In France, a man walks on what can only be described as a human-sized hamster wheel. The wheel moves around and around, as the man keeps walking. What is he doing? He is lifting a heavy object to the top of a tower the same way workers moved such objects 800 years ago.

    In the 13th century, workers did not have the 100-meter tall cranes they now use to build tall buildings. So they had to be creative and come up with simple machines to get their work done.

    The man on the large wheel is walking at a reasonable speed. The wheel turns and pulls a rope connected to a pulley(滑轮)at the top of the tower. Another rope tied to the pulley lifts supplies from the ground.

    This is just one way skilled craftsmen arc building a 13th-century castle without using modern tools. Crew have been working on the castle since 1997. It is being built in the Burgundy area of central France. Organizers expect the work to last another 10 to 15 years. That means it will take close to 30 years to finish the project.

    The crew are making progress at about half the speed of the workers from 800 years ago. That is because many of them are accustomed to using modern tools. When the crew use heavy chisels(凿子）and hammers to break rock, as they did hundreds of years ago, they are learning as they go. The goal of the project is to learn more about old building techniques in case they might be of use today.

    Clement Guerard, 44,is a stonemason; he cuts and builds with stone. He has been working on the tower for 17 years. He said one way he is able to work on something like this for so long is by forgetting “some of the pace of modern life", he is able to adapt to working by hand.

    I've learned that you have to make the choice if you want to get anywhere. If you just let other people decide what is going to happen for you, then all your goals and dreams may never be achieved.

    Everyone always says that studying abroad in college can change your life. I made the decision to experience it for myself during my junior year. I chose to study in the Dominican Republic. As it got closer to the deadline, an advisor told me I had received a scholarship from an alumni (校友) family foundation.

    During my first semester in the country I fell in love. I was becoming bilingual (双语的) but also learning so much about a new culture. I had begun working with a local grassroots organization, taking part in a project supporting an underdeveloped community just outside the city. My main role was to become aware of the issues facing populations such as these and support community education. I was in no way ready to leave this new life. I felt as if I needed more time to get what I wanted.

    As the next semester began, I realized again that I needed to take a chance. I got involved with a local boarding school for girls living in poverty. I first approached the head of the school to volunteer to teach music classes, asking for money from my college church. I could have never predicted the results of this small action. Another volunteer and I were able to put together a benefit (义演) to show off what the students had learned. We invited community members, friends and other students from local universities to support the girls. We also sold art that the students themselves had created to increase the funding (资助) of the arts program. I felt good when I left, knowing that I had laid the foundation for a good cause and bettered the lives of young girls.

    There will always be people that think they know what is best for you, but you ultimately know what you want in life. My time in the Dominican Republic changed my life by giving me the realization of how fortunate I am and the fact that there is always a chance to give back. You have to go after anything and everything you desire or there may be a missed opportunity. My trip to Santo Domingo taught me to take advantage of new possibilities.

B

    When I was 17, I read a magazine article about a museum called the McNay, once the home of a watercolorist named Marian McNay. She had requested the community to tum it into a museum upon her death. On a sunny Saturday, Sally and I drove over to the museum. She asked, "Do you have the address? ""No, but I'll recognize it, there was a picture in the magazine. "

    "Oh, stop. There it is!"

    The museum was free. We entered, excited. A group of people sitting in the hall stopped talking and stared at us.

    "May I help you?" a man asked. "No," I said. "We're fine." Tour guides got on my nerves. What if they talked a long time about a painting you weren't that interested in? Sally had gone upstairs. The people in the hall seemed very nosy(爱窥探的), keeping their eyes on me with curiosity. What was their problem? I saw some nice sculptures in one room. Suddenly I sensed a man standing behind me. "Where do you think you are?" he asked. I turned sharply. "The McNay Art Museum!" He smiled, shaking his head. "Sorry, the McNay is on New Braunfels Street." "What's this place?" I asked, still confused. "Well, it's our home." My heart jolted(震颤). I raced to the staircase and called out, "Sally! Come down immediately! "

    "There's some really good stuff(艺术作品）up there."She stepped down, looking confused. I pushed her toward the front door, waving at the family, saying, "Sorry, please forgive us, you have a really nice place." Outside, when I told Sally what happened, she covered her mouth, laughing. She couldn't believe how long they let us look around without saying anything.

