Scientists are debating how to limit their newly-discovered power to change genetic structure (结构). Scientists already modify the genes (基因) of farm animals and agricultural plants to make them more productive or stronger. But now they can also change genes in wild animals and plants. These genes would continue into later generations. For example, it may be possible for scientists to remove from existence the kind of mosquitoes, small flying insects, that carry the Zika virus. They might also be able to permanently remove species (物种) of plants and animals that are damaging to other species.

    In a report published last week, the U. S. National Academies of Sciences, Engineering and Medicine (NAS) said it supports continued research on this kind of gene control. But it warned that it is not possible to know what will happen when these changed plants and animals are released (释放) into the wild.

    Sixteen biologists, ethicists (伦理学家) and policymakers are on an NAS committee that is examining the issue. They say that there is value to the new technology. But, they say, there is not enough evidence to support the release of modified organisms (生物体) from the laboratory into nature.

    Many people would support stopping mosquitoes and rats from carrying diseases. But scientists say we must understand the possible scientific, ethical, legal and social results of such action before we decide whether to take it. Gene modification is spread through reproduction (繁殖).

    Changed genes will continue to spread as long as an animal or plant continues to reproduce. They cannot be limited to a farm or kept within a country's borders. Scientists are wondering what may happen if a modified organism mates with another species. They are not yet sure how the modified genes would affect the other species. It is possible that those genes could harm those creatures or even lead to their disappearance from our planet.

    For anyone still doubting the belief that our emotions influence our physical health, a new study from New Zealand should be able to settle the matter. It reports that the physical wounds of healthy seniors healed more quickly if they wrote about their most upsetting experiences.

    This confirms the results of a 2010 study, and extends those findings to cover older adults—a group that is likely to suffer wounds (as from surgery), and one with less access to other ways of lowering tension (such as exercise).

    Reported in the journal Psychosomatic Medicine, a research team led by the University of Auckland's Elizabeth Broadbent made a study featuring 50 healthy adults ranging in age from 64 to 97. They were asked to write for 20 minutes per day for three consecutive (连续的) days.

    Half were asked to write about the most upsetting experience in their life, describing their deepest thoughts, feelings, and emotions about the events, ideally not previously shared with others. The others were asked to write about their daily activities without mentioning emotions, opinions or beliefs.

    Two weeks after the third day of writing, all participants received a standard 4mm skin biopsy (皮下活体组织检查) on their inner arm. The very tiny wounds caused by the biopsy were photographed regularly over the following days to determine the rate at which they healed.

    On the 11th day after the biopsy, the wounds completely healed on 76.2 percent of those who had done the expressive writing. That was true of only 42.1 percent of those who had written about everyday activities.

    “The biological and psychological mechanisms (机体) behind this effect remain unclear,” the researchers wrote, noting that those who had done the expressive writing did not report lower stress levels or fewer depressive symptoms than the others in the control group. Even if they weren't consciously aware of feeling more relaxed or positive, the expressive writing appeared to have caused some sort of bodily reaction—probably involving their immune systems—that hastened their recovery.

    Hummingbirds (蜂鸟) are very small birds. This small bird is quite an acrobat (杂技演员). Only a few birds, such as kingfishers and sunbirds, can hover, which means to stay in one place in the air. But no other bird can match the flying skills of the hummingbird. The hummingbird can hover, fly backward and fly upside down!

    Hummingbirds got their name because their wings move very quickly when they fly. This causes a humming sound. Their wings move so fast that you can't see them at all. This takes a lot of energy. These little birds must have food about every 20 minutes to have enough strength to fly. Their favorite food is nectar (花蜜). Nectar is the sweet water deep inside a flower. Hummingbirds use their long, thin bills to drink from flowers. When a hummingbird drinks nectar, it hovers in front of a flower. It never touches the flower with its wings or feet.

    Of all the birds in the world, the hummingbird's colors are among the brightest. Some are bright green with red and white markings. Some are purple. One kind of hummingbird can change its color from reddish-brown to purple to red!

    The hummingbird's nest is special, too. It looks like a small cup. The inside of the nest is very soft. This is because one of the things the mother bird uses to build the nest is the silk from a spider's web (蜘蛛网).

