It was the day after Halloween when my grandmother was admitted to the hospital with the worst headache she'd ever had. While posing in our costumes the night before, we knew something was wrong, just not how wrong.

    Grandma's house was the central gathering place of my family. Sunday lunches, birthday dinners, Easter, Thanksgiving, and Christmas — all were our traditions, with her as hostess. While my parents were busy running their small business, there were many nights when Grandma fed me and put me to bed in her spare room, until they came to get me. I spent my summers at Grandma's and I went everywhere with her. I couldn't imagine a time when she wouldn't be around me.

    Then November 1,1991 began her month-long stay in the hospital—she suffered from a rare infection (感染)called nocardia asteroides. After being born in the year of the Great Depression, living through World War II, raising three kids, and being widowed at the age of 48, Grandma never expected to live into her seventies. The infection in her brain seemed to confirm that she wasn't long for this world. But that's not the end of her story. A team of doctors successfully removed the abscess(脓肿), and Grandma even made it into a local medical journal. Her doctor called her “the brain lady”.

    Grandma celebrated her 85^th birthday in March this year. In the almost 23 years since her recovery, she's seen two of her four grandchildren get married and welcomed three great-grandsons. Although they damage something in her house, she loves it when my two boys come over. And while I know they make her day, seeing her love blossom for another generation makes my day too. Happy Grandparents' Day to my amazing grandmother!

    Coca-Cola has created a publicity stunt (作秀) in Singapore — a vending machine (自动售货机) which gives out free cans of Coke in return for (作为对…回报) hugs. The whacky idea is part of the company's Open Haziness campaign (运动) designed to attract young people in Singapore.

    Students at the National University of Singapore were surprised to find that the soft drinks company had placed the machine in the schoolyard. But instead of the drinks brand's logo (标志), the words “Hug Me” are written across its red-and-white logo. Instead of paying money, customers have to hug the drinks machine to receive a free can of Coke.

    Public displays of affection are uncommon and have long been discouraged in Singapore, but are on the rise among young people. The move is part of a campaign created by advertising firm Ogilvy & Mather, intended to let the youth to see the brand as a non-threatening (无威胁的) friend.

    Leonardo O'Grady, leader of the campaign, said, “Happiness is contagious (传染的). The Coca-Cola Hug Machine is a single idea to spread some happiness. We want to spread happiness in an unexpected, creative way to attract not only the people present, but the audience at large.”

    He hopes that it will encourage consumers to bring positivity, optimism (乐观) and fun into their lives and to open a Coke, sharing a little happiness.

    The machines haw been such a success that there are plans to roll them out across Asia. Mr. O'Grady added, “The reaction was amazing — at one point we had four to five people hugging the machine at the same time as well as each other! In fact, there was a long line of people looking to give hugs.”

    Bees and other pollinators（传粉者）  use smells to track down fresh flowers. Air pollutants can weaken those scents（气味）.  Scientists had worried this might make it harder for some pollinators to find a meal.

    Many animals help pollinate plants. Species that do this include bees, butterflies, etc. But for many reasons, the pollinators available to help plants in this way are decreasing. Scientists think a loss of habitat（栖息地）can be one factor. Diseases and exposure to poisonous chemicals also count.

    Jose Fuentes points to air pollution as another possible factor. He's an atmospheric scientist at Pennsylvania State University. In an earlier study, he showed some air pollutants could weaken or destroy scents emitted(发出)by flowers.

    Searching for a meal leaves pollinators out in the open and at risk of becoming other animal's lunch. And any time spent hunting food is time away from their duties back home, like protecting a hive（蜂巢）or nest, explains T'ai Roulston. He's an insect biologist at Virginia University. Roulston worked with Fuentes on the new study.

    In the study, the researchers focused on five kinds of representative scent molecules(分子)plants emit. One molecule they looked at, for example, is called beta-myrcene. Many flowers give off this chemical into the air.  Normally, this gas can travel some 800 meters from its flower source. But in polluted air, this same molecule could travel only half as far.

    Worse still, air pollution might do more than just weaken scent plumes（气味烟云）．Chemical reactions between air pollutants and plumes may transform the flowers' smells, creating new scents. And these scents may be unrecognizable to pollinators.

    That's certainly Fuentes' concern.  So, he says his next research project will look at how insects handle any new flower scent. "It's possible that some insects will change ways to detect and use these new molecules to find food," he says.

    For Pei Shiyou, this year's Lunar New year's Eve was among the few he ha spent with his extended family.

“It's one of the benefits of starting a business in my hometown,” said Pei, who was born and raised in Hefei, Anhui province, and will soon turn 60. His wish for the Year of the Dog is to see smart glass— the product his team has been developing since 2016—go into production.

