After suffering through many months of unemployment  (失业). my wife and I moved this week from Colorado to Ohio. where she was starting a new job. Not knowing anybody there. we were pretty concerned about how we'd get our entire home unloaded (卸下) without killing ourselves.

    We made a phone call to hire (临时雇用) a couple of college students to help with all the heavy lifting once we got there. But one neighbor after another stopped by to help us. What ? Have we moved to some other country ? Maybe we've died and gone to heaven!     

    Unloading actually became fun and joy because there were so many wonderful new friends to help when we worked. The more people helped. the easier the work became. We were afraid the job might take days for the two of us alone. but it was finished in a few hours. Many total strangers would either walk by the sidewalk or drive by to ask us if we were moving in. Many were happy that this old house that had sat empty for so long was coming to life again. We were invited to an outdoor meal yesterday by neighbors on the same street.

    All the time. my brain was resting on this new sense of hope that people can be so friendly to strangers. Among all the conversation were lots of offers to help each other in all kinds of ways. It's wonderful to live in such a kind little town. I feel so grateful to be here. and wish the rest of the world could see how an entire community can model  (做榜样) what it's like to help each other.

    A disease called “Panama” is threatening supplies of the world's most popular fruit—banana.Two years ago,the United Nations warned that the "Panama disease" could destroy "much of the world's banana crop."Since then,things have not gotten better.A new outbreak was discovered last year in Australia.The disease started in Asia in the 1990s, and later spread to Africa and the Middle East.

    World health officials worry the disease could travel to Latin America,one of the top banana producers in the world.All this is a big concern because bananas are an important source of income and nutrients for millions of people.They are grown in 135 tropical nations.The United Nations lists bananas as one of the most important foods, along with rice,wheat and corn.

    Randy Ploetz is a professor at the Tropical Research & Educational Center at the University of Florida.Many consider him as America's top banana expert.As he explained,Panama disease affects the Cavendish banana.The Cavendish is one of more than 500 kinds of bananas.But it is the most popular.

    “The industry is waking up to the problem,”Ploetz said.“They are pretty scared.”He was speaking Thursday by telephone from Miami,Florida,where he is among 1,000 people attending the International Banana Congress.The meeting was supposed to take place in Costa Rica,but was moved at the last minute.There were concerns banana growers could spread Panama disease from dirt collected on their shoes,Ploetz said.

    Ploetz said reports that Cavendish banana production could end are not correct.But if the disease spreads to Latin America,it could hurt the world's economy along with food supplies for millions of people.Still,he said there is reason for hope.Scientists in Australia are working on a genetically engineered banana that might not be at risk of getting Panama disease.

    People who play computer games to train their brains might as well be playing Super Mario, new research suggests.

    In a six-week study, experts found people who played online games designed to improve their cognitive(认知的) skills didn't get any smarter.

    More than 8,600 people aged 18 to 60 were asked to play online brain games designed by the researchers to improve their memory, reasoning and other skills, for at least 10 minutes a day, three times a week.

    They were compared to more than 2,700 people who didn't play any brain games, but spent a similar amount of time surfing the Internet. All participants were given an "IQ test" before and after the experiment.

    Researchers said the people who did the brain training didn't do any better on the test after six weeks than people who had simply been on the Internet.

    "If you're(playing these games) because they're fun, that's absolutely fine," said Adrian Owen, assistant director at Britain's Medical Research Council. "But if you're expecting these games to improve your IQ, our data suggests this isn't the case."

    Computer games that are supposed to improve memory, reasoning and other cognitive skills are played by millions of people worldwide, though few studies have examined if the games work.

    "There is precious little evidence to suggest the skills used in these games transfer to the real world," said Art Kramer, a professor of psychology at the University of Illinois, US.

    Instead of playing brain games, Kramer said people would be better off getting some exercise. He said physical activity can help produce new brain cells.

    Other experts said brain games might be useful, but only if they weren't fun.

    "If you set the level for these games to a very high level where you don't get the answers very often and it really annoys you, then it may be useful," said Philip Adey, a professor of psychology at King's College in London.

    If people are enjoying the brain games, Adey said they probably aren't being challenged and might as well be playing a regular video game.

    He said people should consider learning a new language or sport if they really want to improve their brain power. "To stimulate(激发) the intellect, you need a real challenge," Adey said, "Getting smart is hard work."

    Every year, 1.5 million kids around the world die as a result of not getting vaccines (疫苗). This is partly because transporting and storing medicines can be a huge challenge in some countries.

