Augusto Esquivel is a sculptor who, in his own words, is “crazy with comparisons of reality and potential and the balance between them.” Perhaps the best example of what he's talking about are his most famous creations: the suspended(悬挂的) button sculptures.

    Made entirely from buttons hanging on various lengths of string, Esquivel's sculptures are made to look like common objects: a piano, a gumball machine, and even a toilet. If it wasn't for the clear string hanging above, these objects, these sculptures, would look solid, yet you can put your hands right through them. The process starts with him deciding on a subject and setting the acrylic （丙烯酸树脂）from where the buttons are being suspended. He buys buttons of different shapes and sizes, paints them with spray paint, and carefully hangs them. After that, it's a manner of hanging each individual button, which takes a lot of time. For his piano, for example, he individually hung over 60 pounds worth of tiny buttons.

    Esquivel's sculptures, while mostly housed inside art galleries, perfectly capture one of the main principles of street art: something that is eye-catching and something that invites interaction. Often the best sculptures outside the art galleries aren't the ones behind guards and fencing, but the ones people can go right up to and touch. In Vancouver, a series of laughing old men are attracting people for pictures and to just generally hang around, but the people who simply walk by and see the sculptures almost always leave with a smile on their face. That's good street art: it draws the viewer in rather than relying on a gallery to draw in an audience and point them to certain pieces.

    Esquivel's art is not only a presentation of talent, something that mentions larger philosophical questions, like the ones he stated above, but also just the right combination of interesting idea and painstaking work. One can look at his work in a critical way, or simply appreciate his idea and execution(艺术品的制作).

    Humans were designed to stand upright(直立). And yet in this modern world, too many of us spend our days with our heads lowered for a simple reason: we're staring at the tiny screen of a smart phone.

    People spend an average of 2 to 4 hours each day with their neck bent while shooting off emails or texts. That's 700 to 1,400 hours a year. The success of social media has led to a rapid development of bad smart phone posture.

    The average adult head weighs 10 to 12 pounds when it's in the upright position. However, because of the gravity, bending your head at a mere 15 degree puts 27 pounds of pressure on your spine(脊椎)；a 30 degree neck bend could equal(等于) 40 pounds of pressure; a 45 degree bend adds the force of 49 pounds, according to the research from Dr. Kenneth Hansraj from New York. These stresses may lead to many problems.

    It's no secret that correct posture is better for your back. According to the researchers, good posture is described as ears aligned(成一条直线) with the shoulders. In proper alignment, spinal stress disappeared. It is the best position for the spine. Standing tall doesn't just make you look better; it improves your health, too. Other studies have found good posture has even been connected to ways of behaving. People who have poorer posture often have poorer physical and emotional health.

    The researchers describe bad posture（姿势）as “the head in a forward position and the shoulders dropping forward in a rounded position”. Bad posture has been connected to many medical problems, including headaches and other problems, depression and heart disease. This is why Hansraj said it's important to be mindful of your smart phone posture. While it is nearly impossible to avoid the technologies that cause these problems, people should make an effort to look at their phones with a correct posture.

    See our editors' top 5 picks in print books and Kindle books, and discover our editors' picks for the best books of the year.

    # 1 Killers of the Flower Moon: The Osage Murders and the Birth of the FBI by David Grann

    In Killers of the Flower Moon, David Grami revisits a shocking series of crimes in which dozens of people were murdered in cold blood. Based on years of research and new evidence, the book is a masterpiece of narrative nonfiction.

    Kindle: $14.99 Hardcover: $ 17.37 Paperback: $15.36

    # 2 Little Fires Everywhere by Celeste Ng

    Little Fires Everywhere explores the weight of secrets, the nature of art and identity, and the fierce pull of motherhood and the danger of believing that following the rules can avoid disaster,

    Little Fires Everywhere is the perfect gift for the holidays!

