We produce 500 billion of plastic bags in a year worldwide and they are thrown away polluting oceans, killing wildlife and getting dumped in landfills where they take up to 1,000 years to decompose. Researchers have been unsuccessfully looking for a solution.

    The 16-year-old Canadian high school student, Daniel Burd, from Waterloo Collegiate Institute, has discovered a way to make plastic bags degrade(降解) in as few as 3 months, a finding that won him first prize at the Canada Wide Science Fair, a ＄10,000 prize, a ＄20,000 scholarship, and a chance to revolutionize a major environmental issue.

    Burd's strategy was simple: Since plastic does eventually degrade, it must be eaten by microorganisms(微生物)．If those microorganisms could be identified, we could put them to work eating the plastic much faster than under normal conditions.

    With this goal in mind, he grounded plastic bags into a powder and concocted(调制) a solution of household chemicals, yeast(酵母) and tap water to encourage microbes growth．Then he added the plastic powder and let the microbes work their magic for 3 months．Finally, he tested the resulting bacterial culture on plastic bags, exposing one plastic sample to dead bacteria as a control．Sure enough, the plastic exposed(暴露) to the live bacteria was 17% lighter than the control after six weeks.

    The inputs are cheap, maintaining the required temperature takes little energy because microbes produce heat as they work, and the only outputs are water and tiny levels of carbon dioxide.

    “Almost every week I have to do chores and when I open the closet door, I have piles of plastic bags falling on top of me．One day, I got tired of it and I wanted to know what other people are doing with these plastic bags．The answer: not much．So I decided to do something myself.” Said Daniel Burd.

    James Gross, a psychology professor at Stanford University, has a 13-year-old daughter who loves math and science. “It hasn't occurred to her yet that's unusual,” he says. “But I know in the next couple of years, it will.”

    She's already being pulled out of class to do advanced things with a couple of other kids, who are guys. And as someone who studies human emotion for a procession, Gross says, “I know as time goes on, she will feel increasingly lonely as a girl who's interested in math and science, and be at risk of narrowing her choices in life before finding out how far she could have gone.''

    Gross' concern clearly shows what has been a touchy subject in the world of science for a long time: Why are there still so few women in science, and how might that affect what we learn from research?

    Women now make up half the national workforce, earn more college and graduate degrees than men, and by some estimates represent the largest single economic force in the world. Yet the gender gap in science persists, to a greater degree than in other professions, particularly in high-end, math-intensive fields such as computer science and engineering.

    According to US Census Bureau statistics, women in fields commonly referred to as STEM (science, technology, engineering, mathematics) made up 7 percent of that workforce in 1970, a figure that had jumped to 23 percent by 1990. But the rise essentially stopped there. Two decades later, in 2011, women made up 26 percent of the science workforce.

    A woman was sitting by herself in a movie theatre. The movie she was about to see was a musical version (版本)of a very successful book that had sold a million copies that year.

    As the woman was waiting for the movie to begin, she noticed that the theatre was very crowded but the two seats next to her were empty.

    Suddenly a large man carrying a big fur coat walked down the aisle (走廊) and sat down, placing the fur coat on the seat next to her.

    When the lights went out, the fur coat began to move, and the woman realized it was not a coat but a large furry dog. He was sitting up in the seat, watching the movie screen with great interest. As soon as the movie started, the dog began to nod his head and beat his paws（爪） in perfect time to the music.

    When the movie was over, the woman turned to the man and said, "Excuse me, sir, but I've never seen such a well-behaved dog in a movie theatre before. Does he go to the movies often?"

    "Oh, yes," replied the man.

    "And he seemed to enjoy everything so much," she said, "It was just amazing!"

    "As a matter of fact, it surprised me, too," said the man. "He hated the book!"

    Asia is such a vast and diverse continent for anyone dreaming of an escape. Here are some best destinations to visit over the next 12 months.

    Xi'an, China

    Xi'an, China is supreme and then there's the biggie (重要的事物)-the Army of Terracotta Warriors, celebrating 30 years as a UNESCO World Heritage Site in 2017.

