After spending three months in and out of the hospital with numerous health issues, Donald Austin had his leg partially cut off. He was relieved to finally be able to go home after just four days recovering from the operation. When he reached his porch, though, the joy drained away.

    Donald thought he'd be able to make it up the steps to the front door on crutches, but his strength and balance weren't as strong as he'd hoped. The wheelchair was too heavy for his wife, Jennifer Austin, to lift up the steps, even when his mom offered a hand to help. Donald ended up on the concrete, the family feeling totally at a loss. They were out of strength and out of options. Just then, a car caught the family's eyes. It had driven past once but was slowly circling back. The stranger, Steven Smith, pulled up and asked if he could help. Relieved, the family watched Smith lift Donald inside and lay him safely on a couch.

    But the Good Samaritan knew there was more to do. Smith figured this wasn't the only time Donald would need to climb those steps. So the next day, Smith, who's an ordinary worker, came back and asked if he could build a ramp(斜坡) in front of the house. With his dad and a couple more helping hands, Smith set up a ramp over the steps to make the home wheelchair accessible. The act of kindness brought the family to tears.

    “This stranger has saved the day for us twice within 24 hours. He also brightened our spirits that had become increasingly dimmed over the difficult months,” Jennifer wrote on Facebook. “There is a sense of optimism back in our home because of his kindness.”

    Green spaces within and around city schools improve the mental development of young children, a study has found. The findings may partly be explained by reduced exposure to traffic pollution, experts believe. Other influences could include the psychological effect of having views of fields and trees rather than roads and buildings.

    The Spanish researchers found each degree of increase in surrounding greenness led to a 5% improvement in the development of short-term, or working memory over a period of one year. It also improved the progress of "superior working memory”—the ability to update memories. with changing information—by 6%，and reduced inattentiveness. Computer analysis suggested that carbon from traffic might account for up to 65% of the trend.

    The researchers carried out mental performance tests on 2, 593 children attending 36 primary schools in Barcelona every three months for a year. Over the study period, participants' working memory increased by an average of 22.8%, and superior working memory by 15.2%, while inattentiveness decreased by 18. 9%.

    The researchers wrote, "Approximately one half of the world population lives in cities, and by 2030, three in five persons will live in urban areas worldwide, Urban areas are a network of non-natural built-up structures with increased pollutant levels and less green environments. Children's exposure to these pollutants has been associated with harmful impacts on their mental development. Our findings suggest a beneficial impact of greens paces exposure on mental development. "

    British experts said the study was interesting, but pointed out some limitations. Professor Andy Jones, from Norwich medical school, said, “The measure of green space used was the number of plants in the neighborhoods of the children and their schools. It was not a direct measure of usable green spaces, like public parks, although they will be included. " Dr Ross Cameron, at the University of Sheffield, said, “The authors suggest a causal link between air quality and green space. They admit, however, that this factor only seems to explain part of their correlations(相互关系), ”

    This is my origin story: when I was a teenager I wrote terrible poetry. Like really bad. Worse than yours, I bet. A lot of it about how every little thing reminds me that we're all going to die one day. I wrote collections and collections of these poems, thinking one day I would have my moment. I named one collection, ironically, The Eternal Optimist.

    In 1996, I found an advert for the International Poetry Competition. I was 16 years old and ready for my poetry to be released on the world. Not only was it a competition with a cash prize, but it was poetry, which I wrote, and international. This was my ticket to becoming world-famous. I submitted a poem called Trail of Thought. If you ever wrote bad poetry as a teenager, you'll have written something like it. In the poem, I went for a walk and noticed small poignant(辛酸的) things in nature, and each one reminded me that we were all going to die one day.

    I filled out the form, printed off the poem and sent it off, fingers crossed. I waited to hear back I carried on writing, I probably finished another collection. Then I got a letter from the International Society of Poets. I opened the envelope carefully, just in case a prize-winning cheque fell out I hadn't won. But, they liked my poem enough to include it in their anthology(诗选), Awaken to a Dream. I closed my eyes, I wanted to scream with happiness. I was going to be a published poet.

    All I had to do in order to be published was accept the terms and pay £ 45（plus £ 5 p & p）for an anthology. If I didn't buy a copy of the anthology, my poem wouldn't be included. I had to convince my mum, who thought my writing a meaningless pastime, to part with £ 50. She even asked the question: “Why do you have to pay to be in this book?” Nevertheless, she wrote a cheque for £ 50 and I returned it with my letter of agreement.

    I was 16 and about to be a published poet. This was what it had all been about. This is what it had all been leading to. The months waiting for the anthology were a torture. I hit some sort of writer's block, I couldn't write anything. It was almost as if, now I was published, it mattered more what I committed to page and I didn't want to write anything down unless it was good enough to go into an anthology like Awaken to a Dream.

    The book arrived through the post. Here it was. The first thing I had ever been published in a book called Awaken to a Dream, featuring a blistering take on the mundanity(世俗) of mortality by yours truly. I opened the package to find a book, containing my work. The first thing that struck me about the book was that it was bigger than A4. And it was thick. And on each page was a poem, next to another poem, next to another. The type was small and the paper thin enough to trace with. With three or four poems per page and more than 700 pages, I had a sinking realization. This was a scam, an illegal trick for making money.

    If each poem had cost the author £ 45, they were sitting on a fortune. I felt ashamed. Everyone who had submitted something to the International Poetry Competition had fallen for the same hustle（忙碌）as me. I couldn't bring myself to show my mum. And she never asked to see it. Perhaps she thought if the price of me learning a lesson was £50 we didn't really have, then so be it.

