Are some people born clever, and others born stupid? Or is intelligence developed by our environment and our experience? Strangely enough, the answer to these questions is yes. To some degree our intelligence is given to us at birth, and no amount of education can make a genius out of a child born with low intelligence. On the other hand, a child who lives in a boring environment will develop his intelligence less than one who lives in rich and varied surroundings. Thus the limits of person's intelligence are fixed at birth, whether or not he reaches those limits will depend on his environment. This view, now held by most experts, can be supported in a number of ways.

    It is easy to show that intelligence is to some degree something we are born with. The closer the blood relationship between two people, the closer they are likely to be intelligent. Thus if we take two unrelated people at random from population, it is likely that their degree of intelligence will be completely different. If, on the other hand, we take two identical twins, they will very likely be as intelligent as each other. Relations like brothers and sisters, parents and children, usually have similar intelligence, and this clearly suggests that intelligence depends on birth. Imagine now that we take two identical twins and put them in different environments. We might send one, for example, to a university and the other to a factory where the work is boring. We would soon find differences in intelligence developing, and this indicates that environment as well as birth plays a part. This conclusion is also suggested by the fact that people who live in close contact with each other, but who are not related at all are likely to have similar degree of intelligence.

    “This way, everyone.” said the young Bahamian as he led the way to the boat. As the boat moved over the waves, I thought back eleven years to my first island visit via a cruise ship. As we landed, I noticed a sign advertising swimming with dolphins. I looked at my mother; she knew exactly what I wanted, but I was too young. “Maybe some other time,” she said. I think everyone knows that those four words usually translate to never. It made me, a little boy, depressed for many days. From that day on, it was my dream to swim with those gentle creatures.

    Now, after 15 minutes of travelling, we reached the Sanctuary Bay. As we arrived, I saw the gray creatures showing off their unique talent before my eyes. We were led off the boat, past a back building. Our guide told us we would have the pleasure of spending the next 90 minutes with Kaholo, a young male, and Robola, the largest female, who is quite famous for having played the lead in the film Zeus and Roxanne.

    My father and I were joined by four others and followed the man once more. He told us to jump into the water while he let the dolphins into that part of the bay. For the first 20 minutes, we could go anywhere and touch the dolphins as they swam by.

    Kaholo and Robola must have known I was their biggest fan because they swam towards me as if I had had fish. After the introductory period, they jumped over our heads. I got a hug and kiss from Robola, and also learned how to have Kaholo talk to me.

    This was by far the most magical experience of my life. Next time your parents say “Maybe some other day”, have faith in them. Your dreams are important to them too, and they will do whatever they can to make it possible, because dreams can come true.

    We're surrounded by chemistry in everyday life. Sometimes it is easy to see, like when your science teacher conducts a big experiment in class. At other times, it can be extremely hard to see everyday chemistry at work, but nearly everything you touch or use has some element of chemistry in it.

    Something as simple as toothpaste contains at least three chemicals, if not more. It is the mixture of them and its chemical reaction that keeps your teeth clean. Other things you use every day are created by chemistry, such as hair products, shampoo and soap. Adding detergent (洗涤剂) to water involves chemistry. Without chemistry, we would never have realized that we need soap to get the oil out of clothes or skin.

    Chemistry not only helps us make products for use, but it also helps us understand the world around us. Chemistry helps us understand what the ozone layer (臭氧层) is and how it protects us. Chemistry also gives us sunscreen to protect us from the sun. Thanks to chemistry, we know bleach (漂白剂) can't be mixed with vinegar, because it can produce poisonous gas. Without chemistry, we wouldn't have had fireworks displays on important days like the Spring Festival.

    Chemistry plays a big role in food preparation. Cooking food causes it to go through a chemical change. That is why cooked food often tastes different from raw (生的) food. Baking is a great example of chemistry. Too much or too little of any ingredient makes a difference to the result of baking, for example, the dough (面团) won't rise or the cake will be flat.

