What does it mean to say that we live in a world of persuasion? It means that we live among competing interests. Your roommate's need to study for an exam may take priority (优先) over pizza. Your instructor may have good reasons not to change your grade.

    In such a world, persuasion is the art of getting others to give fair and favorable consideration to our points of view. When we persuade, we want to influence how others believe and behave. We may not always prevail — other points of view may be more persuasive, depending on the listener, the situ­ation, and the merit of the case. But when we practice the art of persuasion, we try to ensure that our position receives the attention it deserves.

    Some people, however, object to the very idea of persuasion. They may regard it as an unwelcome interruption into their lives. Just the opposite, we believe that persuasion is unavoidable — to live is to persuade. Persuasion may be ethical (合乎道义的) or unethical, selfless or selfish, inspiring or degrad­ing. Persuaders may enlighten our minds or get our vulnerability(脆弱之处). Ethical persuasion, however, calls on sound reasoning and is sensitive to the feelings and needs of listeners. Such persuasion can help us apply the wisdom of the past to the decisions we now must make. Therefore, the most basic part of edu­cation is learning to resist the one kind of persuasion and to encourage and practice the other.

    Beyond its personal importance to us, persuasion is necessary to society. The right to persuade and be persuaded is the bedrock of the American political system, guaranteed by the First Amendment to the Constitution (美国宪法).

    How the Grand Canyon (大峡谷) was created remains one of the geology's greatest mysteries. Some evidence suggests that the process was a gradual one in which the Colorado River (which runs through the canyon) slowly cut deeper and deeper into the ground over millions of years. But volcanic rock samples taken from the canyon now suggest that the canyon was down-cut instead.

    Down-cutting is when a flood of water rushes over a landscape (地形) with enough force to cut deeply into the ground and leaves behind a canyon. Such a flood is usually released when a natural or man-made dam (堤坝) bursts.

    Robert Webb, a research geologist, says natural dams seem to have formed and broken across the Colorado River several times during the last million years. The dams were built when lava(熔岩) from the eruptions of nearby volcanoes flowed into the river. The lava hardened into hard rocks and blocked the river, causing it to back up and form a lake. Each time the lake grew so huge that it broke the rock dam, releasing a flash flood that furthered the down-cutting process and deepened the canyon.

    Down-cutting is not just an earthly event. Satellite photos sent back from Mars suggest that the process has happened there, too, say many other researchers.

    The photos, taken by the Mars Global Surveyor, indicate that an enormous lake existed on Mars 3.5 billion years ago. The lake spilled into a large nearby hole. One edge of the hole broke, releasing a flash flood that quickly carved out a grand canyon.

    The existence of down-cutting on Mars is just one more piece of evidence that the cold, dry planet was once warm and wet.

    With five breakout(破纪录的) games, Jeremy Lin has become the NBA's newest star.

    In the New York Knicks' 92-85 won over the Los Angles Lakers last Saturday, Lin had a career-high 38 points. A day later, he led the Knicks to their fifth victory, 100-98 to Minnesota Timberwolves. In his previous games, Lin, 23, had 23 points against the Washington, 25 points against New Jersey and 28 against Utah in his first start.

    Lin is smart. Before graduating from high school in California, he had sent his application to all the Ivy League Schools(常青藤联盟). He only got into Harvard and Brown, and he chose Harvard. In 2010, Lin graduated with a degree in economics.

    Lin is the first Chinese-American player in the NBA. He was born in the US and his family is Asian. Although not born in China, Lin has attracted nearly all Yao Ming's old fans, who see him as a powerful role model.

    He started off on the Golden State Warriors. Lin first signed with the Warriors in July, 2010, but seldom played in games before the start of the fourth quarter. His first time on the court for the Warriors earned him seven points, three rebounds(篮板球) and two assists in just 11 minutes.

    He is really perfect for the Knicks. The New York Knicks has been in need of a reliable point guard and to Mike D'Antoni, the Knicks coach who's going through a difficult season, Lin is a most unexpected figure. Lin just does everything easy and the rest of the guys around him are playing the way we want to," D'Antoni said. "I think it's for real, and it can only get better."

    Hot spots of drones (无人机) in Australia are getting sensors to automatically identify the aircraft and their pilots. Australia's Civil Aviation Safety Authority (CASA) said it would fix the equipment at the nation's airports starting next month. The monitors have been planned for some time, but come in the wake of 72 hours of drone-related disorder at the UK's Gatwick airport last week.