    But that stayed with me, that moment of realization. Because I determined to keep writing and ensure that my precious words always found a home worthy of them. Or at least that's how, more than 20 years later, I justify falling for a scam. Because your first time being published should be special, and if I don't convince myself that there was a reason for my first poem being in a vanity(无价值) book, then what good was it in the first place? And, strangely, someone is selling this book on Amazon at the moment. I wonder how many other writers who went on to do more stuff are in there.

    A long-term American study shows the importance of early education for poor children. The study is known as the Abecedarian(初步的) Project. It involved more than one-hundred young children from poor families in North Carolina.

    Half of the children attended an all-day program at a high-quality childcare center. The center offered educational, health and social programs. Children took part in games and activities to increase their thinking and language skills and social and emotional development. The program also included health foods for the children.

    The children attended the program from when they were a few weeks old until the age of five years. The other group of children did not attend the childcare center. After the age of five, both groups attended public school.

    Researchers compared the two groups of children. When they were babies, both groups had similar results in tests for mental and physical skills. However, from the age of eighteen months, the children in the educational child care program did much better in tests.

    The researchers tested the children again when they were twelve and fifteen years old. The tests found that the children who had been in the childcare center continued to have higher average test results. These children did much better on tests of reading and mathematics.

    A few years ago, organizers of the Abecedarian Project tested the students again. At the time, each student was twenty-one years old. They were tested for thinking and educational ability, employment, parenting and social skills. The researchers found that the young adults who had the early education still did better in reading and mathematics tests. They were more than two times as likely to go to college or to have completed college. In addition, the children who received early education were older on average, when their first child was born.

    The study offers more evidence that learning during the first months and years of life is important for all later development.

    The researchers of the Abecedarian Project believe their study shows a need for lawmakers to spend money on public early education. They believe these kinds of programs could reduce the number of children who do not complete school and are unemployed.

Benefits and Problems of Genetic Engineering

    Plant breeding is the science of changing the characteristics of plants in order to produce desired ones. Genes in a plant are what determine what type of characteristics it will have. Plant breeders try to create a specific outcome of plants and potentially new plant varieties by changing the genes of the plants through breeding, which is making new plants from parents of different varieties or species.

    Actually, plant breeding has been practiced for thousands of years, since near the beginning of human civilization. It is practiced worldwide by individuals such as gardeners and farmers and by professional plant breeders employed by organizations such as government institutions, universities, crop-specific industry associations or research centers. They have crossbred plants to create the new types of plants that are, for example, bigger, stronger, or more attractive.

    Crossbreeding can take such a long time, however, and it is inaccurate. Now, we can change exact sections of Deoxyribonucleic acid (DNA), so the process is more accurate and faster. But people all over the world are arguing about its benefits and disadvantages. Some people use the technology to produce desired characteristics of plants and animals. Other people are concerned that the genetically engineered plants may harm the environment and worried that they may be dangerous for people to eat.

    There are many reasons for changing plants in this way. International development agencies believe that breeding new crops is important for ensuring food security by developing new varieties that are higher yielding(高产的), disease resistant, drought tolerant or regionally adapted to different environments and growing conditions. For example, some genetically engineered plants can live through frost or draught. As a result, famers can make more profit because fewer plants will die.

    Some genetically engineered plants are more nutritious. They have less fat, taste better or stay fresher than non-genetically engineered plants. This will allow people to buy better-quality fruit and vegetables.

    Some genetically engineered plants can resist natural pests such as viruses or insects. This reduces the amount of chemical needed to kill pests, which is helpful to the environment.

    However, genetically engineered plants can cause unexpected problems. Genetically engineered plants that resist pests may pass on that characteristic to a wild relative. This may cause the wild plant to spread fast, because pests are not naturally killing it.

    Genetically engineered plants can also harm animals. A type of corn has been developed which kills a species of insect that destroys it. The pollen (花粉) from this corn, however, can also kill monarch butterflies—the most beautiful of all butterflies, which do not harm the corn.

    To ensure the most adapted varieties are identified, advocates of organic breeding now promote the use of direct selection for many desired characteristics.

    Genetic engineering is a very new science and we have a lot to learn about the good it can do and the damage it can cause. The main concern is that not enough tests are being done to ensure it is safe.

    Do you ever pull your phone out of your pocket, thinking it is vibrating(振动), only to find that it isn't? This phenomenon, which scientists call "phantom(幻觉的)phone vibration", is very common. Around 80% of people surveyed say they have imagined their phones vibrating when they were actually still.

    So, what leads to this universal behavior? According to the BBC, the explanation lies in your brainˈs ability to discover signals from the outside world. When your phone is in your pocket, there are two possible states: it is either vibrating or not. Meanwhile, you also have two possible states of mind: the judgment that the phone is vibrating, or that it isn't. Ideally, you match the four states correctly.

However, sometimes your brain decides that the results of missing a call are more serious than a "false alarm". Therefore, you become more sensitive(敏感的) to vibrations so that you don't miss anything. This is just like the fire alarm in your home—it can be annoying when it goes off in response to just a tiny bit of smoke. But that's a small price to pay compared to a fire really breaking out because the alarm fails to alert you. Now, you might still ask: why can't our brains just make every judgment correctly without being too sensitive to false signals? The answer is that your brain bears a heavy burden every day. "You get a large amount of sensory(感觉的) information that's coming from your eyes, ears and skin, and you can't deal with all that information all the time, "Michael Rothberg, a researcher at Baystate Medical Center in Springfield, US, told Live Science.

    For example, the rustling(沙沙声)of clothing or the growling(咕咕声)of your stomach may both lead your brain to believe that they come from the vibration of your phone-it is like trying to hear your name being called in a noisy room.

    So, perhaps you should just check your phone whenever you think it's vibrating. It's not too much trouble to do that, is it?