japan, it may demonstrate respect to look down when talking to an older person.

The gesture for "OK" has different meanings in different cultures. In Japan, someone who witnesses another person employing the gesture might think it means money. In France, a person encountering an identical gesture may interpret it as meaning zero. However, you should avoid making this gesture in Brazil and Germany, as it is not considered polite.

Even the gestures we use for "yes" and "no" differ around the world. In many countries, shaking one's head means "no", and nodding means "yes". By comparison, in Bulgaria and southern Albania, the gestures have the opposite meaning. There are also differences in how we touch each other, how close we stand to someone we are talking to, and how we act when we meet or part. In countries like France and Russia, people may kiss their friends on the cheek when they meet. Elsewhere, people favour shaking hands, bowing from the waist, or nodding the head when they meet someone else.

Some gestures seem to have the same meaning everywhere. Placing your hands together and resting them on the side of your head while closing your eyes means "sleep". A good way of saying "I am full" is moving your hand in circles over your stomach after a meal.

Some body language has many different uses. Perhaps the best example is smiling. A smile can help us get through difficult situations and find friends in a world of strangers. A    smile    can    break    down    barriers. We can use a smile to apologise, to greet someone, to ask for help, or to start a conversation. Experts suggest smiling at yourself in the mirror to make yourself feel happier and stronger. And if we are feeling down or lonely, there is nothing better than seeing the smiling face of a good friend.

How to gain happiness? Aristotle, a famous Greek philosopher（哲学家）, believed that happiness is achieved through the development of certain virtues, stressing a balanced lifestyle. {#blank#}1{#/blank#}.

Balancing Personal Strengths and Relationships

Aristotle combined virtues like modesty, honesty, and sociability into one principle: balance knowing yourself with getting along with others. Modesty（谦虚）involves recognizing both your true strengths and weaknesses clearly. {#blank#}2{#/blank#}. Honesty means being true in your expressions. Sociability stresses the necessity of making and keeping friends.

Managing Emotions and Actions

{#blank#}3{#/blank#}. Aristotle said it's normal to feel emotions like anger, but the key to happiness is how you handle these feelings. Justice（公平）involves treating others fairly and balancing one's needs with the needs of others. Strength involves facing fears and carefully considering risks before acting, which helps you achieve your goals confidently.

Practicing Kindness and Tolerance（宽容）

Generosity, tolerance, and grace are virtues that Aristotle considered to be part of kindness. Generosity isn't just about giving things to others, but also about doing so thoughtfully. {#blank#}4{#/blank#}. Grace combines a sense of humor with the seriousness required in certain situations, helping to keep a pleasant and supportive presence around others.

{#blank#}5{#/blank#}. He teaches us that happiness is not just about seeking pleasure or avoiding pain, but about developing a balanced character. By developing these virtues and finding a balance in everything we do, we can lead truly happy and satisfying lives.

A. Aristotle stressed the importance of knowing oneself

B. This principle combines self-control, justice, and strength

C. Such realistic self-view makes you more confident and happier

D. Tolerance involves excusing others' mistakes while keeping self-respect

E. In short, Aristotle's approach to happiness is about finding balance in life

F. Here's a simple explanation of his ideas designed for high school students

G. A person who knows how to be happy needs to develop a balanced sense of justice