Stress(压力) is everywhere in our everyday life. Not only men but also women and young people have it. The most important reasons of stress are: diseases, exams, making money, getting married, moving houses, changing jobs, ending friendships and so on.
How do you know whether you have stress? Give your answers to the following questions?

If you answer “Yes” to more than two of these questions, you are one of those people with stress. So what can you do about it? Doing relaxing exercises, talking with friends and listening to light music are all usual ways of relieving(减轻) stress. However, doctors now say that there are easier ways — people should laugh and smile more often. When you laugh and smile, your body relaxes. They also say that people, especially men, should cry more often, because crying is the natural way of relieving stress.

    Scientists have always believed that snails are not able to find their way home. But Briton Ruth Brooks, a retired teacher, has found that it is not true.

    Brooks began an experiment on snails after she got mad with the snails in her garden.

    The snails had eaten her vegetables. She didn't want to kill them, so she took them to another place. But she found they always seemed to come back.

    Brooks did an experiment. She marked the snails in her garden with nail polish(指甲油).

    She placed the snails in the area around her home and made notes of their movements.

    She found that snails have a strong homing instinct (本能); the longest returning snail traveled back 90 meters. Brooks has been named Britain's best amateur (业余的) scientist after her work won the BBC Radio 4 project, So You Want To Be A Scientist.

    She said, "I've always wanted to know whether the snails that eat my plants just come back when I move them, and if they do, what is their homing distance?

    "I would say on the evidence (证据) that it would be safe to take your snails away beyond 100m or even further. If you put them somewhere nice with some food, you can be almost certain that they won't come back."

    How much sleep do we need? We are all different. Some people need only three hours of sleep a night. Others need ten hours of sleep a night. Most Americans sleep an average(平均) of seven to eight hours a night. After the age of fifty, the average sleeping time goes down to 6.5 hours a night.

    Most people have a bad night when they cannot fall asleep(睡着). The name of this problem is called insomnia.

    This isn't a new problem .Many famous people in history had insomnia .Some of these people had special ideas to make them sleep .Benjamin Franklin, the famous inventor had four beds. He moved from one to another to fall asleep .King Louis XIV(国王路易十四)of France had four hundred and thirteen beds and hoped to fall asleep in one of them .Mark Twain, the famous American writer, had a different way. He lay on his side across the end of his bed.

    What can 3-D printers*make? They can make lots of things, such as toys and car parts. But what about a house? In the Netherland 3-D printed houses will soon come into life, according to The Guardian

The Netherlands is the first country to have this technology*.

    Scientists plan to build five houses with 3-D printers. The first house will be finished by the end of 2019. It will be a house with three bedrooms. For the first house, only the walls will be 3-D printed. A 3-D printer will print it with a special cement. The printer will print it layer upon layer to build the walls. After that, workers will make the wall stronger.

    By the time they start working on the fifth house, the scientists hope that most parts of the house will be made with 3-D printing. Even the windows can be made with a 3-D printer.

    The 3-D printed houses have many advantages. For example, they use less cement than traditional houses. It can help save a lot of money. Also, 3-D printing can make buildings in almost any shape*. Traditionally-built homes usually come in just a few shapes

    Do you like pandas? Now you can watch them eat and play at iPanda. com 24 hours a day.

    The panda is a symbol of China. There are only about 1, 600 pandas in the wild(野外). You can also see them in the zoos of many countries like the US and the UK.

    Pandas have big black eyes and fat bodies(身体). When they eat, they sit on the ground and hold the food with two hands, just like children. They look very cute and funny.

    Pandas usually live for 30 years. Now many pandas in the wild have no food to eat. They are in danger and they need our help.