At 27, after serving in World War II, I dreamed of owning a piece of land. So I moved from central Illinois to Shelbina, Missouri, and bought 236 acres for $6,000. The land was situated on a dirt road and was half farmland and half trees, with an old house that had no running water or electricity. Obviously, it was not what you'd call a perfect farm. But it was mine.

    I was alone for the first time in my life, and I found it liberating. My days were filled from dawn until dusk with plowing and planting corn. Dinnertime came and went, and I barely remembered to eat.

    I wouldn't say I was a great success at farming in Missouri. However, when I went to the store to buy some tools, I met a nice woman named Claudette working behind the counter. I also ran into her at St. Mary's Catholic Church in Shelbina each week. I found out later that her manager kept asking her about “that tall boy from Illinois living out in the country in an old house with no water, no electricity and no housekeeper.”

    Claudette and her sister soon visited my farm and put up some curtains. To show my appreciation, I took Claudette out for a ride in my truck. We married in 1954 and have now been together for more than 62 years!

    I later sold the Missouri farm for a $3,500 profit and bought 40 acres in Illinois. For many reasons, buying the Missouri farm was a good idea. I will always cherish memories of owning the farm and meeting my beloved.

    Up to 90% of school leavers in major Asian cities are suffering from myopia — short-sightedness, a study suggests. Researchers say the “extraordinary rise” in the problem is being caused by students working very hard in school and missing out on outdoor light.

    Eye experts say that you are short-sighted if your vision is blurred(模糊的) beyond 2m. It is often caused by an elongation (拉伸) of the eyeball that happens when people are young. According to the research, the problem is being caused by a combination of factors — a commitment to education and lack of outdoor light.

    Professor Morgan who led this study argues that many children in South East Asia spend long hours studying at school and doing their homework. This in itself puts pressure on the eyes, but exposure to between two and three hours of daylight helps maintain healthy eyes.

    Cultural factors also seem to play a part. Across many parts of South East Asian children often have a lunchtime nap. According to Professor Morgan they are missing out on natural light to prevent short-sightedness.

    A big concern is the numbers of the students suffering from “high” myopia. One in five of these students could experience severe visual impairment(障碍) and even blindness. These people are at considerable risk-sometimes people are not told about it and are just given more powerful glasses-they need to be warned about the risk and given some self-testing measures so they can get to an ophthalmologist and get some help.

    For decades, researchers believed there was a strong genetic component to the condition. But this study strongly suggests an alternative view. “Any type of simple genetic explanation just doesn't fit with that speed of change; gene pools just don't change in two generations. Whether it's a purely environmental effect or an environmental effect playing a sensitive genome, it really doesn't matter, the thing that's changed is not the gene pool—it's the environment.”

    You probably know who Marie Curie was, but you may not have heard of Rachel Carson. Of the outstanding ladies listed below, who do you think was the most important woman of the past 100 years?

    Jane Addams (1860-1935)

    Anyone who has ever been helped by a social worker has Jane Addams to thank. Addams helped the poor and worked for peace. She encouraged a sense of community by creating shelters and promoting education and services for people in need. In 1931, Addams became the first American woman to win the Nobel Peace Prize.

    Rachel Carson (1907-1964)

    If it weren't for Rachel Carson, the environmental movement might not exist today. Her popular 1962 book Silent Spring raised awareness of the dangers of pollution and the harmful effects of chemicals on humans and on the world's lakes and oceans.

    Sandra Day O'Connor (1930-present)

    When Sandra Day O'Connor finished third in her class at Stanford Law School, in 1952, she could not find work at a law firm because she was a woman. She became an Arizona state senator (参议员) and, in 1981, the first woman to join the U.S. Supreme Court. O'Connor gave the deciding vote in many important cases during her 24 years on the top court.

    Rosa Parks (1913-2005)

    On December 1,1955, in Montgomery, Alabama, Rosa Parks would not give up her seat on a bus to a white passenger. Her simple act landed Parks in prison. But it also set off the Montgomery bus boycott. It lasted for more than a year, and kicked off the civil-rights movement. “The only tired I was, was tired of giving in,” said Parks.

    Last summer, bird-watchers confirmed the discovery of a new species of bird in Cambodia was not an event of particular biological significance, but it was striking for one reason in part. This species of bird was discovered not in an unspoiled rain forest but within the limits Cambodia's capital, Phnom Penh – a city the size of Philadelphia.