    Starting a business with a creative research team and receiving government support have given him a strong sense of pride, a feeling he says he often lacked during his 25 years working in the United States, he said.

    He was among Chinas first students to travel to the US for postgraduate stud. After that, he landed his first job at Amoco Corp and later moved to California eventually becoming head of product research and development at KLA-Tencor, a global capital equipment company in Silicon Valley. Yet Pei said he still felt unfulfilled and unsatisfied.

    “It seemed there was an invisible ceiling for me when I pursued my career in the US. I felt like it was unlikely for me to achieve any higher sense of achievement or recognition.”

    He returned to China in 2017, and nine years later established a smart-glass company in Hefei with two other US-trained engineers.

    The company's product is suitable for low-temperature, flexible smart-film manufacturing and is able to self-adjust its level of transparency based on temperature changes and sunlight conditions, according to Pei, who said it has the potential to reduce the need for air conditioning and make curtains abandoned.

    Between 2007 and 2016, Pei lived and worked in several Chinese cities. “What attracts me to Hefei is that it is easy to gather tech talents here due to the city's rapid development in recent years, and also because it has several universities,” he said. Support from the local government has been one of the best attractions that convinced Pei to locate his company in the eastern Chinese city.

    In January last year, Hefei was approved as the site of a national-level science center, the second of its kind after an earlier one was built in Shanghai. The center, now under construction, will focus on areas including information technology, energy and health.

Discover Nature Schools Programmer

    Becoming Bears (Kindergarten—2 grade)

    By becoming baby bears, children learn from their "parent" to survive the seasons. Kids will find safety in the spring and learn kinds of food bears eat during the summer, and then create a cave for winter hibernation (冬眠). After learning the skills needed to survive, students will go out of the cave as an independent black bear able to care for themselves.(1.5—2 hours)

    Whose Clues? (3—5 grade)

    Kids will discover how plants and animals use their special structures to survive. Through outdoor study of plants and animals, kids will recognise their special structures and learn how they enable species to eat, avoid their enemies and survive. Using what they have learnt, kids will choose one species and tell how they survive in their living places.(3—4 hours)

    Winged Wonders (3—5 grade)

    Birds add colour and sound to our world and play an important ecological (生态的) role. Students will learn the basics of birds, understand the role birds play in food chains and go bird watching using field guides and telescopes. Students will do hands－on activities. Students will use tools to build bird feeders, allowing them to attract birds at home.(3—4 hours)

    Exploring Your Watershed (6—8 grade)

    We all depend on clean water. Examining how our actions shape the waterways around us. Go on a hike to see some of the first－hand challenging water quality problems in a city. Students will test the water quality to determine the health of an ecosystem.

    Each programme is taught for a class with at least 10 students.

    All programmes include plenty of time outdoor. So please prepare proper clothing, sunscreen and insect killers for children.

    To take part in a programme, please e－mail dcprogrammes@mdc.mo.gov.

    Although not as much as in the past, grandparents are the teachers of the Navajo (纳瓦霍人) youth. They make young people aware of life at an early age. The parents grant them the privilege of teaching the children, and the grandparents take great pride in raising the children or at least having a big part in raising them.

    Young children often stay with their grandparents for years at a time developing a close and trusting relationship. The grandparents teach the children Navajo legends and the principle of life, emphasizing both new culture trends and the preservation of traditions.

    The grandparents are also often the leading figures in teaching the youth the arts of weaving, caring for the livestock, using herbal medicine, and other arts and crafts.

    The children are taught to respect their elders, to care for them, to help them whenever they are in need, and to learn from them. Young people are urged to listen with care to the words of their elders and to keep as much wisdom as possible. Grandparents often go to social gatherings and traditional events, and the young have opportunities to learn more about their culture and traditions.

    I live with my grandmother for thirteen years, and she raised me in the old ways of our people. Although I was going to school, she taught me as much as she could about our traditions. She was a beautiful woman. If I had a chance, I would listen again to her wise teachings, expressed with kindness in a soft voice that touched my heart.

    We used to plant corn and pumpkin every summer. They never grew big enough to feed us, but we planted them anyway. I asked my grandmother why. She said, "Grandson, our plants will be far more beautiful than the flowers outside the fence." I did not understand until one day I saw their beauty as I was coming over the hill with her. She said, "Anything that is a part of you is always far more beautiful than the things which you pass by." We had some beautiful years together. I am glad she is a part of me and I am a part of her.

    Children used to be well disciplined, possessing more respect for culture, tradition, and beliefs than they do now. The world of the Navajo has been influenced by the western world, and the grandparents have less control and influence than they used to. But the young people who have been touched by their teachings have glimpsed a way of life beyond what most people know today.