    Xi'an is vast, but a relaxed way of living and recent openings have boosted an already superb accommodation market. A crop of new bars and cafes are thrown in here. There's never been a better time to visit.

    South of Tokyo, Japan

    Two cities in south of Tokyo are well worth visiting.

    Yokohama is just a 20-mixinte train journey from the capital and packs considerable appeal with its bayside location, architecture, beer and tasty cuisine.

    Less than an hour from Tokyo, fantastic seaside town Kamakura »s known for its surfing scene, but also offers an attractive selection of relaxed cafes and restaurants.

    Sri Lanka's Hill Country

    Sri Lanka may be “so hot right now”, but Lonely Planet recommends a different experience.

    Try getting ahead of (and away from) the pack by taking a scenic train to Sri Lanka's Hill Country for a wonderfully temperate escape from the nation's humid coasts.

    This island owns a mountainous interior that is every bit as scenic as the coast, blessed by pleasantly cool temperatures that rarely above 21℃.

    Raja Ampat, Indonesia

    “Raja” means “king” and this grand title is apparent. Packed with white-sand beaches, lush jungle and unusual mushroom-shaped small islands. Raja Ampat is a biological hotspot.

    Home to some of the richest, most diverse coral reefs on the planet—over 200 diving spots are still in a state of nature—and this, paired with a growing ecotourism (生态旅游) offering, means Raja Ampat will no doubt remain king of the islands.

    The following are four famous malls in the world where you can not only purchase things but also enjoy entertainment.

    Mall of America (Minnesota, USA)

    This Mall has a theme park and a wedding church, where more than 5,000 couples have been married since its opening. The mall of America opened in 1992 and is the third largest mall in North America.

    The mall of America is the most visited shopping mall in the world, with more than 40 million visitors annually. Spending 10 minutes in every store would take shopper more than 86 hours to complete their visit to the Mall of America.

    Mall of the Emirates (Dubai)

    The mall of the Emirates is an entertainment and shopping resort located in Dubai. It offers a full range of shopping, leisure and entertainment facilities.

    This shopping center is home to over 450 retailers（零售商）and also features a complete range of entertainment options, including Ski Dubai, the first indoor ski destination in the middle East.

    West Edmonton Mall (Alberta, Canada)

    The fifth largest mall in the world and the largest in North America, it has the largest indoor water park, which has the biggest wave pool in the world.

    The mall has a theme park called Galaxyland, with a number of attractions, including a roller coaster. In addition, the mall has an indoor lake, which is home to four sea lions.

    The Dubai Mall (Dubai)

    The Dubai Mall is the world's largest mall in total area.

    The mall has 1,200 shops and houses an aquarium（水族馆）which earned the Guinness World Record for the world's "largest Acrylic Panel". The mall is also home to an ice rink（溜冰场）, a 250-room luxury hotel and 22 cinema screens, plus 120 restaurants and cafes. It's also famous for the unique "malls-within-a-mall" concept, with themed shopping area like Gold Souk, Fashion Island and The Grove, an indoor-outdoor streetscape with a fully retractable（可缩回的）roof.

    Sydney Airport International Terminal-Arrivals Area

    SPECIALTY RETAIL

    Newslink: Two separate Newslink stores cater to all your reading needs including newspapers, magazines and the latest bestsellers.

    Downtown Duty Free: Make sure you shop at Downtown Duty Free for great savings on a range of items including perfume, alcohol, skincare and cigarettes. It's your last chance before customs.

    Beach Culture: A must for those who go into the Latest in beach clothing. Top surf, street and fashion labels including Mambo, Stussy and Quicksilver, including children's sizes.

    DINING

    Blue Sky Care: Speedy service leaves you time to keep an eye on the arrivals gate. Morning pastries, fresh juice, breakfast rolls and coffee while you wait.

    McDonald's: hamburgers, fries, drinks, muffins and shakes—all your family favorites. Breakfast served until 10:30 a. m.

    SERVICES

    ATM: ATMs are conveniently located throughout Arrival and Departures. Dollars, pounds, francs and RMB are all available.

    Vodafone Rentals: This communication center offers the very latest technology for mobile phone rentals, sales and servicing.