The light from the campfire brightened the darkness, but it could not prevent the damp cold of Dennis's Swamp (沼泽地) creeping into their bones. It was a strange place. Martin and Tom wished that they had not accepted Jack's dare. They liked camping, but not near this swamp.

    “So,” Martin asked as they sat watching the hot coals. “How did this place get its name ? ”

    “Are you sure you want to hear it ? It's a scary story,” warned Jack.

    “Of course!” cried out Tom. “If there were anything to be scared of, you wouldn't have chosen this place!”

    “Ok, but don't say I didn't warn you,” said Jack, and he began this tale.

    “Way back in time, a man called Dennis tried to start a farm here. He built that cottage over there to live in . In those days, the area looked quite different — it was covered with tall trees and the swamp was a crystal-clear river. After three hard years, Dennis had cleared several fields and planted crops. He was so proud of his success that he refused to listen to advice.

    “ 'You are clearing too much land, ' warned one old man. ' The land is a living thing. It will hit back at you if you abuse it. '

    “ ' Silly fool,' said Dennis to himself. 'If I clear more land, I can grow more crops. I'll become wealthier. He's just jealous!'”

    “Dennis continued to chop down trees. Small animals that relied on them for food and shelter were destroyed. He was so eager to expand his farm that he did not notice the river flowing slowly towards his door. He did not notice salt seeping to the surface of the land. He did not notice swamp plants choking all the native plants.”

    “What happened? ” Martin asked. It was growing colder. He trembled, twisting his body closer to the fire.

“The land hit back —- just as the old man warned, ” Jack shrugged. “Dennis disappeared Old folks around here believe that swamp plants moved up from the river and dragged him underwater. His body was never found.”

    “What a stupid story, ” laughed Tom. “Plants can't …” Before he had finished speaking, he screamed and fainted (晕倒). The other two boys jumped up with fright, staring at Tom. Suddenly, they burst out laughing. Some green swamp ivy (常春藤) had covered Tom's face. It was a while before Tom could appreciate the joke.

    Minecraft, a video game with which you can build virtual（虚拟的） worlds, will be used in the classroom. Microsoft bought the game from its Swedish creator for 2.5 billion dollars. Now, the software（软件） company wants to offer schools a special educational version（版本）.

    MinecraftEdu is an add-on to the game, which has specially created by teachers for classroom use. While thousands of classes around the world are already using Minecraft in their lessons, Microsoft wants to make it easier for schools to use the software.

    Minecraft is a game that can be used in many subjects, including maths, science and geography. Microsoft wants to add new features to the educational version, for example letting students take photos and putting them into an online diary. The new version will allow children to download the game and at home without having to pay more money for it. Microsoft is expected to ask students and teachers for about 5 dollars a year to use the game in school and at home.

    According to Microsoft, Minecraft has 100 million players around the world. It has become one of the best-selling games of all times. Pupils can create their own virtual worlds with the help of special building blocks. Joy Morsi, a New York high school teacher, says that Minecraft helps develop the imagination of children in the classroom. Besides, teachers around the world create new things and share them with others, so that the Minecraft community keeps growing.

    Microsoft plans to make the game of available to pupils and students of all ages, from primary school through to college. the company plans to add Minecraft to an Office 365 account(账户), so that it can also sell more of its Office software.

    In a career that lasted more than half a century, Tom Wolfe wrote fiction and nonfiction best-sellers including The Electric Kool-Aid Acid Test and The Bonfire of the Vanities. Along the way, he created a new type of journalism and coined phrases that became part of the American vocabulary.

    Wolfe began working as a newspaper reporter, first for The Washington Post, then the New York Herald Tribune. He developed a literary style in nonfiction that became known as the "New Journalism." "I've always agreed on a theoretical level that the techniques for fiction and nonfiction are interchangeable," he said. "The things that work in nonfiction would work in fiction, and vice versa."

    "When Tom Wolfe's voice broke into the world of nonfiction, it was a time when a lot of writers, and a lot of artists in general, were turning inwards," says Lev Grossman, book critic for Time magazine. "Wolfe didn't do that. Wolfe turned outwards. He was a guy who was interested in other people." Wolfe was interested in how they thought, how they did things and how the things they did affected the world around them.

    In 1979, Wolfe published The Right Stuff, an account of the military test pilots who became America's first astronauts. Four years later, the book was adapted as a feature film. "The Right Stuff was the book for me," says Grossman. "It reminded me, in case I'd forgotten, that the world is an incredible place."

    In The Right Stuff, Wolfe popularized the phrase "pushing the envelope." In a New York magazine article, Wolfe described the 1970s as "The 'Me' Decade." Grossman says these phrases became part of the American idiom because they were accurate.

