Young children from poor families are more likely to consume junk food and fizzy drinks(汽水) than their richer companions. A study of 1,800 four- and five-year-olds found more than half of those from poor backgrounds drank at least one a week, compared to just four in ten oofy kids. They also drank less milk and consumed more fruit juice which is also linked to child obesity (肥胖) caused by high sugar intake(摄取量).

    The phenomenon also relates to children who spend more than two hours a day in front of a TV or playing computer games—whatever their social circumstances. A companion study also found children from poor families were more likely to eat chips, sweets and chocolate. Professor Kate Storey said, “when you are looking at that age group, and such a large percentage of very young kids in the study are consuming a large amount of soda(苏打汽水)，it is quite concerning. ”

    The researchers carried out the study by surveying the parents of their participants to find out their dietary habits. Professor Storey said, “If you are drinking a lot of soda and fruit juice, they can displace(取代)consumption of water and milk, which are important not just for ending thirst, but for developing healthy bones and teeth, and health and wellness in general.”

    Co-researcher Dr John Spence said, “Dietary behavior and intake patterns are influenced heavily by what happens in the first few years with children, and they maintain those patterns throughout childhood and into adolescence(青少年时期).” In addition to basic health education, this study identifies a need in how we are dealing with poverty and recognizing there is more to poverty than simply the number of dollars people have.

    Professor Storey said that shows how education can make a difference and lead to healthier eating habits, regardless of what is happening at home. “Many families live in places that might not be very healthy for them and, as a result, they make unhealthy food choices. You can start making a difference in different places. It calls for action in multiple settings, schools and communities, for example. That light-bulb moment can happen in a variety of places,” Professor Storey added.

    The full moon climbs over the eastern horizon (地平线) and hangs like a huge orange globe in the sky. A few hours later, the moon is overhead but seems to have changed. The huge orange globe has become a small silver disk. What has happened? Why has the orange color disappeared? Why does the moon seem so much smaller and farther away now that it is overhead?

    The moon appears orange on the horizon because we view it through the dust of the atmosphere. The overhead moon does not really shrink as it moves away from the horizon. Our eyes inform us that the overhead moon is farther away. But in this position the moon is actually closer to our eyes than when it is near the horizon.

    The change in size is a trick our eyes and minds play on us. When the moon is low in the sky, we can compare its size with familiar objects. It is easy to see that the moon is much larger than trees or buildings, for example. When the moon is high in the sky, however, it is hard to compare it with objects on earth. Compared to the vastness of the sky, the moon seems small.

    There is another reason why the moon seems to shrink. We are used to staring at objects straight ahead of us. When an object is difficult to see, our eyes have to try to focus on it. When we move our heads back to look up, we will try hard again. Looking at something from an unaccustomed position can fool you into believing an object is smaller or farther away than it is. However, scientists do not yet understand completely why the moon seems to shrink as it rises in the sky.

    Ever since it was created 30 years ago, The Simpsons, the longest running prime-time (黄金时段) TV show in the country, has become part of US life. So when TV critics Alan Sepinwall and Matt Zoller Seitz ranked the 100 greatest comedies and dramas broadcast in the US, it came as no surprise that The Simpsons was their top choice.

    This was the show that changed the very concept (概念) of cartoons in Western society. Before it appeared, cartoons were considered a way to learn and have fun, not serious adult entertainment. The Simpsons changed this. The genius (过人之处) of the show is that it has something to offer both adults and children.

    It's a hugely entertaining program that's also full of satire (讽刺) and clever humor. A remark by Chitra Ramaswamy in The Guardian gave a sense of the esteem (敬重) in which The Simpsons is held: “Nothing before or since has matched its capacity to be at once so profoundly (深刻地) clever and so unbelievably stupid.”

    The show's creator Matt Groening, and the brilliant team that work with him, make fun of the US government, social customs, and of course, the idea of family life. But unlike classic US prime-time TV characters, the Simpsons are a dysfunctional (功能失调的) family.

    Bart, the boy, is always in trouble – both at home and at school. That may be in part because of his paternal (父亲的) example. Homer Simpson, perhaps the most iconic character, is a beer-swilling (喝着啤酒的), overweight slob (懒汉) who is normally found in front of the TV. And Marge, Homer's wife and the mother of the family, spends most of her time cooking, cleaning or trying to fix the messes that Bart and Homer make.

    The smartest member of the family is daughter Lisa, who excels (表现卓越) at school but is no goody-goody (讨好卖乖的人): Lisa never misses an opportunity to challenge authority. The youngest member of the family is baby Maggie, who will likely be as much a trouble as her brother and sister when she grows up – if she ever grows up, that is.