    Chemistry isn't something that just lives in a lab; it's something that you come across hundreds of times every day. If you know how chemistry works, you will get a greater comprehension of the science behind some of the simplest looking things.

    This is a family story my father told me about his mother, my grandmother.

In 1949, my father had just returned home from the war. On every American highway you could see soldiers in uniform hitchhiking home to their families, as was the custom at that time in America.

    Sadly, the thrill of his reunion with his family was soon overshadowed. My grandmother became very ill and had to be hospitalized. It was her kidneys, and the doctors told my father that she needed a blood transfusion immediately or she would not live through the night. The problem was that grandmother's blood type was AB-, a very rare type even today, but even harder to get then because there were no blood banks or air flights to ship blood. All the family members were typed, but not one member was a match. So the doctors gave the family no hope; my grandmother was dying.

    My father left the hospital in tears to gather up all the family members, so that everyone would get a chance to tell grandmother goodbye. As my father was driving down the highway, he passed a soldier in uniform hitchhiking home to his family. Deep in grief, my father had no inclination at that moment to do a good deed. Yet it was almost as if something outside himself pulled him to a stop, and he waited as the stranger climbed into the car.

    My father was too upset to even ask the soldier his name, but the soldier noticed my father's tears right away and inquired about them. Through his tears, my father told this total stranger that his mother was lying in a hospital dying because the doctors had been unable to locate her blood type, AB-, and if they did not do it before nightfall, she would surely die.

    It got very quiet in the car. Then this unidentified soldier extended his hand out to my father, palm up. Resting in the palm of his hand were the dog tags from around his neck. The blood type on the tags was AB-. The soldier told my father to turn the car around and get him to the hospital.

    My grandmother lived until 1996, 47 years later, and to this day no one in our family knows the soldier's name. But he is always remembered by us.

    What would you like to be when you grow up? A teacher? A doctor? An astronaut? What do you need to do to achieve your dream job?

    Perhaps you think that studying well and then going on to work hard will get you the successful career you want. We are constantly taught that our hard work will eventually pay off.

    But a government survey has shown that hard work is not the only thing that will help you to move up the ladder. Two thirds of people believe that who you know matters more than what you know when it comes to social activity. So are the connections that you have more important than your education?

    Seventy-six percent of the people in the survey believed that family background is important in influencing your chances of success. They believe that if you are privileged from birth, you are more likely to have a successful career, especially if your family is wealthy.

    Even if you don't have a privileged background, the people you know can still make a difference to your career. Networking is a skill which is encouraged by many career advisers. Some companies run networking workshops to try and encourage staff to meet other people, to communicate and build relationships. It's a valuable skill.

    But the survey also showed something quite interesting. Although most people believed that networks are more important than education, many people put their own career success down to talent, rather than background. 41% of the people said that their parents' income had influenced their life, but at the same time, another 41% believed that they had achieved their own success.

    So which is more important, what you know or who you know? It seems that by working hard and making lots of connections, the answer may be that both are very important.

Yoga (瑜伽) is a kind of sport. It is very popular around the world now. Everyone, young or old, men or women, can do yoga.

There are many reasons why people like yoga. First, yoga can build up your muscle. Your body will become stronger and more flexible. Second, yoga helps you get rid of stress. What's more, yoga can help your mind stay calm. To put it simply, the reason why so many people are falling in love with yoga is that they are discovering how wonderful it is for their mind, body and spirit.

Yoga began in India about 5,000 years ago. At that time, people wanted to be free, healthy and live a long life. As a result, this kind of exercise was born. The early yoga was part of the religion (宗教). It was usually taught one to one—one teacher and one student. Later, it was accepted by more people.

Yoga is an Indian word that means "to join together". There are three parts of yoga altogether: exercise, breathing and meditation (冥想). In the past, people paid more attention to the spirit. The idea behind the exercise was to join the mind, body and spirit as one.

With the development of the exercise, more and more people are doing yoga as a way of keeping healthy. Among them, office ladies enjoy doing yoga most. Yoga can give them peace, help them feel relaxed and have fewer worries and illnesses.