    "He was an enormously forceful observer, and he was not afraid of making strong claims about what was happening in reality," Grossman says. "He did it well and people heard him. And they repeated what he said because he was right." All those words started a revolution in nonfiction that is still going on.

    If we want to find out what kind of technology people used in the past, we normally have to rely on archaeologists to find ruined buildings and parts of tools or instruments or machines. Archaeologists then try to reconstruct, sometimes with the help of computer technology, what these ancient buildings and objects must have looked like, and how they might have been made. Sometimes historians are lucky and find an ancient document with a written description of these ancient buildings and objects.

    We can understand, then, why Chinese historians were so excited when they found cave paintings which show ancient science. They found these paintings in the world-renowned Mogao Grottoes of Dunhuang City, in Northwest China's Gansu Province. There are 500 man-made caves and they have survived for at least 1,600 years. Almost all of these caves have paintings on their ceilings or walls and they date from the 4th to 14th centuries. Wang Jinyu is an expert on these cave paintings (also called frescoes) and he says: "We discovered frescoes containing scientific and technological content in almost all of the caves which have frescoes." What is remarkable about these cave paintings according to the Xinhua News Agency is that they provide evidence of "scientific and technological inventions by ancient Chinese in maths, physics, chemistry, astronomy, geography, agronomy, architecture, textiles, traffic and transportation, arms and military equipment and medical sciences".

    Among the discoveries experts have made are cave paintings showing ancient techniques of pottery making and wine production and paintings showing ancient weaving machines and then toothbrushes! The paintings also give some evidence of the lifestyle at the time with, for example, pictures of people boiling milk over 1,000 years ago. Experts believe that there is more evidence to be found, but even now the caves are a wonderful natural museum. If the walls and ceilings of the caves were all put together they would form a tapestry 20 kilometers long and 2 meters high!

    It won't be possible to travel back in time-that only happens in films-but visiting these caves would be the nearest experience you could get to travelling back in time.

    MacDonald's will soon remove cheeseburgers and chocolate milk from its Happy Meal menu to set a good example in offering a healthy diet for kids at its restaurants.

    Customers can still ask for cheeseburgers or chocolate milk with kids' meal, but MacDonald's said that not listing them would make them less likely to be ordered. Since it removed soda from the menu four years ago, orders for it with the Happy Meal have fallen by 14%.

    As MacDonald's is known for getting more business from families with children, it is especially important for it to offer a healthy diet instead of junk food. And the Happy Meal is a key part of that. The Happy Meal has long been a target(目标) of health advocates(拥护) and parents who link it to childhood obesity(肥胖症). To get rid of its bad image, MacDonald's has made many changes on the Happy Meal over the years, including cutting the size of its fries and adding fruit.

    Recently, the company replaced its former apple juice with a new kind of juice that has less sugar. MacDonald's wants all its Happy Meal choices to have 600 calories or fewer. It also wants less than 10% of the meal calories to come from fat and added sugar. The cheeseburger and chocolate milk didn't meet those new standards. However, MacDonald's is trying to cut sugar from chocolate milk and believes it'll be back on the menu eventually.

    There will be other changes. For example, bottled water will be added as a choice to the menu, but it will cost extra. Currently, the Happy Meal menu lists milk, chocolate milk, and apple juice.

    For international restaurants, MacDonald's said that a least half of the Happy Meal choices available must meet the new standards. Some MacDonald's restaurants are adding new menu items to obey. For example, In Italy, a grilled chicken sandwich was added to the Happy Meal menu.

Inventor, physicist, surveyor, astronomer, biologist, artist... Robert Hooke was all these and more. Some say he was the greatest experimental scientist of the 17th century. In the course of his work, he cooperated with famous men of science like Isaac Newton, and the great architect, Christopher Wren.

Hooke's early education began at home, under the guidance of his father. He entered Westminster School at the age of 13, and from there went to Oxford, where he came in contact with some of the best scientists in England. Hooke impressed them with his skills at designing experiments and inventing instruments. In 1662, at the age of 28, he was named Curator of Experiments at the newly formed Royal Society of London — meaning that he was responsible for demonstrating new experiments at the society's weekly meeting. Hooke accepted the job, even though he knew that the society had no money to pay him!

Watching living things through a microscope was one of his favourite pastimes. He invented a compound microscope for this purpose. One day while observing a cork under a microscope, he saw honeycomb­like structures. There were cells — the smallest units of life. In fact, it was Hooke who invented the term "cell" as the box­like cells of the cork reminded him of the cells of a monastery．

Another achievement of Hooke's was his book Micrographia, which introduced the enormous potential of the microscope. It contains fascinating drawings of the thing he saw under the microscope. The book also includes, among other things, ideas on gravity, light and burning that may have helped scientists like Newton when they were developing their own theories on these phenomena.

Hooke made a valuable contribution to astronomy too. A crater on the moon is named after him in honour of his services to this branch of science.