    But although the Simpsons are a problem family, viewers are always on their side. One of the reasons the show has remained so popular all these years is that the characters are so likeable. Millions of us identify with (同情) them. They are a working class family struggling to make ends meet. They aren't perfect, but then, who is? And after 30 years, this is still what strikes a chord (引起共鸣) with millions of viewers worldwide.

    Some parts of the garden are for the rest of the world to admire. Others are for you to disappear to when you don't want to be found. Of course, that's easy enough to arrange when you have lots of land with space for the kids to run round and cosy "garden rooms" for the adults to enjoy. But when your garden is on the small side, you might think it's a tall order. Well, you're wrong.

    To create a secret garden, people tend to take the routine: surrounding a small garden with high fences and then placing a lawn(草坪) in the middle and borders round the edge. Far from making the most of the area, that just makes it look a lot smaller and more boring. Dividing it up makes much more use of your space and means you can have your practical family area plus a secret garden.

    When you're searching for the perfect secret site within your existing set-up, consider your present favourite spot. A secret garden needs to be special—a complete contrast to the more practical family parts of the garden. Perhaps you take a folding chair down to a quiet corner that gets evening sun; maybe you sit and watch the pond or simply slip out to the patio(露台)with a glass of wine.

    It's quite easy to change an existing favourite feature into a secret place. You could top the patio with a pergola(棚架) pole and plant a grapevine for shade, or position a bench overlooking the pond and plant bamboos to screen it from the rest of the garden.

    The areas you create needn't all to be the same size—or even the same style—but if you're planning a major redesign, take your time and work it out on paper before committing time and money. Then when it's done, you'll really be able to relax and enjoy it.

    Next month, I'm traveling to a remote area of Central Africa and my aim is to know enough Lingala — one of the local languages — to have a conversation. I wasn't sure how I was going to manage this — until I discovered a way to learn all the vocabulary I'm going to need. Thanks to Memrise, the app I'm using, it feels just like a game.

    "People often stop learning things because they feel they're not making progress or because it all feels like too much hard work," says Ed Cooke, one of the people who created Memrise. "We're trying to create a form of learning experience that is fun and is something you'd want to do instead of watching TV."

    Memrise gives you a few new words to learn and these are "seeds" which you plant in your "greenhouse". When you practice the words, you "water your plants". When the app believes that you have really remembered a word, it moves the word to your "garden". And if you forget to log on (登录), the app sends you emails that remind you to "water your plants".

    The app uses two principles about learning. The first is that people remember things better when they link them to a picture in their mind. Memrise translates words into your own language, but it also encourages you to use "mems". For example, I memorized "motele", the Lingala word for "engine", using a mem I created — I imagined an old engine in a motel (汽车旅馆) room.

    The second principle is that we need to stop after studying words and then repeat them again later, leaving time between study sessions. Memrise helps you with this, because it's the kind of app you only use for five or ten minutes a day.

    I've learnt hundreds of Lingala words with Memrise. I know this won't make me a fluent speaker, but I hope I'll be able to do more than just smile when I meet people in Congo. Now, I need to go and water my Vocabulary!

    Many people have long dreamed of being able to fly around as simply as riding a bicycle. Yet the safety and strength of a flying bike was always a big problem. Over the past 10 years, developments in technology have moved the dream of personal flying vehicles closer to reality. Now, two groups of inventors say such vehicles may be available soon.

    The British company Malloy Aeronautics has developed a prototype (原型) of its flying bicycle. Grant Stapleton, marketing sales director of Malloy Aeronautics, says the Hoverbike is able to get in and out of small spaces very quickly." It can be moved across continents very quickly because it can be folded and packed," he adds.

    Mr. Stapleton says safety was the company's main concern. He says the designers solved the safety issue by using overlapping rotors to power the vehicle.

    The company is testing a full-size prototype of the Hoverbike, which will most likely be used first by the police and emergency rescue teams.

    In New Zealand, Martin Aircraft Company is also testing a full-size prototype of its personal flying device, called the Jetpack. It can fly for more than 30 minutes, up to 1, 000 meters high and reach a speed of 74 kilometers per hour.

    Peter Coker is the CEO of Martin Aircraft Company. He said the Jetpack "is built around safety from the start". In his words, "Reliability is the most important element of it. We have safety built into the actual structure itself, very similar to a Formula One racing car.

    The Jetpack uses a gasoline-powered engine that produces two powerful jet streams. Mr. Coker says it also has a parachute that would be used, if there should be an emergency. "It starts to work at very low altitude and actually saves both the aircraft and the pilot," he adds. Mr. Coker says the Jetpack will be ready for sale soon.