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    William Lindesay, a British traveler and writer, has been exploring the Great Wall—one of the human's most wonderful building projects. Not even a Chinese knows the Great Wall of China as well as he does.

    When, as a schoolboy, Lindesay announced his plan to explore the Great Wall, nobody took him seriously. But Lindesay achieved his goal, by spending 25 years on the Great Wall and has become one of the world's most famous experts on its rich history. Lindesay now lives and works in Beijing. This year his new book has come out, The Great Wall Explained, with a lot of photographs and articles.

    Running on the Great Wall was a brave trip and Lindesay had already run 3,000 kilometers along it! During those years, he got to many villages along the way. He was often helped by friendly villagers, although they didn't quite understand why the Englishman would have such interest in the Great Wall.

    The ostrich is the largest bird in the world. The ostrich is found in nature in Africa, but it is raised all over the world for its meat.

    The ostrich is a unique（独特的）looking animal. It has long skinny legs, a big body with small wings, a long neck, and a dangerous long beak（喙）.Even though it has wings, it can't fly. But they aren't completely useless either. They help a lot with balance when the ostrich is running at full speed and needs to change directions. The ostrich usually weighs between 200 and 300 pounds and can grow to 9 feet tall. Its large body is covered with feathers.

    The ostrich is famous for its speed on the ground. Its powerful legs allow it to reach speeds of 40 miles per hour! Ostriches can also use their strong legs to kick any enemy or even kill a human or a lion. However, in most cases the ostrich just use its speed to run away from any danger.

    Ostriches eat whatever they can find. This includes plants ,insects, and small animals like lizards. They often live in groups. A group will have around ten birds, but some groups even have 100 birds. This way the whole group can help to protect the eggs. Ostrich eggs are the biggest eggs of any animal at an average of 3 pounds.

    Ostriches don't actually put their head in the ground as many cartoons like to show. What they really do is to lie down and put their head and neck flat on the ground to hide. From a distance all you can see is their body, so it appears as if they have put their head in a hole in the ground. Ostriches can not only kick with powerful feet, they are also armed with 4 inch long claws（爪）on their feet.

    Aron Ralston is an American man who is interested in mountain climbing. As a mountain climber, Aron is used to taking risks. This is one of the exciting things about doing dangerous sports. There were many times when Aron almost lost his life because of accidents. On April 26, 2003, he found himself in a very dangerous situation when climbing in Utah.

    On that day, Aron's arm was caught under a 360-kilo rock when he was climbing by himself in the mountains. Because he could not free his arm, he stayed there for five days and hoped that someone would find him. But when his water ran out, he knew that he would have to do something to save his own life. He was not ready to die that day. So he used his knife to cut off half his right arm. Then, with his left arm, he bandaged himself so that he would not lose too much blood. After that, he climbed down the mountain to find help.

    After losing his arm, he wrote a book called Between a Rock and a Hard Place. This means being in a difficult situation that you cannot seem to get out of. In this book, Aron tells of the importance of making good decisions, and of being in control of one's life. His love for mountain climbing is so great that he kept on climbing mountains even after this experience.

    Do we have the same spirit as Aron? Let's think about it before we find ourselves "between a rock and a hard place" and before we have to make a decision that could mean lire or death.

    On Nov. 18, 1908, three men went up in a balloon. They started early in London. The headman was Augusta Gaudron, and the other two men were Tannar and Maitland. They had a big balloon and they were ready for a long way.

    Soon they heard the sea. They carried a usual rope, and it was hanging down from the basket of the balloon. At the end of the rope they had tied(系) a metal box. This could hold water, or it could be empty. So they were able to change its weight. It was for use over the sea. They also carried some bags of sand.

    After the Sun rose, the balloon went higher. It went up to 3,000 metres, and the air was very cold. The water in the box became ice. Snow fell past the men's basket, and they could see more snow on the ground. The men tried to throw out some more sand; but it was hard. They tried to break the icy sand with their knives, but it was not easy. The work was slow and they were still falling, so they had to drop(投下) some whole bags of sand.

    One of them fell on an icy lake and made a black hole in the ice.

At last they pulled the box into the basket. They rose to 5, 100 metres! Everything became icy. They were so cold that they decided to land. They came down in Poland safely. They had travelled 1,797 kilometres from London!

    The survey(调查) shows the reasons why some people in the UK like cycling better. Many people who choose cycling say riding a bicycle to work is healthier than driving. 30% of them give this as a reason. The same number of people say that they cycle to work because it causes less pollution. Fifteen percent of people cycle to work because they don't need to worry about getting a parking space. Thirteen percent of them think cycling is cheaper. Surprisingly, the fewest number of people say that they cycle to work because it is faster than traveling by car. If a person lives near his or her work place, cycling is faster than driving.

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