While the U.S. is still debating about getting rid of the penny, Sweden is rapidly moving towards abolishing currency altogether. Though this may sound radical(过激的), it is a natural evolution in this digital society.

    Sweden, which was the first European country to introduce banknotes in 1661, has just been working harder to convince its residents that digital payments are a safer alternative to carrying cash.

Over the years, the idea has gained popularity with residents, especially the younger generation that is much more comfortable with technology. Today many banks don't even have ATMs and some have stopped handling cash altogether!

    Tickets to ride public buses in most Swedish cities can only be purchased via cell phones. Numerous businesses are also moving towards accepting only digital payments. Even the homeless that sell street paper to make ends meet have to start accepting this mode of payment!

But despite its growing popularity, some people don't like this radical idea. They include the homeless, elderly people as well as those living in rural areas who are still uncomfortable with mobile phones and computers. But the officials are confident that in the very near future, they will be able to convince everyone to move this safe and more cost-effective payment system.

    Sweden is not the only country trying to abolish paper currency and coins. The movement is rapidly gaining ground in Denmark and Finland as well. In 2014, Israel announced a three-step plan to go cashless and just last week the vendors(小贩)of a popular street in Sydney declared they would stop accepting currency from customers. Whether this phenomenon spreads remains to be seen. But one thing is for sure—With increasingly advanced payment systems being introduced every day, pulling out cash is rapidly becoming “uncool”.

    Along the river banks of the Amazon and the Orinoco there lives a bird that swims before it can fly,flies like a fat chicken,eats green leaves,has the stomach of a cow and has claws（爪）on its wings when young.They build their homes about 4.6m above the river,an important feature（特征）for the safety of the young.It is called the hoatzin.

    In appearance,the birds of both sexes look very much alike with brown on the back and cream and red on the underside.The head is small,with a large set of feathers on the top,bright red eyes,and blue skin.Its nearest relatives are the common birds,cuckoos.Its most striking feature,though,is only found in the young.

    Baby hoatzins have a claw on the leading edge of each wing and another at the end of each wing tip.Using these four claws,together with the beak（喙）,they can climb about in the bushes,looking very much like primitive birds must have done.When the young hoatzins have learned to fly,they lose their claws.

    During the drier months between December and March,hoatzins fly about the forest in groups of 20 to 30 birds, but in April,when the rainy season begins,they collect together in smaller living units of two to seven birds for producing purposes.

    Recently I had a conversation in Beijing with an adult Chinese friend who was complaining how difficult it was to study English. No surprises there. It is a difficult language to master, just like Chinese. I made a few suggestions based on my experience. One involved a very valuable fact which I learned from my high school Latin and Greek teacher, Dr. Smith．He is a gifted linguist （语言学家），and has an amazing ability to remember things, like poetry, essays, speeches, etc．His advice to us students is that for memorization purposes, there is forty minutes each day in which our memory is more acceptable than it is during the other 23 hours and 20 minutes.

    This 40-minute "super memory" period is divided into two parts: the 20 minutes before we sleep, and the 20 minutes after we first awake. The theory supporting this is pretty simple. First, the last information we input into our brain before bed has a better chance of taking root than information gained during the noisy daytime; and second, our mind is free of disturbance(干扰) when we first awake in the morning一so more receptive to inputs, like a blank slate（石板）．

    I took the advice to heart and it served me well in my school years. In my university days, our Chinese teacher would assign us 200 new vocabulary words each day, on which we would be quizzed（测试）the following day. Without the "magic" 40-minute technique, there's no way I would have passed those daily quizzes.

    As far as language study goes, it's not only useful for memorizing vocabulary. It's also a very useful window of time to listen to the language we're studying even with background noise, and even if it's at a level we find difficult to understand. It might be audio（声音的）language study, aids, or just radio, TV or whatever.

    Beyond our years of formal(正式的) education, memory skills are hugely important in any career. How many times have we heard a speaker read their speech from a prepared text, or read the word-by-word content of a PowerPoint presentation as they present each slide（投影片）? These are annoying, boring, and less effective ways of communicating. They are almost guaranteed(保证) to lose the audience's close attention and interest, let alone persuade or inspire anyone to do anything. And yet lots of people still make this mistake.

