As we know, DNA testing is very useful for crime fighting. But now crime fighters could have a new tool at hand. Researchers have developed a cutting-edge (前沿的) technique to identify human hair. Their test is quicker than DNA analysis techniques currently used by the police.

    DNA testing is commonly used for identification because DNA is unique to each individual. However, environmental and chemical processes can degrade(降解) DNA, limiting its usefulness over time. Protein (蛋白质) in hair, on the other hand, is more stable than DNA but can also have variations (变异体) that may be unique to the individual.

     “Our analysis process can be used universally,” says Ms. Huang, “One of our samples even included dyed hair and the test was 100 per cent accurate. The test was able to distinguish East Asians, Caucasians and South Asians.”

    Dr. Beauchemin says she has got in touch with law enforcement agencies about using the new technology. She is also planning to collect more hair samples and continue her research with a goal of finding where exactly in the world hair sample is from, to look for more races and determine specific age.

     “We are in a very similar place with protein-based identification to where DNA testing was during the early days of development,” said chemist Brad Hart. “This method will be a game-changer, and while we've made a lot of progress toward improving it, there are steps to go before this new technique is able to reach its full potential.”

    At least 35 percent of Beijing households will be covered by family doctor service at the end of this year. All local households will enjoy the service as of 2020, according to the Municipal Health and Family Planning Commission.

    It is good that Chinese communities can expect more general practitioners(从业者)，who do not specialize in any particular area of medicine but who are able to treat the general health problems for people of all ages. By the end of last year over 8 million residents in Beijing had reportedly signed up for family doctor services, accounting for more than 40 percent of the city's permanent population.

    Since 2009 China has launched scores of programs nationwide to ensure citizens have fairer access to elementary public health services ，among which the introduction of family doctors has been one of the most successful. Some regions have issued guidelines on the promotion of the family doctor service. And four months ago, Premier Li Keqiang said in this year's Government Work Report that the service should cover at least 85 percent of the Chinese cities this year.

    The expanding coverage, however, may not guarantee more residents will be offered quality medical services.

    Family doctors in some places rarely visit the families they are assigned to, and some of them have been struggling to solve patients problems either because of their unfitness or because they have too many households to attend to. In some cases, a family doctor might be assigned to see hundreds of residents a day.

    That highlights the need to better the arrangement of medical resources and to offer proper encouragement to family doctors, who should get patients to make appointments rather than employ temporary arrangements.

    Indian-origin Anvitha Vijay has given a new meaning to the phrase “age is just a number”; she has proved that achievements and knowledge follow passion and not just age and experience.

    Vijay, who lives with her parents in Melbourne, Australia, at the age of seven realized that her piggy bank did not have enough money to hire a developer to make her an app, so she decided to teach herself how to code. With the help of YouTube videos, the young techie learned to code. For one entire year, she watched multiple coding tutorials on the web and became a programmer herself.

    Vijay's inspiration for developing the apps was her little sister, who was still learning to talk. Therefore, Vijay developed an educational app for children that were her sister's age. The app is called Smartkins, which uses about 100 sounds and flashcards of different animals that help children learn and identify. Later, Vijay developed a similar iOS app for children to identify and learn colors. Each app has been downloaded thousands of times.

    Anvitha's skills won her a scholarship to attend a big tech conference hosted by Apple in San Francisco, California. There, she got tips from the pros. She went to workshops where she learned about the latest software for app building.

    All that training led to an idea for a third app. This one, called GoalsHi, inspires kids to practice good habits. Users are rewarded for achieving goals, such as eating their vegetables or practicing piano. Anvitha says the rewards are like getting a sticker for a job well done.

    Anvitha's goal is to continue creating technology that helps kids learn while having fun. But even more important to her is that the world sees the power of technology in kids' hands. “The more training we get in tech at an early age,” she says, “the better chance we have of becoming creativity champions who will one day change the world.”

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    I attended a party one night. During the dinner a man told a humorous story based on the quotation: "There's a divinity that shapes our ends, rough-hew them how we will."

    The storyteller mentioned that the quotation was from the Bible. I knew he was wrong. There couldn't be the slightest doubt about it. To get a feeling of importance and display my superiority, I appointed myself as an unwelcome committee member to correct him. He stuck to his guns. "What? From Shakespeare? Impossible! Absurd! That quotation was from the Bible." And he knew it.

    The storyteller was sitting on my right; and Frank Gammond, an old friend of mine, was seated on my left. Mr. Gammond had devoted years to the study of Shakespeare. So the storyteller and I agreed to submit the question to Mr. Gammond. Mr. Gammond listened, kicked me under the table, and then said, "Dale, you are wrong. The gentleman is right. It is from the Bible."

    On our way home that night, I said to Mr. Gammond, "Frank, you knew that quotation was from Shakespeare. "Yes, of course," he replied, "Hamlet, Act Five, Scene Two. But we were guests at a happy time, my dear Dale. Why argue with the storyteller? Why prove to him he is wrong? Why not let him save his face? Always avoid your sharp angle." I learned a lesson I'll never forget. I not only had made the storyteller uncomfortable, but also had put my friend in an embarrassing situation. How much better it would have been had I not become argumentative.

    Nine times out of ten, an argument ends with each of the contestants more firmly convinced than ever that he is absolutely right. You can't win an argument. You can't because if you lose it, you lose it; and if you win it, you lose it

Earthquake rescue robots have experienced their final tests in Beijing.Their designers say with these robots，rescuers will be able to have more time to save more lives during an earthquake.

This robot，looking like a helicopter，is called the detector bot.It's about 4 meters long，and it took about 4 years to develop the model.Its main functions are to collect information from the air，and send goods of up to 30 kilos to people trapped by an earthquake.

This robot has a high－definition 360－degree panoramic(全景的) camera.It can work day and night and will also be able to send the latest pictures from the quake area.

Dr.Qi Juntong，from the Chinese Academy of Science，said，"The most important feature of this robot is that it doesn't need a distant control.We just set the destination(目的地) information on it，and then it takes off，and lands by itself.It flies as high as 3，000 meters，and as fast as 100 kilometers per hour."

This robot has a different function—it can change as the environment changes.Its main job is to search for any signs of life in places where human rescuers are unable to go.

As well as a detector(探测器) that finds victims and detects poisonous gas，a camera is placed in the 40－centimeter－long robot，which can work in the dark.

Another use for the rescuers is the supply bot.With its 10－meter－long pipe，people who are trapped in the ruins，will be able to get supplies including oxygen and liquids.

Experts have said that the robots will enter production，and serve as part of the national earthquake rescue team as soon as next year.