Using technology, of course. While special services via webcam(摄像头) and cheating detecting software have been developed now, Mettl, an online company, has developed advanced techniques for netting cheaters, which the company claims are even more reliable and easier to use. Whatever small attempt to cheat, he or she will be found out.

    Mettl has adopted a handful of technologies on its test—taking platform, creating a mini monitoring state in an exam. Here's how it works: A test-takersigns on to Mettl and selects hisher exam from the site's library of pre—loaded tests. Facial and keystroke recognition technology confirm the person that has signed in is the very person, and the system records both the test—taker(through the webcam)and the test—taker's screen throughout the test.

    Mettl's technology uses the test—taker's webcam to detect how many people are using the computer. Soon, it will track eye movement well enough to sense whether the test-taker is looking away from the screen, perhaps to Consult a smart phone or a friend in secret. Mettl also monitors the test-taker's screen and can detect when the test-taker has changed a computer or moved from the test. The system will soon be able to record sound, thus detecting whether the test-taker is talking or being talked to.

    If any irregularities are detected, the system flags the incident and reports it back to the test's administrator. This can bring any number of things, depending on the test-giver's wishes: a completeshutdown of the exam, a warning message that appears on the test-taker's screen, even human instructions from the control center.

    Mettl is hoping its technology will help it break into the country's big MOOC markets.

    In January, 2016, Harry Styles made a bold decision. He left the popular boy band One Direction and went solo (单飞). Now he is making his own voice heard. The 23-year-old British singer released his first solo single called Sign of the Times. His self-titled album (个人同名专辑) is coming out on May 12.

    Going solo is a journey for him to find his identity (身份). Though at the time, he was uncertain about his future, he kept a word in his mind - “honesty”. “I didn't want to write ‘stories',” he told Rolling Stone. “I wanted to write my stories, things that happened to me. The number-one thing was I wanted to be honest. I hadn't done that before.”

    He is indeed full of stories since beginning his solo career. Last fall, he spent two months recording on a remote island in Jamaica (牙买加).Along with some musicians, he filled a two-floor house with instruments. They hung out at the bar that looked like a tree house. Many mornings began with a swim in the river down the hill. They watched many romantic comedies. Styles always held a black notebook and looked like a college student who was studying, Rolling Stone reported.

    His coming album is about rock music. In fact, he grew up with it. His father Desmond was a rock music fan. When Styles was very young, he danced to The Dark Side of the Moon, a classic song by British rock band Pink Floyd. “I couldn't really get it. But I just remember (thinking that) this is really cool.”

    Harry said, “At the very beginning, all I wanted was to be the granddad with the best stories.” Surely, now he is on the right track (轨道).

    It is true that world population is growing, but this is not the cause of our current and future global problems. Believing this will cause us to ignore the real problem and risk long-term damage to our planet.

    Let me start by explaining why overpopulation is a myth. For one thing, the UN Population Division regularly predicts population growth but provides a low variant (变量), medium variant, and high variant to factor in various possibilities. In the 2010 revision, their high variant suggests that the world population will be almost 16 billion in 2100, but the low variant predicts it will peak（达到顶峰） at 8 billion and decrease to just over 6 billion by 2100. In most cases, it is the low variant that has come true in the past, suggesting the same will be true of their future population predictions. In addition to this, the size of families is actually decreasing.

    For another, if the Earth is overpopulated, there needs to be insufficient (短缺) food, water, and space for humans to live. However, Indian economist Raj Krishna estimates that India alone is able to increase crop produce to the point of providing the entire world's food supply. The World Food Programme confirms that there is sufficient food grown to feed the world and there is the same amount of fresh water on the planet now as there was 10,000 years ago. So how is it possible that the number of people in the world is affecting our planet?

    Therefore, it is not an increase in population but an increase in consumption that is a severe threat. Materialism and overconsumption are facts of life for everybody in the western world, as possessions reflect a person's status in society and people strive to obtain happiness through owning the latest fashionable goods. Not only that, but waste is a common occurrence which has a huge effect on our resources. It is a sad truth that 80% of the world's resources are currently used by just 20% of the world's population.

    Our overconsumption must be addressed now to make our lives more sustainable and avoid continuing the terrible damage to the environment we are causing. The key is education. If we do not work towards this but instead focus on the wrong issue, we may find ourselves living on a planet that can no longer sustain human life.

