The famous director of a big and expensive movie planned to film a beautiful sunset over the ocean, so that the audiences could see his hero and heroine in front of it at the end of the film as they said goodbye to each other forever. He sent his camera crew out one evening to film the sunset for him.

    The next morning he said to the men, “Have you provided me with that sunset?”

    “No, sir,” the men answered.

    The director was angry. “Why not?”  he asked.

    “Well, sir,” one of the men answered, “we're on the east coast here, and the sun sets in the west. We can get you a sunrise over the sea, if necessary, but not a sunset.”

    “But I want a sunset!” the director shouted. “Go to the airport, take the next flight to the west coast, and get one.”

    But then a young secretary had an idea. “Why don't you photograph a sunrise,” she suggested, “and then play it backwards? Then it'll look like a sunset.”

    “That's a very good idea!” the director said. Then he turned to the camera crew and said, “Tomorrow morning I want you to get me a beautiful sunrise over the sea.”

    The camera crew went out early the next morning and filmed a bright sunrise over the beach in the middle of a beautiful bay. Then at nine o'clock they took it to the director. “Here it is, sir,” they said, and gave it to him. He was very pleased.

    They all went into the studio. “All right,” the director explained, “now our hero and heroine are going to say goodbye. Run the film backwards so that we can see the ‘sunset' behind them.”

    The “sunset” began, but after a quarter of a minute, the director suddenly put his face in his hands and shouted to the camera crew to stop.

    The birds in the film were flying backwards, and the waves on the sea were going away from the beach.

    In June 2014, two leading media in America reported that three-year-old Victoria Wilcher, who suffered facial scarring, was kicked out of a KFC because she was a frightening customer. Later, KFC announced that no evidence had been found to support the story. This phenomenon is largely a product of the increasing pressure in newsrooms that care more about traffic figures.

    Brooke Binkowski, an editor, says that she has seen a shift towards less responsibility in newsrooms. “Clickbait is king, so newsrooms will uncritically print something unreal. Not all newsrooms are like this, but a lot of them are.”

    Asked what the driving factor was, a journalist said, “You've a strict editor and you've to meet your targets. And some young journalists are inexperienced and will not do those checks. So much news reported online happens online. There is no need to get out and knock on someone's door. You just sit at your desk and do it.”

    Another journalist says, “More clicks equal more money. At my former employer in particular, the pressure was due to the limited resources. That made the environment quite horrible to work in.”

    In a Feb. 2015 report for Digital Journalism, Craig Silverman wrote, “Today the bar for what is worth giving attention to seems to be much lower. Within minutes or hours, a badly sourced report can be changed into a story that is repeated by dozens of news websites, resulting in tens of thousands of shares. The rumor becomes true for readers simply by virtue of its ubiquity.”

    And, despite the direction that some newsrooms seem to be heading in, a critical eye is becoming more, not less important, according to the New York Times' public editor, Margaret Sullivan. “Reporters and editors have to be more careful than ever before. It's extremely important to question and to prove before publication.” Yet those working in newsrooms talk of doubtful stories being tolerated. In the words of some senior editors, “a click is a click, regardless of the advantage of a story”. And, “if the story does turn out to be false, it's simply a chance for another bite at the cherry.”

    We all know that the cost of heating our homes will continue to be a significant burden on the family budget. Now millions of people are saving on their heating bills with the EP portable heater. With over one million satisfied customers around the world, the new EP heats better and faster, saves more on heating bills, and runs almost silent.

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    The EP will not reduce oxygen in the room. With other heaters, you'll notice that you get sleepy when the heat comes on because they are burning up oxygen.

    The advanced EP also heats the room evenly, wall to wall and floor to ceiling. It comfortably covers an area up to 350 square feet. Other heaters heat rooms unevenly with most of the heat concentrated to the center of the room. And they only heat an area a few feet around the heater. With the EP, the temperature will not vary in any part of the room.

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    How does an ecosystem（生态系统）work? What makes the populations of different species the way they are? Why are there so many flies and so few wolves? To find an answer, scientists have built mathematical models of food webs, noting who eats whom and how much each one eats.