    Kindle: $13.99 Hardcover: $ 20.96 Paperback: $ 12.95

    # 3 Bear Town by Fredrik Backman

    It is a novel about a forgotten town bothered by scandal and the amateur hockey team that might just change everything into a better place. Winning a junior ice hockey championship might mean everything to the residents of Beartown.

Kindle: $10.99 Hardcover: $ 12.95

    # 4 Exit West by Mohsin Hamid

    Profoundly intimate and powerfully inventive, Exit West tells an unforgettable story of love, loyalty, and courage that is both completely of our time and for all time.

Kindle: $12.99 Hardcover: $ 15.73 Paperback: $11

    # 5 Homo Deus: A Brief History of Tomorrow by Yuval Harari

    Yuval Noah Harari, author of the international phenomenon Sapiens, returns with an equally original and attractive book, turning his focus toward humanity's future, and our quest to upgrade humans into gods.

    Kindle: $17.99 Hardcover: $ 28.95 Paperback: $22.99

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    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.

    Back in 2009, China was wrongly accused by the West of "controlling" the Copenhagen talks on climate change. By then China had truly carried out strict policies to reduce the energy consumption of economic activities and at the international level, the top Chinese leaders participated in round-clock efforts to cooperate with the major players to build a united front for efforts to solve global warming. But China was finally misjudged.

    This misjudgment caused China's scholars to rethink China's climate change communicative ways. Among them was Zheng Baowei, journalism professor of Renmin University of China, who realized China had to better shape its communication on its environmental protection.

    Delightfully, the efforts have paid off. Zheng set up a top-level international group advising his research team. He is in charge of doctoral candidates on climate change communication. Climate awareness surveys have been conducted, and a package of communication tools has been designed. Many seminars have been arranged.

    Recently, he arranged a seminar on climate change and health communication on the changing situation both in China and the world. First of all, this stressed that China's policy has developed from reducing its energy consumption and pollution prevention to the important goals of achieving a "Beautiful China" and "'Healthy China, "while coming up with plans to realize an ecological civilization since late 2012. With such goals, China played a leading role in securing the Paris climate change deal in 2015 together with the United States and European Union. In Paris, China promised to let out its carbon to the maximum in 2030.

    It is a demanding job communicating climate change and other topics of lasting development well. Despite that, some foreign scholars have realized China's smart ways in presenting the green concepts. They appreciated China's idea of building a "Beautiful China" and "Healthy China" and said it can he expanded into an idea of a "Beautiful World" and "Healthy World".

    Looking back from how China had followed the steps of the industrialized countries in advocating climate fight, people find now its own green ideas are being recognized.

    In the famous fairy tale, Snow White eats the Queen's apple and falls victim to a curse(诅咒);in Shakespeare's novel, Romeo drinks the poison and dies; some ancient Chinese emperors took pellets(药丸)that contained mercury(水银), believing that it would make them immortal, but they died afterward.

    Poison(毒药) has long been an important ingredient in literature and history, and it seems to always be associated with evil, danger and death. But how much do you really know about poison?

    An exhibition, The Power of Poison, opened last month at the American Museum of Natural History in New York, intended to give the audience a more vivid understanding of poison.

    The museum tour starts in a rainforest setting, where you can see live examples of some of the most poisonous animals: caterpillars(毛毛虫), frogs and spiders. Golden poison frogs, for instance, aren't much bigger than a coin, but their skin is covered with a poison that can cut off the signaling power of your nerves, and a single frog has enough venom to kill 10 grown humans.

    "Poisons can be bad for some things," Michael Novacek, senior vice president of the museum, told NBC News. "Yet they can also be good for others."

    A poisonous chemical found in the yew tree is effective against cancer, which is what led to the invention of a cancer-fighting drug called Taxol.

    The benefits from natural poisons are not limited to just medicine. Believe it or not, many substances(物质)that we regularly ingest(摄入)-chili, coffee and chocolate-owe their special flavors or stimulating(提神的)effects to chemicals that plants make to poison insects.