    If we use the 40-minute technique, we may not succeed in memorizing our presentation content on a 100% word-by-word basis, but we'll be familiar enough so that we can spend much more time making eye contact with our audience. We will get them in the process, while looking at our text instead of staring at it. This will also free up our hands and arms to convey some extra messages through gesture．

    As you see, the technique really works, but like many things, it takes practice to perfect it. Therefore, we'd better find ways to use the language outside of the classroom, as regularly and frequently as possible. One basic rule of language learning is, "Use it, or lose it·”

Seize the forty-minute learning window and we'll bring in a rich harvest of language learning.

Great women

    When it comes to changing the world, these women have invented, researched and collected their way to a place in scientific history.

    Hedy Lamarr

    More widely known as a Hollywood star during the 1930s and 1940s, Hedy Lamarr（1914－2000）was much more than a pretty face. After her home country Austria was taken over by the Nazi, highly intelligent and fearless, Lamarr worked with scientist and inventor George Antheil to develop a secret communication system. Without her work, wireless（无线的）technology as we know it today would not exist. Today she is considered as the mother of WiFi.

    Ameenah Gurib-Fakim

    Ameenah Gurib-Fakim was born in 1959 in Mauritius, the country for which she now serves as the first woman president. She is a scientist who has spent many hours researching the local plants of Mauritius and their values as medicine. She has held many high positions in the fields of both politics and science and was awarded（授予）the 2007 UNESCO Award for Women in Science.

    Mae C. Jemison

    On June 4,1987, Mae C. Jemison became the first African-American woman to enter the space program. On September 12,1992, she joined several other astronauts on the Endeavour, becoming the first African-American woman in space. Born in Decatur, Alabama in 1956 and raised mostly in Chicago, Jemison holds many awards and degrees, As a child, Jemison spent a lot of time in her school library ,reading especially books space.

    Students perform less well in final exams if smartphones are allowed in class, for non-academic (非学业的) purposes in lectures, a new study in Educational Psychology finds. Students who don't use smartphones themselves but attend lectures where their use is acceptable also do worse, suggesting that smartphone use damages the group learning environment.

    Researchers from Rutgers University in the US performed an in-class experiment to lest whether dividing attention between smartphones and the lecturer during the class affected students' performance in within-lecture tests and a final exam. 118 students at Rutgers University took part in the experiment during one term of their course. Smartphones were not allowed in half of the lectures and allowed in the other half. When smartphones were allowed, students were asked to record whether they had used them for non-academic purposes during the lecture.

    The study found that having a smartphone didn't lower students' scores in comprehension tests within lectures, but it did lower scores in the final exam by at least 5%, or half a grade. This finding shows for the first time that the main effect of divided attention in the classroom is on the length of time in keeping memory, with fewer things of a study task later remembered. In addition, when the use of smartphones was allowed in class, performance was also poorer for students who did not use them as well as for those who did.

    The study's lead author, Professor Arnold Glass, added: "These findings should alarm students and teachers that dividing attention is having a not obvious but harmful effect that is damaging their exam performance and final grade. To help manage the use of smartphones in the classroom, teachers should explain to students the alarming effect—not only for themselves, but for the whole class."

    This is the first-ever study in an actual classroom showing a relationship between losing attention from smartphones and exam performance. However, more researches are required to see how students are affected by using smartphones after school.

Libraries

    Public libraries

    Most towns in Britain have a public library. A library usually has a large selection of books and other resources, which library members can use and borrow for free.

    Britain's First Public Library

    The first public library in Britain opened in Manchester in1852. It's first librarian was a man called Edward Edwards, Edwards attended the library's opening ceremony and two famous writers called Charles Dickens and William Thackeray were there too.

    How to Join a Library

    To join a library, go to your local library and fill in a form. You'll receive a library card which is needed when using library services.

    Mobile Libraries

    Not everyone can get a library. Some people live far away from towns and cities. Other people find it difficult to go out because they have an illness or a disability. Thanks to mobile libraries, these people can still borrow books.

    Unlike most libraries, which store books in buildings, mobile libraries usually keep their books in a mini-bus. The back of the mini-bus has shelves for the books, and it is big enough for borrowers to step inside and look around. A driver takes the mini-bus to a certain place at a certain time, so people know when to expect it. They can then return their books and borrow some more.

    All Aboard the Library!

    A school in London didn't have space for a library inside the building. However, everybody agreed that it was still important to have a school library. So the head of the school, Graham Blake decided to park an old bus on the school car park and changed it into a library. Pupils helped to paint the bus, and after eight months, the new library was ready.