What the researchers found was surprising in cities. The medium-sized city in the state about 110 species of birds, over 95 percent of which would have been growing there urbanization. Ecologically speaking, cities are different, concrete buildings. Rather, each unique bio-profile – a kind of ecological fingerprint – that is against the idea of an environment dead zone.

    Of course, it's also true that in the world of birds and plants, as in human society, there is such a thing as worldwide—the city-inhabitants who feel equally at home in San Francisco, Milan and Beijing. Four birds occur in more than 80 percent of the cities studied, and 11 plants occurred in more than 90 percent of the cities. On the plant side, those are seemingly spread by European settlement. In the air, it's the usual suspects: the rock pigeon and many other birds. “They have become completely adapted to urban life,”Katti says. “That's not much of surprise. But they don't actually dominate as much as we think they do.” Those species—occurring in the cities across the globe—represent only a small part of a city's natural varieties.

    Not all cities are equal protectors of native animals and plants, though. One of the biggest predictors for a city's biodiversity is its urban design. Territory as varied as backyards and street trees can lay important roles in greening a city. In fact, the amount of green space is a stronger predictor of the density of biodiversity than a city's size. A metropolis with a sizable network of parks can contain more species per square mile than a much smaller city.

    In a world where architecture, food, language, fashion and commerce are increasingly globalized, a city's native animals and plants can be a kind of identity. There may be neighborhoods in London and Paris that resemble Singapore or Hong Kong. Cities are becoming similar, but their natural environments stand completely apart.

    There's a new frontier (新领域) in 3D printing that's beginning to come into focus: food. Recent development has made possible machines that print, cook, and serve foods on a mass scale. And the industry isn't stopping there.

    Food production

    With a 3D printer, a cook can print complicated (复杂的) chocolate sculptures and beautiful pieces for decoration on a wedding cake. Not everybody can do that—it takes years of experience, but a printer makes it easy. A restaurant in Spain uses a Foodini to “re-create forms and pieces” of food that are “exactly the same,” freeing cooks to complete other tasks. In another restaurant, all of the dishes and desserts it serves are 3D-printed, rather than farm to table.

    Nutrition

    Future 3D food printers could make processed food healthier. Hod Lipson, a professor at Columbia University, said, “Food printing could allow consumers to print food to meet their own nutritional needs, like vitamins. So instead of eating a piece of yesterday's bread from the supermarket, you'd eat something baked just for you on demand.”

    Challenges

    Despite recent advancements in 3D food printing, the industry has many challenges to overcome. Currently, most ingredients must be changed to a paste (糊状物) before a printer can use them, and the printing process is quite time-consuming, because ingredients interact with each other in very complex ways. On top of that, most of the 3D food printers now are restricted to dry ingredients, because meat and milk products may easily go bad. Some experts are skeptical about 3D food printers, believing they are better suited for fast food restaurants than homes and high-end restaurants.

    HONG KONG-Cross-border buses operated by Hong Kong companies on Friday started trial runs on the Hong Kong-Zhuhai-Macao Bridge (HZMB) in preparation for the bridge's upcoming opening.

    "The trial runs, arranged by the governments of the Chinese mainland, the Hong Kong Special Administrative Region (SAR) and the Macao SAR, would last for three days and aimed at testing the readiness of boundary crossing facilities (设施) of the three places," the Hong Kong SAR government's Transport and Housing Bureau told Xinhua.

    Two major cross-boundary coach trade associations in Hong Kong were invited to send buses and members to participate in the trial runs.

    Freeman Cheung, secretary of Hong Kong Guangdong Boundary Crossing Bus Association, said his association would run one bus with about 10 passengers on Friday and Saturday respectively as part of the trial runs.

    "Our bus started at noon from the Hong Kong Boundary Crossing Facilities and ran all the way to Zhuhai in about 40 minutes," he said, adding that "the journey was smooth."

    Alan Chan, secretary of another trade association who participated in the trial runs as a passenger, said the clearance procedures at boundary crossing facilities of the three places all went on well and smoothly.

    "The boundary crossing facilities of Zhuhai and Macao, in particular, are operated in a collaborative (合作的) way, which helps remarkably shorten the time needed for the clearance procedures," he said.

    The HZMB, situated at the waters of Lingdingyang of Pearl River Estuary, is a mega-size sea crossing linking the Hong Kong SAR, Zhuhai city of Guangdong Province and the Macao SAR.

    The 55-km bridge is the longest bridge-and-tunnel (隧道) sea crossing in the world.

    The bridge is meant to meet the demand of passenger and freight land transport among Hong Kong, the Chinese mainland and Macao, and to establish a new land transport link between the east and west banks of the Pearl River.