Zebra crossings－the alternating dark and light stripes on the road surface－are meant to remind drivers that pedestrians may be trying to get across. Unfortunately, they are not very effective. A 1998 study done by the Department of Traffic Planning and Engineering at Sweden's Lund University revealed that three out of four drivers maintained the same speed or even speeded up as they were approaching a crossing. Even worse, only 5% stopped even when they saw someone trying to get across.

    Now a mother-daughter team in Ahmedabad, India has come up with a clever way to get drivers to pay more attention－a 3-D zebra crossing with an optical illusion (视错觉).

    Artists Saumya Pandya Thakkar and Shakuntala Pandya were asked to paint the crosswalks by IL&FS, an Indian company that manages the highways in Ahmedabad. The corporation was looking for a creative solution to help the city's residents to cross the busy accident-prone  (易出事故的) roads safely. Thakkar and Pandya, who had previously seen images of 3-D zebra crossings that gave drivers the illusion of logs(原木)of wood on the streets in Taizhou, China, decided to test if a similar way would work in India.

    Sure enough, in the six months that the 3-D crosswalks have been painted across four of the city's most dangerous highways, there have been no accidents reported! The artists say that while it may appear that the zebra crossing could cause the drivers to brake suddenly and endanger the vehicles behind, such is not the case. Because of the way the human eye works, the illusion is only visible from a distance. As they get closer, the painting looks just like any other ordinary zebra crossing. The creators hope that their smart design will become increasingly common throughout India and perhaps even the world. So let's look forward to it.

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    Thousands of persons in Peru are suffering from the disease cholera. Medical experts say it is the first time in their century that cholera has reached the western part of the world. The Untied States Centers for disease Control says the kind of cholera has been spreading throughout the world since 1961. It was discovered that year in Indonesia. Since the first case in Peru, more than sixteen thousand people have been affected and about one hundred have died.

    Cholera is caused by polluted food and water. People become infected (传染 ) when they eat the polluted food or drink the polluted water. If untreated immediately, they may die within hours. Most victims however , can be saved. treatment includes drugs and replacement of body fluids ( 液体) directly into the blood.

    Medical researchers have developed a vaccine ( 菌苗) medicines to protect against cholera. But the vaccine is only about 50% effective. And it protects against cholera for only about six months. Medical experts say the best way to fight cholera is to prevent it. They also say people should not eat uncooked food or food that has not been cooked long enough. People who live in areas where cholera has been found should wash their hands before eating and cooking. They should drink only water that has been boiled or made pure with chemicals.

    It's been said that honesty is the best policy．It sounds like the simplest thing in the world，but being truly honest with others and with yourself can be a real challenge．Most of us learned to be dishonest as children．Remember that dishonesty is rooted in fear，so you must look for and face those fears．By listing areas where you have a problem，and then working to deal with them，you can battle these habits．If you find yourself lying because you fear disapproval from someone，for example，perhaps you need to learn how to stop being a people pleaser and be yourself．Most importantly，admit your errors so that you can forgive yourself and use those experiences to reinforce your determination to do better．

    If you feel guilty for having been dishonest in the past，apologize to the person you lied to or find a creative way to make things right．If you've lied to a person who plays an important role in your life （a significant other，relative，or friend），the best （but most difficult） thing to do is to come clean．

    Think honestly．This may sound silly，but if you don't think honestly，you won't be honest．

    If you're pushed into a corner and don't know how to respond，you have the right to remain silent or say"Can we talk about this another time?"or"I really don't feel comfortable talking about this．"Don't say"I don't know．"

    Practice being honest on the simple things．Abraham Lincoln became famous for going to great lengths to return a few cents that did not belong to him，hence the nickname"Honest Abe"．By applying honesty to the little things，you will get in the habit of being honest in general．

    International Children's Day is coming up on June 1st. Here we have chosen some films from around the world that are most worthy for children to see.