    The real McNay was splendid, but we felt nervous the whole time we were there. Van Gogh, Picasso. This time, we stayed together, in case anything else unusual happened.

    Thirty years later, a woman approached me in a public place. "Excuse me, did you ever enter a residence, long ago, thinking it was the McNay Museum?"

    "Yes. But how do you know? We never told anyone. "

    "That was my home. I was a teenager sitting in the hall. Before you came over, I never realized what a beautiful place I lived in. I never felt lucky before. You thought it was a museum. My feelings about my home changed after that. I've always wanted to thank you."

    Good health is the most valuable thing in the world. When you've got it, you never think about it. When you haven't got it, you think about it all the time. Our biggest enemies are not terrible diseases and so on. We are our own biggest enemies because we sometimes destroy our own good health. Some of us eat too much, drink too much and smoke too much. And though our reason tells us we should control ourselves, we find it difficult. The fact is that most human beings need stimulation (刺激). Who doesn't enjoy a drink after a busy day? Only a smoker knows the pleasure of a cigarette with a cup of coffee.

    The danger is when these innocent pleasures run our lives and so destroy our health. When you find yourself eating between meals or eating too much rich food, when you can only keep yourself going by taking frequent drinks or by smoking one cigarette after another, then it's time to stop and think what you might be doing to yourself. The funny thing is that when we don't control ourselves, simple pleasures are no longer simple pleasures.

    All right, I know what you're thinking. You're probably saying, “It's easy to say, but I can't help myself. I need that extra bit of food, that extra drink, that extra cigarette. Life has so many pleasures that I can't do without them.” But I'm saying you can help yourself. Not only that, you must help yourself. Because if you don't help yourself, no one else can. So be your own best friend.

    Please Choose Cloud Services

    May be unsure, or you do not know where to begin. Trying every Cloud service would take a lot of time and work. But, the website Reviews.com might help.

    One valuable feature is the protection of digital files, including photos, videos, documents, music and more. If the worst happens and your computer crashes, or gets lost or damaged, your files can still found in the Cloud.

    Cloud services let you access your files from almost anywhere. No need to worry about a file stored on your computer when you are away from your desk. If you have an Internet connection, you can open your files from any computer, or from a phone, when they are stored using a Cloud service.

    Using a Cloud service makes sharing files easier. If you send documents to a group using emails, you may then wonder which version everyone is working with. When sharing files using a Cloud service, everyone will see the same document and the latest version.

    The first thing to consider is the amount of storage space you need. Check how much space you are currently using on your computer and mobile devices. If your computer or phone is filled with photos and you have little free space, you may want to move your photos to the Cloud. Some Cloud services are free. But, if you need a lot of space, you will probably need one that costs money.

    Even if everyone you have ever met is a Windows user, you still probably want a Cloud service that works with many platforms. You might become friends with an Android user or start a job with a company that computers on Apple!

More than 100 scientists traveled to faraway places to collect wild crop seeds in an effort to help battle climate change. The scientists have been likened to the hero of the Indiana Jones movies. Like him, they had to face blood-sucking creatures and fierce tigers. Some-times, they had to use elephants for transportation because they couldn't find any other means of transportation.

A report on the project was published last week. It described the results of a six-year search to collect thousands of wild seeds. The seeds could be important in feeding a growing human population at a time when rising temperatures are affecting crop production in some areas.

The scientists traveled on foot, by four-wheeled vehicles, boat and riding horses and they even rode elephants to reach faraway areas. They collected 4,644 seed samples of 371 wild relatives of 28 crops. Many of those wild relatives are said to be endangered.

The Crop Trust, a nonprofit organization that works to save different kinds of crops, was directing the project. The group was working in partnership with Britain's Royal Botanic Gardens and Millennium Seed Bank. Additional financial support came from Norway. The project is believed to be the largest organized international effort yet to collect and protect crops' wild relatives.

Some relatives of widely grown crops have developed so they can survive usual and severe conditions such as low rainfall, flooding, extreme temperatures and poor soils. Scientists say the wild crops offer a largely unused source of diversity for protecting crops against climate change.

Some crops are threatened because of destruction of forests, conflict and expanded cities. Experts say losing this diversity could endanger food security around the world. A United Nations report says that food supplies are under severe threat. The report notes that the number of animal and plant species are quickly disappearing as the world deals with how to feed a rising population.