Americans always attach great weight to the business of the country. President Coolidge's statement, “the business of America is business.” Still points to an important truth today—that business institutions have more prestige(威望) in American society than any other kind of organization, including the government. Why do business institutions possess this great prestige?

    One reason is that Americans view business as being more firmly based on the ideal of competition than other institutions in society. Since competition is seen as the major source of progress and prosperity by most Americans, competitive business institutions are respected. Competition is not only good in itself, it is the means by which other basic American values such as individual freedom, equality of opportunity, and hard work are protected.

    Competition protects the freedom of the individual by ensuring that there is no monopoly (垄断、垄断者) of power. In contrast to one, all-powerful government, many businesses compete against each other for profits. Theoretically, if one business tries to take unfair advantage of its customers, it will lose to competing business which treats its customers more fairly. Where many businesses compete for the customers' dollar, they cannot afford to treat them like inferiors(下属) or slaves.

    A contrast is often made between business, which is competitive, and government, which is a monopoly. Because is competitive, many Americans believe that it is more supportive of freedom than government, even though government leaders are elected by the people and business leaders are not. Many Americans believes, then, that competition is as important, or even more important, than democracy in preserving freedom.

    Competition in business is also believed to strengthen the ideal of equality of opportunity. Competition is seen as an open and fair where success goes to the swiftest person regardless of his or her social class background. Competitive success is commonly seen as the American alternation to social rank based on family background. Business is therefore world as an expression of the idea of equality of opportunity in America rather than the aristocratic(贵族的) idea of inherited privilege in many other countries

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    The ninth week of SEAL(Sea, Air, Land) training is referred to as Hell Week. It is six days of no sleep, physical and mental suffering and one special day at the Mud Flats (泥沼）where you will sink into the mud.

    It is on Wednesday of Hell Week that we came down to the mud flats and spend the next 15 hours trying to survive the freezing-cold mud, the cold wind and the strong pressure from the instructors to give up.

    As the sun began to set that Wednesday evening, my training class, having broken some of the rules, was ordered into the mud. We sank into the mud until only our heads could be seen. The instructors told us we could leave the mud if only five men would give up—just five men and we could get out of the cold.

    Looking around the mud flat, it was clear that some of us were about to give up. It was still over eight hours till the sun came up--eight more hours of coldness. Our cries were so loud that it was hard to hear anything. And then, one voice began to fly through the night--one voice raised in song.

    The song sounded terrible, but it was sung with great power. One voice became two, and two became three, and before long everyone in the class was singing.

    We knew that if one man could rise above the suffering then others could as well. The instructors warned us of more time in the mud if we kept up the singing—but the singing went on and on. And somehow, the mud seemed a little warmer, the wind a little weaker and the morning not so far away.

    If I have learned anything in my time traveling the world, it is the power of hope. The power can change the world by giving people hope.

    So, if you want to change the world, start singing when you're up to your neck in mud.

    Let's face it. No one drinks diet sodas for the taste. People drink diet sodas in the hope that it will help them lose weight or at least keep them from gaining it. Yet it seems to have exactly the opposite effect, according to a new study.

    Researchers from the University of Texas said those who drank two or more diet sodas a day had waist size increases that were six times greater than those who didn't drink diet sodas. ＂What we saw was that the more diet sodas a person drank, the more weight they were likely to gain,＂ said Sharon Fowler.

The study was based on data from 474 participants in a large, ongoing research project, where the participants were followed for nearly 10 years.

    While the findings are surprising, they also offer some explanations.

    Nutrition expert, Melanie Rogers, who works with overweight patients in New York, has found that when patients are switched from regular to diet sodas, they don't lose weight at all. ＂We weren't seeing weight loss necessarily, and that was confusing to us,＂ said Rogers.

    So why would diet soda cause weight gain? No one knows for sure yet, but it could be that people think they can eat more if they drink diet sodas, and so over-compensate for the missing calories.

    A related study found some sweeteners (甜味剂) raised blood sugar levels in some mice. ＂Data from this and other potential studies suggest that the promotion of diet sodas and artificial sweeteners may be risky,＂ said Helen P. Hazuda, professor at the University of Texas's school of medicine. ＂They may be free of calories, but not of consequences.＂

    Parallel worlds exist and interact with our world, say physicists.

    Quantum mechanics (量子力学), though firmly tested, is so weird and anti-intuitive that physicist Richard Feynman once remarked, “I think I can safely say nobody understands quantum mechanics.” Attempts to explain some of the bizarre (奇异的) consequences of quantum theory have led to some mind-bending ideas, such as the Copenhagen interpretation and the many-worlds interpretation.

    Now there's a new theory on the block, called the “many interacting worlds” hypothesis (假设) (MIW), and the idea is just as profound as it sounds. The theory suggests not only parallel worlds exist, but that they interact with our world on the quantum level and are thus detectable. Though still speculative (推测的), the theory may help to finally explain some of the bizarre consequences inherent in quantum mechanics.

