With the development of technology, WiFi is becoming more and more popular and important in people's daily life. But have you ever experienced it? Just imagine what life will be like if there is no Internet. Maybe you won't be able to talk with friends, play video games or search for information for your homework on the Internet.

    But in fact, only one third of the world's population are able to get information on the Internet. The rest are too poor to buy WiFi access(使用权) or they live in remote areas. As a result, they live without the Internet.

    Google and Facebook, two world-famous technology companies, have decided to do something about it. Google's Project Loon will try to send balloons which are 15 meters wide into our Earth's stratosphere (平流层) in 2015. The balloons are made of a special material that is three times thicker than the plastic bag we use every day. Each balloon will carry a minicomputer and a WiFi radio. The WiFi radio will send the Internet over the areas it is floating over. Then people can get up-to-date information on weather or news.

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Hover Camera(无人相机)

    Wang Mengqiu, the inventor of Hover Camera, was born in Hangzhou in 1982. He once studied at Stanford University in the United States. He became famous overnight(一夜成名) because of the invention.

    Forget selfie sticks(自拍杆)! Compared to other cameras, Hover Camera has many advantages.

    *It can fly and stay in mid-air, track your face and even follow you to make sure it gets the perfect picture.

    *It can be controlled by using a smartphone(智能手机).

    *It records movements with a 13MP camera and takes 4K video.

    *It is the best choice for weddings, sports games and holidays.

    Mr. Wang also said: “The main design consideration is easy and safe to take for the users. It's very light and small. It can be folded(折叠) in two, so it can be easily put into a bag. When the power is low, it can land on the ground safely on its own.”

    It's reported that the company has raised $ 25 million to produce it. As it is still being tested(测试), Hover Camera can be bought later this year.

The price has not yet been decided. But a spokesman says the company hopes to sell it for less than $ 600.

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    There is good and bad news about the number of trees on out planet. The good news is that there are seven times more trees for everyone than we thought.

    A few years ago, scientists believed that the world bad 400 billion（十亿）trees. However, a new study from Yale University shows that there are around three trillion（万亿）trees. Thatmeans a three followed by 12 zeroes. That means there are about 420 trees for everyone in the world today.

    The bad news is that thousands of years ago, the earth had six trillion trees. Humans cut in half the number of trees on the planet. Take Europe for example, it was a large forest thousands of years ago. Now much of it is cities and towns. And another 15 billion trees are lost each year.

    Dr. Thomas Crowther is one of the scientists from Yale University. He said the new number of trees from their study would change nothing. " The study only shows we need to do more to protect our forests." He said.

    Populations of white-tailed deer (白尾鹿) are growing rapidly in many parts of the United States. As populations grow, food becomes a problem. Many deer die of hunger. Others grow up small and unhealthy. In search of food, hungry deer move closer to where humans live. They eat farm crops, vegetables and even trees. Besides, increased numbers of deer near roads can cause traffic accidents.

    People admire the grace and fast speed of deer. Most people don't want these animals to be hungry and ill. Should people take action to control the growing deer populations?

Should People Take Direct Action?

    Many people think that hunting (打猎) is the best way to control the animal populations. Wildlife managers will see if there's enough food in an area and decide its carrying capacity (容量). Then hunters with licenses are sent to help control the number of deer. Hunting is usually not allowed in cities or suburbs, however.

    Some people have the idea to catch the deer and move them to other places. But this method is expensive and requires finding another place that can accept the deer without breaking the balance of ecosystem.

    Scientists are also working to develop chemicals to control the birth rate in deer populations. But this plan works for only one year at a time.

Should People Take Indirect Action?

    Some suggest bringing in natural enemies of deer, such as wolves, lions and bears, to areas with too many deer. But these animals could also hurt dogs, cats, and even humans. Other communities have built tall fences (篱笆) around areas to keep out the deer. However, this is impossible for farmers.

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    Some people are against any kind of action. They support leaving the deer alone. Animal populations in an area naturally go up and down over time. Doing nothing means that some deer will die of hunger or illness. But finally, the population will reach a size within the carrying capacity of the environment. So, let nature go its own way.

    What do you see when you look at abstract (抽象的)art? Can you understand it? Does it look like anything?

    Abstract art became popular in the early 20th century. Artists did not want to paint, draw, or sculpt things exactly like they looked. They didn't want their art to be realistic(现实的). They were more interested in basic shapes and colours.

    Picasso is probably the most famous of these artists. He painted and drew in many, many styles. Sometimes he used a lot of blue colours (his "blue period"). Later, he used more red and pink colours (his "rose period"). Many of his other paintings are called "cubist (立体派的)" because they are made of painted squares.

    After a long time, Picasso's paintings became more and more abstract. He painted people and things using strange shapes. His work was so strange that many of his workmates didn't understand it.

    Kandinsky, another famous artist, used lines, shapes, and patterns to paint his subjects. His paintings also used strong colours to express feelings. Other artists like the surrealists (超现实主义画家)，were interested in subconsciousness (潜意识). Painters like Breton and Magritte used many symbols in their work. The meaning or subject of their work wasn't always clear. Dali, another surrealist artist, painted pictures that looked like dreams.

    There are still many abstract artists around the world. That's the way many artists prefer. They want each person to look at art and find their own meaning in it.