    In the years ahead, AI will raise three big questions for bosses and governments. One is the effect on jobs. Although bosses publicly praise the broad benefits AI will bring very much, their main interest lies in cutting costs. One European bank asked a technology company to find a way of reducing the staff in its operations department from 50,000 to 500. This special report has shown that AI-enhanced tools can help reduce staff in departments such as customer service and human resources by a large amount. The McKinsey Global Institute finds that by 2030 up to 375m people, or 14% of the global workers in companies or countries, could have their jobs automated away. Bosses will need to decide whether they are prepared to offer and pay for retraining, and whether they will give time off for it. Many companies say they are all for workers developing new skills, but not at the employer's expense.

    A second important question is how to protect privacy as AI spreads. The Internet has already made it possible to track people's digital（数字的）behaviour in extremely small detail. AT will offer even better tools for businesses to monitor consumers(客户) and workers, both online and in the physical world. Consumers are sometimes happy to go along with this if it results in personalised（个性化的）service. But AI probably brings privacy violations (侵犯) that are seen as shocking and morally unacceptable. In the wrong hands, useful technology could be against fair and equal treatment. Countries with a record of the careful watching of a person place, especially by the police or army and human-rights abuses already using AI to monitor political activity. The police around the world will use AI to spot criminals, but may also look on ordinary citizens secretly, in order to discover things or find out information about them. New rules will be needed to ensure agreement on what degree of monitoring is acceptable.

    The third question is about the effect of AI on competition in business. Today many firms are competing to provide AI-enhanced tools to companies. But a technology company that achieves artificial intelligence could race ahead of competitors, put others out of business and lessen competition. This is unlikely to happen in the near future, but if it did it would be of great concern.

    Do you need help in creating a character for your novel? Well, you have come to the right article.

    Write down your characters full name.

    You can also write down any other name/nickname/title he or she has. Try not to use your name or someone else's name that you know, as this may be considered personal information. You may be writing a mystery and your main character may just be referred to as, for example, the Man, all the way through the novel. Even if in this situation, to add depth to your character, you should know the character inside-out even if the reader will not.

    Describe your character's physical features.

    Does he/she have red or blonde hair? What color is his/her skin? Is he or she a human, animal, robot or imagined creature? Make your character unusual. Describe your character in an interesting way, even if your character is meant to be common or average. The possibilities are vast; just make the descriptive language good, so that it conjures up(使在脑海中显现)the character for the readers.

    Describe the character's personality in detail

    They are all great for working with as a writer, but you must choose a reasonable one that best fits your

Character—don't try to give the character an unlikely combination of many features. Don't give the character merely neutral or good features. Also add the bad habits and weaknesses. Your character is best if presented as defective (in actions, appearance or personality).Your character can make mistakes, have bad habits, and have little interesting strange habits. This is what makes the character interesting.

    Work out a good plot.

    What is a good story without a good plot? Maybe your character has become mixed up with some bad people or a strange mystery. Maybe your character has only months to live and wants to do something great

    But, the plots must be connected to the character. Keep imagining.

    LEGO(乐高) recently announced that they will start producing pieces from sustainable (可持续的) sugar cane. The toys, which will be closely similar to classic ones, will also feature "botanical elements" like leaves, bushes, and trees.

    The pieces will be included in LEGO'S box sets from this year onwards. The move is part of the Danish company's campaign to use sustainable materials in its products by 2030.

    However, Tim Brooks, the firm's vice-president, said, "We want to make a positive influence on the world around us, and are working hard to make great play products for children using sustainable materials. This is a great first step in our goal to make all LEGO pieces using sustainable materials."

    The new line of production has reportedly already started with pieces being produced from polyethylene, which is a soft and durable plastic (耐用的塑料). LEGO says that we needn't worry about the quality of the new products, as they've tested the plant-based plastic to ensure that it meets the high standards for quality and safety that consumers (消费者) expect from the company.

    "LEGO products have always been about providing high quality play experiences and giving every child the chance to shape their own world through inventive play. Children and parents will not notice any difference in the quality or appearance of the new pieces, because plant-based polyethylene has the same qualities as traditional polyethylene," said Tim Brooks.

    "It is important that companies in each industry find ways to help ensure a future where people, nature, and the economy grow healthily," said Alix Grabowski, an officer at WWF. "The LEGO Group's decision to use sustainable plastics represents a great opportunity to reduce dependence on finite (有限的) resources, and their work with the Bioplastic Feedstock Alliance will allow them to connect with other companies to continue to think creatively about sustainability."