    In 2019, Australia will also start a scheme to register drone owners. The UK is also due to introduce a scheme in November that will require recreational drones weighing 250g (0.55lb) or more to be registered.

    Almost 140,000 air travellers were delayed last week after reports of drone sightings caused huge delays at Gatwick Airport. UK police are still searching for the criminals, although they have also raised the possibility that witness reports of the aircraft were mistaken. The incident “highlights” the need for a drone-spotting capability (能力), CASA spokesman Peter Gibson told the news agency Agence France-Presse. The supervision system would be able to spot the types of drone being flown, read their serial numbers and work out where the pilot was located, he said. Efforts to identify pilots would be aided by the introduction of the registration scheme for commercial and casual drone owners, he added. “2019 will witness severe action towards drone safety,” said Mr. Gibson. As well as airports and other sensitive locations, the drone-spotting systems will be fixed in other places known to be popular with drone owners such as the Sydney Harbour Bridge.

    Authorities in Australia have expressed worries about the number of drones being flown in controlled areas in recent months. Anyone breaking rules could face fines of up to 10,000 Australian dollars ($7,058; £5,600) as well as checks on the safety of their craft. “In 2019 it could be very expensive doing the wrong thing with your drone,” said Mr. Gibson. Events at Gatwick were discussed by ministers in a Christmas Eve phone conference. It is understood that the Cabinet Office “pushed” the Ministry of Defence and the Home Office to update their relevant regulations. They also discussed defence systems across the UK's airports.

    We talk a lot in the U.S. about success. Success is the dream and the end point. And not by coincidence the idea that hard work leads to personal success is as American as apple pie.

    But the reality is that sometimes we fail. And sometimes things, through no fault of our own, don't go our way. We're faced with a life-changing diagnosis (诊断), the passing of a loved one or job loss. We don't, as a society, have as much to say here.

    I think uncertainty does us all harm. We'd feel better equipped to deal with uncertainty if we talked about it more. I had so fully bought into the belief that with enough effort, I could control what happened in my life. I actually caught myself thinking I could "work my way out" of my cancer. As it turns out, cancer doesn't really care about one's work.

    We might also make wiser decisions — this isn't just a feel-good exercise. For example, technology and medicine have progressed to the point that many patients are living longer than they would have even a decade ago. These are achievements worth celebrating. And yet I wonder if the focus on success is sometimes misguided here as well. If it is one reason why we tend to pursue expensive end-of-life treatments, they often accomplish little other than to make a patient's final days painful and frightening. The fact is that, when asked, many patients would rather focus on living meaningfully in their final days.

    My hope here is to make a case for thinking about meaning, in the same way we think about pursuing success. In that spirit, I've asked several people, each of whom has met misfortune, how they find meaning in their lives. The diversity in their responses reflects the fact that there are no right or wrong answers here. We each can find meaning in different things.

When it comes to recycling the household waste, people have done it for about two decades. However, there's still some confusion about what can and what can't be recycled. With advances in technology, there are more things that can be recycled.

COFFEE PODS (咖啡荚)

On average, Australians are using more than three million coffee pods per day, and about 1.5 million households have coffee machines. While the pods are disastrous for the environment, they can still be recycled. Nespresso has a free post-back programme and drop-off points run by TerraCycle, so you can take the pods and directly drop off at Nespresso stores.

LIGHT BULBS

Rather than throwing light bulbs into the bin, some councils run specific recycling stations, which allow you to drop off these kinds of items. If you do regularly recycle household glass, remember all glass should be washed and have lids removed.

PIZZA BOXES

Normally pizza boxes don't make it into recycling because they're covered in grease (油脂) and leftover bits of cheese. When a pizza box is too greasy, it won't be taken to a recycling processing plant. If possible, remove as much of the leftovers as you can before recycling. If the pizza box can't be recycled, tear off the lid which can still be recycled.

HOUSEHOLD BATTERIES

Household batteries can also be recycled. Batteries that do end up in landfills can cause a serious problem to the environment as they can release poisonous chemicals into the soil which are harmful to both humans and animals. Button-cell batteries, which are used in hearing aids and watches, can also be recycled.