Walk down the drinks section at the supermarket.Look in the drink cooler in your local convenience store.A new drink is taking up more and more space on the shelves，and that drink is water.Bottled water sales in the US rose to 1.7 billion gallons in 2010 for plastic bottles alone，compared to total sales of only 700 million gallons in 1990. Whereas bottled water was once associated only with the rich and the privileged (特权阶层)，it is now regularly drunk by people at all income levels despite the fact that the price of bottled water can be between 240 and 10,000 times higher per gallon than tap water.What accounts for this surprising increase in demand?

    Traditionally，people have drunk bottled water for health reasons.The practice of “taking the waters” originated with the Romans，who believed that a person developed a healthy mind by building a healthy body.Across Europe，drinking or bathing in mineral water has been associated with the power to cure various diseases.Health spas at Evian in France and Pellegrino in Italy began bottling water so that their consumers could continue their treatments at home.The consumers in the 21st century are also concerned about health.However，in America，where the habit of drinking bottled water is relatively new，the concern is often more related to the purity or sterilization (消毒) of the water than to its mineral contents.Americans are often worried about the effects of the chemical pollution and other contaminants on the water supply.Many Americans view bottled water as a safe alternative to tap water.

    Further reasons for drinking bottled water are its usefulness as an aid to digestion，as a complement to a good meal in a restaurant，and for taste.City tap water is often treated with chlorine (氯) to guard against harmful micro­organisms.Chlorine，as well as metals from pipes and tanks used to distribute and store tap water，can leave behind an unpleasant taste.

    Everything has a name. All people, places and things have names. For example, Jenny is the name of a student from England. England is the name of her country. Cities and towns have names, too. Schools and office building also have names. All things have names. Names are important.

    Names are different all over the world. In Jenny's class, Jenny must learn the names of students from all over the world. This is very difficult because the names are different.

    In the USA, most people have a first name, a middle name, and a last name. Parents choose the first and middle names for their baby. There are names for boys and names for girls. For example, John, Peter, Tom and Mike are all names for boys. Elizabeth, Betty, Susan, and Mary are all names for girls. The last name is the family name. Usually it is the father's family name. In a family, the mother, the father, and the children usually have the same last name.

    Names are different all over the world. They can be long or short, but they are always very important.

    Every year, 1.5 million kids around the world die as a result of not getting vaccines (疫苗). This is partly because transporting and storing medicines can be a huge challenge in some countries.

    Anurudh Ganesan, 17, knows this firsthand. When he was a baby in India, his grandparents carried him 10 miles to a health clinic in a remote village to receive a vaccine. But by the time they arrived, the vaccines were no longer usable because they had been overheated.

    Vaccines, Anurudh later learned, must be kept cool to stay effective. But refrigerating them requires electricity or ice – precious resources that many developing countries lack.

    Although Anurudh eventually received the vaccine he needed, his experience as a baby and the sad reality that so many other children aren't as lucky motivated him to take action. The high school student invented Vaxxwagon, a portable vaccine-carrying device that generates its own power to keep lifesaving medicines cool as they're delivered to remote areas around the world.

    Anurudh first got his idea for Vaxxwagon in 2014. He read several textbooks to learn everything he could about refrigeration, and then he did research online to learn more about vaccines. Rather than relying on electricity or ice, Anurudh figured out a way to use wheels to power a refrigeration system for about eight hours. The entire rechargeable cooling system can be pulled to areas in need of vaccines by a bicycle, a car, or an animal. Eventually, Anurudh took his design to professors at Johns Hopkins University for advice. Not only did they confirm Vaxxwagon could work, but they offered him funding to help build it.

    Anurudh was rewarded with the 2015 Google Science Fair LEGO Education Builder Award for his invention. Anurudh says his final goal is to start selling Vaxxwagon to relief organizations, so it can be used to help people around the world.

Anurudh, who plans to pursue engineering degree in college, says, “Don't give up on your ideas. But always try to help others with your projects. That's the point of engineering – to help people.”

May's Midi Festival

    As a rock festival, the Midi Festival 2017 in Beijing presented a musical carnival for fans. It was the 13th year of the outdoor music feast. This year, about 100 rock bands from home and abroad performed on five stages. It was held at a suburban park known for its mountains and grasslands. With beautiful scenery and exciting music, it was a good opportunity to enjoy rock with friends and family.

    2：00—10：30 P. m. , from April 29 to May 1. China Music Valley Grassland Park, Pinggu District. 400-610-3721.