    E, T. the Extra-Terrestrial (1982)

    Director: Steven Spielberg

    Country: United States of America

    Storyline: A group of aliens are visiting the Earth at night. But one of the visitors from space is left behind and finds himself all alone on a very strange planet. Fortunately, he meets Elliot, a lonely boy himself, and slowly makes friends with Elliot's older brother Michael, his sister Gertie. Meanwhile government officers work day and night to track down the little alien. Elliot and others try their best to help the alien go home.

    Children of Heaven (1997)

    Director: Majid Majidi

    Country: Iran

    Storyline: Ali takes his little sister Zahra's shoes to the shoemaker to be repaired but loses them on the way home. There is no money to buy another pair. Ali makes a plan to share his shoes: Zahra will wear them in the morning and hand them to Ali at midday so he can attend school classes. Ali then enters a children's racing competition in hopes of receiving the third prize, a new pair of shoes.

    Kes (1969)

    Director: Ken Loach

    Country: United Kingdom

    Storyline: Bullied (欺凌) at school and getting little attention at home by his mother and older brother, Billy Casper, a 15-year-old boy from a working-class family, finds peace in his pet falcon (猎隼), Kes. With encouragement from his English teacher, Billy eventually discovers a positive purpose to his unfortunate life, until some bad thing comes.

    Sydney has a huge bus system(系统). No buses accept cash, and a ticket needs to be bought ahead of time. The buses often run at busy hours and regularly(有规律地) during the day. The Sydney Explorer bus provides air-conditioned service and stops at 27 tourist attractions. Its partner, the Bondi Explorer, stops at 19 attractions. Tickets allow holders to jump on and off as they please, and they are valid(有效的) for one or two days. It's an easy way to see the city and the surroundings.

    Sydney's train service runs throughout the central city area and the surroundings. Tickets can be bought from machines that operate 24 hours a day or from ticket offices. The monorail(单轨铁路) travels through central Sydney. It is the most excellent way to gain a good view of the whole city. The monorail runs every three to five minutes, and it takes 15 minutes to complete its journey.

    Sydney is built around a harbor, and the Parramatta River has a large ferry（渡轮）system. It serves the area around the harbor. These include Taronga Zoo, Darling Harbor, Rose Bay, the North Shore, Cockatoo Island and Sydney Olympic Park. The ferries have operated for more than 135 years and 14 million passengers take the ferries each year.

    Water taxis can transport passengers to specific locations(地点), and offer guided tours of waterways. They also offer special services that some visitors may enjoy. The tickets sell for 20 AUD (Australian dollars)for a day or 57 AUD for a week. It is strange, isn't it?

    Human began farming around 12,000 years ago, and only in the past 50 years have scientists realized we're not the only species to research into agriculture. A new study has revealed that a small Fijian ant species beat us to becoming the first farmers by almost three millions years.

    The ants have been observed carefully sowing seeds, fertilizing (施肥) them, and waiting for them to grow into plants which bear tasty fruit. What led to the formation of this relationship remains a mystery to scientists. But it puts the ants millions of years ahead of the first human societies to use farming techniques.

    The newly discovered relationship is unique to the animal kingdom. Researchers say they have already watched ants spread seeds, and ants feed plants, but they never had a case where they farm a plant they can't live without. The ants rely on the plants for shelter and food, while the plants need the ants to sow and spread their seeds.

    The find puts the ants millions of years ahead of the first human societies to use farming techniques, who began using agriculture around 12,000 years ago.

    As the plants grow under the care of the ants, the plants to keep further growth. Once the plant is big enough, its hollow chambers provide shelter for the ants. It had previously been spotted that the ants like to live in these small chambers, but the Munich researchers have uncovered the true nature of the relationship that ants sow and take care of the plants to grow themselves a new home.

    The ants will eat the fruit of the plant and harvest their seeds for further projects.

While many other examples of mutually (相互地) beneficial relationships between ants and plants exist, the discovery marks the only case in which both parties other for are totally dependent on each other survival.