    Anurudh Ganesan, 17, knows this firsthand. When he was a baby in India, his grandparents carried him 10 miles to a health clinic in a remote village to receive a vaccine. But by the time they arrived, the vaccines were no longer usable because they had been overheated.

    Vaccines, Anurudh later learned, must be kept cool to stay effective. But refrigerating them requires electricity or ice – precious resources that many developing countries lack.

    Although Anurudh eventually received the vaccine he needed, his experience as a baby and the sad reality that so many other children aren't as lucky motivated him to take action. The high school student invented Vaxxwagon, a portable vaccine-carrying device that generates its own power to keep lifesaving medicines cool as they're delivered to remote areas around the world.

    Anurudh first got his idea for Vaxxwagon in 2014. He read several textbooks to learn everything he could about refrigeration, and then he did research online to learn more about vaccines. Rather than relying on electricity or ice, Anurudh figured out a way to use wheels to power a refrigeration system for about eight hours. The entire rechargeable cooling system can be pulled to areas in need of vaccines by a bicycle, a car, or an animal. Eventually, Anurudh took his design to professors at Johns Hopkins University for advice. Not only did they confirm Vaxxwagon could work, but they offered him funding to help build it.

    Anurudh was rewarded with the 2015 Google Science Fair LEGO Education Builder Award for his invention. Anurudh says his final goal is to start selling Vaxxwagon to relief organizations, so it can be used to help people around the world.

Anurudh, who plans to pursue engineering degree in college, says, “Don't give up on your ideas. But always try to help others with your projects. That's the point of engineering – to help people.”

    The idea of progress started to flower in the 17th century. At that time, many wise thinkers believed that man liberated（解放） by reason would rise to greater heights of achievement. The many expressions of human nature would be the engines of progress: language, business, science, and moral sensibility （道德感）. Unfortunately, most of those engines have failed to bring the desired human progress.

    The modern age has belonged to material progress and its main source has been science. Science gives people huge power to change the world. But can people be trusted to use it always for good? Think of biotechnology and information technology. And it is not just that scientific progress does not deliver the emotional good. People also fear that mankind is failing to manage science properly. The forests are disappearing; the ice is melting; privacy is leaking; life is becoming a depressing march in an ugly world.

    The point is not that science is harmful, but that scientific progress needs to be mapped tidily onto human progress. That relies on moral sensibility in its widest sense. This liberal force offers hope for a better future. The very idea of moral sensibility probably sounds out-of-date. Bur researchers find that people desire a sense of moral purpose which would give life dignity （尊严）. People want to determine how the world works, not always to be determined by it. Moral sensibility is why people will suffer from their beliefs, and why acts of noble self﹣sacrifice are so powerful.

    It is admitted that our moral ideals will never be realized completely. But sometimes, however imperfectly, we can make progress. Human dignity requires the love of ideals for their own sake, but nothing requires that the love be returned.

Human progress is neither guaranteed nor hopeless. Instead, it is up to us.

    South Africa is the water-lovers' paradise. Whether you want to be by the sea, on the sea or even under it, there are countless ways to get your ocean experience. Almost all of them are located on South Africa's east coast, where the Indian Ocean keeps water warm.

    Thompson's Bay, Ballito

Drive 40 minutes north of Durban to reach the unique coastal town of Ballito. Popular with holidaymakers, Ballito has a choice of pretty beaches—- and the best for swimming is

    Thompson's Bay. This scenic cove (小海湾)is sheltered from the wind and characterized by its calm waters, interesting rocky outcrops and a fascinating geological hole-in-the-wall. There's a walled tidal pool for those who are nervous to swim in the open ocean, making this spot a particularly good choice for families.

    Umhlanga Rocks, Durban

    Located a 20-minute drive from central Durban, the resort town of Umhlanga is an upmarket getaway for vacationing South Africans and visitors in the know. The main Umhlanga Rocks beach boasts safe swimming waters and endless golden sands, again protected by lifeguards and shark nets. A paved walkway provides direct access to the town's beachfront shops, restaurants and bars.

    Gonubie Beach, East London

    The coastal town of Gonubie is seen by many as a suburb of East London, one of the largest cities of the Eastern Cape. Its picture-perfect beach offers great swimming areas in the open sea. The Gonubie River reaches the sea at this point, too, and offers an alternative bathingspot on days when the surf is bigger than usual. All along the river's green banks, you'll find a series of shaded spots perfect for summer picnics and barbecues.