Soon computers and other machines will be able to remember you by looking at your eyes! The programme works because everyone's eyes are different. So in the future you won't have to remember a number when you want to use a machine or take money out of a bank. You'll just have to look at the machine and it will be able to tell who you are.
The eye-recognition programme is already being tested in shops and banks in the USA, Britain, Spain, Italy and Turkey. Soon, this technology will take the place of all other ways of finding out who people are.
However, scientists are working on other systems. Machines will soon be able to know you from the shape of your face or hand or even your smell! We already have machines that can tell who you are from your voice or the mark made by your finger.
Eye-recognition is better than other kinds because your eyes don't change as you get older, or get dirty like hands or fingers. And even twins have different eyes, so the programme can be up to 94％ correct, depending on how good the technology is. Some programmes may only be right  51％ of the time. In Britain, it was found that 91％ of people who had tried it said that they liked the idea of eye-recognition. In the future your computer will be looking you in the eye. So smile!

Computer

    There are all kinds of machines. They are used in many different ways. One kind of machines is called computer. A computer can do many things. A computer can do maths problems. People can do maths problems,too. But they can't do it as fast as a computer. Computers remember things. Computers remember everything people tell them. People can not remember as many things as computers. Computers help to tell what the weather will be like. Computers help to fly rockets and spaceships.

    There are a lot of ways computers are used. They are used in thousands of ways. But they are not alwaysused in the same way. Some computers do just a few things. Some computers can do a lot of things. There are huge (巨大的) computers. There are small computers, too. There may be computers in your school. Do you know what they do?

    The world got a glimpse(一瞥) of one of the greatest mysteries of our universe(宇宙) on April 10.

    That′s when the first image of a black hole was shown to the public. The picture was created by a network of eight radio telescopes(射电望远镜).

    "We have seen what we thought was unseeable, "says Shep Doeleman. He led the effort to create the image.

    The black hole is at the center of galaxy (星系)named Messier 87, some 55 million light﹣years from the earth, and is 6.5 billion times the mass of the sun.

    The image shows the gas, dust, and stars that move around the black hole before disappearing into it. It does not truly show the black hole, because not even light can escape its gravity. Black holes, like vacuums, suck(吸)in everything that gets too close.

    Humans have learnt many things from nature. These things have helped us in our daily life. The latest thing is self-repairing clothing.

    Scientists have developed a special way for clothing to repair rips and tears by itself, without the need for sewing. It works with materials such as cotton, linen and wool. The scientists are from the Naval Research Office and Pennsylvania State University in the USA. Scientists Dr Walter Dressick and Dr Melik Demirel looked at how a squid can cling on to things so well. The research team found a protein in the rings of teeth that cover the suckers on a squid. The protein is similar to the one found in the silk that spiders use to make spider webs. It is very strong and elastic.

    The new protein has been developed as part of a coating, which is put on clothes. When the coating is dipped in water, the area around the rip or tear joins together in less than a minute. This could help clothes last longer and save money for us. It could also be useful for military and survival clothes. People like soldiers and mountaineers would be safer if they had clothes that could be repaired quickly and easily. Professor Demirel spoke about the invention. He said," The coatings are thin, less than a micron, so they wouldn't be noticed in everyday wear." Then he added, "Even thin, they increase the overall strength of the material. For the first time, we are making self-healing textiles."

    Paulina Cortes is a teacher in San Jose, California. One day, she handed out masks (面罩) to farm workers in Lodi. She volunteered to do this because the air quality (空气质量) is still poor after a big fire.

    "I just got home and feel really tired now. Today I spent my day in Lodi handing out masks to farm workers," she wrote on the Internet. "I raised some money. Then I drove through San Jose and all the way to Salinas to buy enough masks I needed. This is important. The story here isn't that I handed out masks; it's that there are hundreds of people who are working in dangerous environments with no protection (防护). And no one even knows about it."

    Paulina also put some photos on the Internet, and they were picked up by the news. Many people were surprised at the news, and they knew what happened to those farm workers for the first time.

    The next day, Paulina added, "I traveled through Lodi and Stockton not just to hand out masks, but to help the farm workers understand the pollution. In Lodi yesterday the workers were picking fruit in such dangerous environments. None of them even knew this. Not too far from our homes, hundreds of people are working in these environments. I will buy more masks and send them to a Stockton farm worker. He helped me hand out masks yesterday."

    Thank you, Paulina, for caring and trying to make a difference.

    Almost every Chinese can recite the famous poem, "Every grain on the plate comes from hard work(谁知盘中餐, 粒粒皆辛苦)."But sadly, many of us don't actually get the real meaning of these lines：Don't waste food.

    A CCTV programme, News One Plus One, reported that the food Chinese people throw away every year is enough to feed 200 million people for a year.

    Do we have too much food? No, according to the UN World Food Programme, there were 925 million hungry people around the world in 2010, especially in developing countries.6 million children die of hunger every year.

    Chinese people are well-known for being generous. Many even feel that they will lose face if their guests have eaten all the food on the table.

    Luckily, a number of people have realized the importance of saving food. In November, 2011, Li Hong, a waitress in a restaurant in Nanjing, became famous because she took some leftover(剩余的)food home for her son. Many people stood by her side and agreed that it was not right to waste food.

    What should we do in our daily lives to save food? Here are some tips：

    Do not order too much in a restaurant. Only order what you want to eat. If you cannot eat all the food you ordered, take the rest of it home.

    Don't be too picky(挑剔的)about food. Some food may not taste great, but your body needs it.

    Keep an eye on what food you have at home. Don't buy too much, especially vegetables and fruit.