    With such models, scientists have found out some key principles operating in food webs. Most food webs, for instance, consist of many weak links rather than a few strong ones. When a predator（掠食动物）always eats huge numbers of a single prey（猎物）, the two species are strongly linked; when a predator lives on various species, they are weakly linked. Food webs may be dominated by many weak links because that arrangement is more stable over the long term. If a predator can eat several species, it can survive the extinction（灭绝）of one of them. And if a predator can move on to another species that is easier to find when a prey species becomes rare, the switch allows the original prey to recover. The weak links may thus keep species from driving one another to extinction.

Mathematical models have also revealed that food webs may be unstable, where small changes of top predators can lead to big effects throughout entire ecosystems. In the 1960s, scientists proposed that predators at the top of a food web had a surprising amount of control over the size of populations of other species—including species they did not directly attack.

    And unplanned human activities have proved the idea of top-down control by top predators to be true. In the ocean, we fished for top predators such as cod on an industrial scale, while on land, we killed off large predators such as wolves. These actions have greatly affected the ecological balance.

    Scientists have built an early-warning system based on mathematical models. Ideally, the system would tell us when to adapt human activities that are pushing an ecosystem toward a breakdown or would even allow us to pull an ecosystem back from the borderline. Prevention is key, scientists says because once ecosystems pass their tipping point（临界点）, it is remarkably difficult for them to return.

    Homebuyers nationwide are watching housing prices go up, up, and up. "How high can they go?" is the question on everyone's lips.

    It's crazy, "said Tim, who is looking for a house near the beach. "In 1993, I bought a two-bedroom house in Venice for $70，000. My friends thought then that I was overpaying. Five years later, I had to move. I sold it for $230，000, which was a nice profit. Last year, the exact same house was for sale for S510, 000!

    It is a seller's market. Homebuyers feel like they have to offer at least 10% more than the asking price. Donna, a new owner of a one-bedroom house in Venice Beach, said, "That's what I did. I told the owner that whatever anyone offers you, I'll give you $20,000 more, under the table, so you don't have to pay your realtor(房地产经纪人) any of it. I was tired of looking.”

    Tim said, "Whether you decide to buy or decide not to buy, you still feel like you made the wrong decision. If you buy, you feel like you overpaid. If you don't buy, you want to kick yourself for passing up a great opportunity.”

    Everyone says the bubble has to burst sometime, but everyone hopes it will burst the day after they sell their house. Even government officials have no idea what the future will bring. "All we can say is that, inevitably, these things go in cycles," said the state director of housing. "What goes up must come down But, as we all know, housing prices always stay up a little higher than they go down. So you can't lose over the long run. Twenty years down the road, your house is always worth more than you paid for it.”

Nowadays, the term "superfood" has become the nutritional buzzword. Simply put, these superfoods are those that provide large amount of nutrients through minimal calories. 

The term "superfood" may have taken the modern food scene by storm. {#blank#}1{#/blank#} Although only popular in recent years, the concept of certain foods with special nutritional qualities has been around for a long time. The nickname "superfood" gained widespread popularity in the early 2000s as health enthusiasts and the food industry sought to identify and market foods with special health benefits. Today, it is a trend in diet. 

In an age when we share all kinds of superfoods on social media, ignoring the phenomenon is impossible. {#blank#}2{#/blank#} It's easy to understand. These nutritional superheroes offer a perfect combination of substance and style, tailored for the digital generation. Their lively colours, exotic origins and impressive nutrient profiles make them candidates for the next viral food trend. 

{#blank#}3{#/blank#} They offer a lifestyle that reflects the global shift towards a more healthconscious society. As the world wrestles with an increasing burden of diseases and the fast pace of modern life, people are seeking dietary solutions from superfoods. {#blank#}4{#/blank#} They are rich in vitamins and minerals that can strengthen your immune system, avoid chronic diseases, and improve your overall wellbeing. Another remarkable benefit is their potential to promote heart health, helping you build a strong heart. Don't forget their role in skin regeneration. The antioxidants(抗氧化物) can provide a natural glow, reduce skin ageing and fight against skin conditions. 

{#blank#}5{#/blank#} Superfoods, while nutritionally dense, should be part of a comprehensive diet rather than the only guarantee of our health.