    Fans of Painting

Ancient Chinese calligraphers(书法家)and painters were fond of painting on the folds of fans. Their excellence has left a wealth of outstanding works. A fan painting show exhibited 990 Ming and Qing(1368—1911)dynasty calligraphy and painting works on folding fans. They were selected from the collection of the National Museum of China. The themes of these fan paintings fell into four categories：natural landscapes, flowers and birds, figures and calligraphy.

    10：00 a. m. —2：30 P. m. , from April 29 to May 29. National Museum of China, 16 East Chang'an Avenue. 010-651-6400.

    Poetic Portraits

    Two artists held a joint exhibition with paintings featuring portraits of Chinese women in poetic poses. Wang Xiaojin, who is from Shandong Province, has been exhibiting since 1993. The other artist, Xu Zhigang, is originally from Liaoning Province, but is now in Beijing.

    10：00 a. m. —8：00 P. m. , from April 28 to June 20. Rong Gallery, Sheraton Pudong Hotel, 38 Pujian Road, Pudong New Area. 0137-6408-7294.

    Group Show

    The artist group,“island6”, worked in new media and held a show titled     Body-City-Mechanism. Through interactive video, photography, oil on canvas and sculpture, the artists explore themes of man and cyberspace.

    10：00 a. m. —6：00 P. m. , from April 30 to June 28. Studio Rouge, 50, Moganshan Road, Putuo District. 021-5252-7856.

    It sounds almost too good to be true, but a new study on sleeping brains suggests that listening to languages while you sleep can actually help you to learn them.

    For the study, researchers played recordings of foreign words and their translations to subjects enjoying slow-wave sleep, a stage when a person has little consciousness of their environment. To ensure that the results were not compromised by foreign language words that subjects may have had some contact with at some point in their waking lives, researchers made up totally nonexistent foreign words.

    When the subjects woke up, they were presented with the made-up words again without their translations. The subjects were then asked to imagine whether this made-up word indicated an object that was either smaller or larger. This vague(模糊的)way of testing their understanding of the words is an approach that is supposed to tap into the unconscious memory.

    Unbelievably, the subjects were able to correctly classify the words in this way at an accuracy rate that was 10 percent higher than random chance. That's not a rate high enough to have them suddenly communicating in a foreign tongue, but it is enough to suggest that the brain is still absorbing information on some level, even during sleep.

    Researchers have long known that sleep is important for memory, but previously its role in memory was thought to relate only to the preservation and organization of memories acquired during wakefulness. This is the first time that memory formation has been shown to be active during sleep.

    In other words, our brains are listening to the world, and learning about it, even when our conscious selves are not present.

    The next step for researchers will be to see if new information can be 1earned quicker during wakefulness if it was already presented during sleep. If so, it could forever change how we train our brains to learn new things. Sleep learning might become a widespread practice.

Coca-Cola is to test a paper bottle as part of a longer-term goal to get rid of plastic from its packaging entirely. The prototype(样本) is made by a Danish company from an extra-strong paper shell that still contains a thin plastic liner (衬垫). But the goal is to create a 100% recyclable, plastic free bot tle capable of preventing gas escaping from carbonated(碳酸) drinks. The barrier must also ensure no fibers get into the liquid. 

That may have a risk of changing the taste of the drink ——or potentially can't meet the requirements of health and safety checks. But industry giants (巨头)are backing the plan. Coca-Cola, for example, has set a goal of producing zero waste by 2030. Coca-Cola was ranked the world's number one plastic polluter by charity group Break Free From Plastic(摆脱塑料) last year, closely followed by other drink-producers Pepsi and Nestle. 

The Paper Bottle Company, or Paboco, is the Danish firm behind the devel-opment of the paper-based container. Part of the challenge has been to create a structure capable of standing the forces exerted by carbonated drinks —— such as cola and beer —— which are bottled under pressure. On top of that, the paper needs to be mouldable to create different bottle shapes and sizes for different brands and take ink for printing their labels. 

After more than seven years of lab work, the firm is now ready to host a trial in Hungary this summer of Coca-Cola's fruit drink Adez. Initially, this will in-volve 2, 000 bottles distributed via a local retail chain. 

But it is also working with others. Absolut, the vodka maker, is due to test 2, 000 paper bottles of its own in the UK and Sweden of its pre-mixed, carbonated raspberry drink. And beer company Carlsberg is also building prototypes of a paper beer bottle. 

Michael Michelsen, the firm's commercial manager, says the bottles are formed out of a single piece of paper-fiber-based material to give them strength.