Do you like drinking coke, coffee, juice or milk? Do you often drink them instead of water? However, of all the things we eat and drink, water is the most important. Not all of us understand this but it is quite true. Human body can go without food for a long time, but two or three days without water usually makes people die.

    Many people do not understand how much water the human body needs to work well. What is true is that many people do not drink enough, especially in hot weather. Most people drink only when they are thirsty but often need more water after they take exercise.

    Does anyone know what is the 65%-75% of human body? It is water. If we do not have enough water, we will feel tired and become ill. So, do you know what the best drink is? It's water.

    Different weather makes people feel different. It has an effect on health, intelligence（智力）and feelings.

    In August, it is very hot and wet in the southern part of the United Stated. People there have heart trouble and other kinds of health problems during this month. In the Northern and the Middle West, it is very hot at some time and very cold at the other times. People in these states have more heart trouble after the weather changes in February or March.

The weather can also influence intelligence. Fox example, in a 1983 report by scientists, IQ (智商) of a group of students was very high when a very strong wind came, but after the strong wind, their IQ was 10% lower. The wind can help people have more intelligence. Very hot weather, on the other hand, can make it lower. Students in many schools of the United States often get worse in exams in the hot months of the year (July and August).

    Weather also has a strong influence on people's feelings. Winter may be a bad time for thin people. They usually feel cold during these months. They might feel unhappy during cold weather. But fat people may have hard time in hot summer.  At about 18℃, people feel more comfortable.

    Are you feelings sad, tired, or unhappy today? It may be the weather's problem.

    AI (人工智能) makes our lives easier and better. Let's see the amazing AI.

    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

    The American Computer &. Robotics Museum was open to visitors in 1990 in Bozeman, Montana. At first it was planned to build in Princeton, New Jersey. The founders moved to Bozeman in 1988 and after looking at the area they decided to build the museum there. With Yellowstone National Park to the south and Glacier National Park to the northwest, the museum attracts thousands of visitors from all 50 states and over 50 countries. The American Computer &. Robotics Museum has been written about in many publications such as The New York Times, The New Yorker, Los Angeles Times, QST and USA Today.

    When visitors first enter the museum, they are shown a video introducing the museum and its collections. All visitors are given the chance to join in tours led by friendly tour guides. We have had visitors aged from3 to 93- it is a big family. Over 1,000 exhibitions are shown in the 6, 000-squaremetre museum. Travelling through our museum, you will see the exciting 20,000 years of history of the information age. Technology becomes easier to accept when one learns about its origins(起源) in the natural process(进程) of human development.