    Reading may be fundamental, but how the brain gives meaning to letters on a page has been a mystery. Two new studies fill in some details on how the brains of efficient readers handle words. One of the studies, published in the April 30 Neuron, suggests that a visual-processing area of the brain recognizes common words as whole units. Another study, published online April 27 in PLOSONE, makes it known that the brain operates two fast parallel systems for reading, linking visual recognition of words to speech.

    Maximilian Riesenhuber, a neuroscientist at Georgetown University in Washington, D.C., wanted to know whether the brain reads words letter by letter or recognizes words as whole objects. He and his colleagues showed sets of real words or nonsense(无意义的词语)words to volunteers undergoing fMRI scans. The words differed in only one letter, such as “farm” and “form” or “soat” and “poat”, or were completely different, such as “farm” and “coat” or “poat” and “hime”. The researchers were particularly interested in what happens in the visual word form area, or VWFA, an area on the left side of the brain just behind the ear that is involved in recognizing words.

    Riesenhuber and his colleagues found that neurons(神经元)in the VWFA respond strongly to changes in real words. Changing “farm” to “form”, for example, produced as great a change in activity as changing “farm” to” coat”, the team reports in Neuron. The area responded slowly to single-letter changes in made-up words.

    The data suggests that readers grasp real words as whole objects, rather than focusing on letters or letter combinations. And as a reader's exposure to a word increases, the brain comes to recognize the shape of the word. Meaning is passed on after recognition in the brain, Riesenhuber says.

    The researchers don't yet know how longer and less familiar words are recognized, or if the brain can be trained to recognize nonsense words as a unit.

    Kentucky Fried Chicken has filed a lawsuit（提起诉讼） against three companies in China, because their social media accounts spread false information about its food, including that its chickens have eight legs. The case comes as the Beijing government holds an activity to clean up rumours （谣言）on social media（媒体）. Internet marketers have been accused （指控） of trying to control online opinions of their customers by posting false information about their competitors.

    In an announcement posted on its Chinese website, KFC said one of the best-known false rumours was that chickens used by the company have six wings and eight legs. It is requesting 1.5 million yuan and an official apology from each of three companies. It is also asking for an immediate stop to their activities to hurt it by spreading rumours.

    The fried chicken chain is China's biggest restaurant operator and is a kind of fast food for young people in China. It has more than 4, 600 restaurants in the country, and on average, opens a new branch every day. KFC'S China chief executive officer（行政长官）, Qu Cuirong, said that it is difficult for companies to protect their brands（品牌） against rumours because it is hard for them to collect evidence. She added, "The efforts by the government in recent years to purify（净化） the online environment have offered us much more confidence."

    The companies are Shanxi Weilukuang Technology Company, Taiyuan Zero Point Technology Company and Yingchenanzhi Success and Culture Communication in Shenzhen, south-east China. Calls to numbers listed for the companies either rang unanswered or were not available. In fact, authorities（官方） began an activity two years ago to clean up what they called online rumours. Comments in state media have argued that a clean-up is needed.

    The streets of Stockholm may be cold and snowy during winter, but it is one of the world's hottest startup(创业) centers and a good choice for people with talent worldwide.

    Once the snow melts(融化) in early spring, the city is among the greenest in the world. Two thirds of Stockholm is made up of either water or parks, and locals make it the first thing to enjoy these peaceful surroundings. Less than l% of Swedish employees work more than 50 hours per week.

    The quality of life is important. New parents are given 480 days of leave to look after their babies, while childcare is heavily supported in various sides. Little wonder that Sweden was rated the best location in the world for family life. Adam Webb, 34, a British businessman and father-of-one, said, "Everything is set towards helping parents, from giving dads time off on almost full pay to free bus rides for anyone with a baby carriage."

    Stockholm is also proud of what Vogue magazine recently ranked as Europe's coolest neighborhood. On the island of Sodermalm, just south of the city centre, independent record stores still make money, while plenty of cafes offer a taste for Scandinavia's love affairs with timeless style.

    Many major international companies, including H&M and Ericsson, offer expats(外来者) accommodation for the first three months of their contracts(合同) in Stockholm. But other foreigners arriving in the city are left to battle with a unique property market and a shortage of apartments. More than a third of Swedes live in rented housing, half of which is owned by local governments or state rental companies. If you're lucky enough to get a firsthand contract for this kind of accommodation, it is yours for life. Expats are welcome to join the queue, but in Stockholm they will find around half a million locals in front of them and an average wait of nine years.

    "Finding a place to live is the single biggest challenge when moving to Stockholm, but there is a lot going on to try and solve the problem," said Julika Lamberth from Stockholm Business Region, a state-funded company working to increase investment in the city.