    The theory is a spinoff of the many-worlds interpretation in quantum mechanics—an assumption that all possible alternative histories and futures are real, each representing an actual, though parallel, world. One problem with the many-worlds interpretation, however, has been that it is fundamentally untestable, since observations can only be made in our world. Happenings in these proposed “parallel” worlds can thus only be imagined.

    MIW, however, says otherwise. It suggests that parallel worlds can interact on the quantum level, and in fact that they do.

    “The idea of parallel universes in quantum mechanics has been around since 1957,” explained Howard Wiseman, a physicist at Griffith University in Brisbane, Australia, and one of the physicists to come up with MIW. “In the well-known 'Many-Worlds Interpretation', each universe branches into a bunch of new universes every time a quantum measurement is made. All possibilities are therefore realized — in some universes the dinosaur-killing asteroid (小行星) missed Earth. In others, Australia was colonized by the Portuguese.”

    “But critics question the reality of these other universes, since they do not influence our universe at all,” he added. “On this score, our 'Many Interacting Worlds' approach is completely different, as its name implies.”

    Wiseman and colleagues have proposed that there exists “a universal force of repulsion between 'nearby'(i.e. similar) worlds, which tends to make them more dissimilar.” Quantum effects can be explained by factoring in this force, they propose.

    When asked about whether their theory might imply that humans could someday interact with other worlds, Wiseman said: “It's not part of our theory. But the idea of human interactions with other universes is no longer pure fantasy.”

    What might your life look like if you made different choices? Maybe one day you'll be able to look into one of these alternative worlds and find out.

    Alison Malmon was ending her freshman year at the University of Pennsylvania. US, when she got the news: Her older brother Brian, a student at Columbia University; was suffering from mental illness.

    Inspired by this, Malmon formed a group at her university to organize students to talk openly about mental health. It soon blossomed into a national organization that today has more than 450 campus chapters. Leaders with the organization spend their time talking with college students about the pressure that today's young people face.

    "What you hear often is just a need to be perfect," said Malmon, "and a need to present oneself as perfect." A new study in the UK proved that this need for perfectionism is simply part of today's society. In the study, two researchers studied more than 40,000 students from the US, Canada, and the UK. They found that what they called "socially-prescribed (社会定向型的) perfectionism" increased by a third between 1989 and 2016.

    Lead researcher Thomas Curran said that while so many of today's young people try to present a perfect appearance online, social media isn't the only reason behind this trend. Instead, he said, it may be driven by competition in modem society, meaning young people can't avoid being sorted and ranked in both education and employment. That comes from new normal situation like greater numbers of college students, national examination and parenting that increasingly emphasizes success in education.

    For example, in 1976, half of high school seniors expected to get a college degree of some kind. By 2008, more than 80 percent expected the same. The researchers also said changes in parenting styles over the last two decades might have had an impact. As parents feel increased pressure to raise successful children, they in turn pass their "achievement anxieties" onto their kids through "too much participation in their child's activities or emotions

    Those in the mental health community like Malmon say they're concerned about the impact the culture of perfectionism has on mental health on campuses. "Mental health has truly become this generation's social justice (公正)issue," she said. "It's our job to equip them with the tools and to let people know that it's not their fault."

At my first lesson in Chinese calligraphy, my teacher told me plainly: "Now I will teach you how to write your name. And to make it beautiful." I felt my breath catch. I was curious.

Growing up in Singapore, I had an unusual relationship with my Chinese name. My parents are ethnically Chinese, so they asked fortune tellers to decide my name, aiming for maximum luck. As a result, I ended up with a nonsense and embarrassing name: Chen Yiwen, meaning, roughly, "old", "barley （薏米） "and "warm".

When I arrived in America for college at 18, I put on an American accent and abandoned my Chinese name. When I moved to Hong Kong in 2021, after 14 years in the States, I decided to learn calligraphy. Why not get back in touch with my heritage? I thought.

In calligraphy, the idea is to copy the old masters' techniques, thereby refining your own. Every week, though, my teacher would give uncomfortably on-the-nose assessments of my person. "You need to be braver," he once observed. "Have confidence. Try to produce a bold stroke （笔画）." For years, I had prided myself on presenting an image of confidence, but my writing betrayed me.

I was trying to make sense of this practice. You must visualize the word as it is to be written and leave a trace of yourself in it. As a bodily practice, calligraphy could go beyond its own cultural restrictions. Could it help me go beyond mine? My teacher once said to me, "When you look at the word, you see the body. Though a word on the page is two-dimensional, it contains multitudes, conveying the force you've applied, the energy of your grip, the arch of your spine." I had been learning calligraphy to get in touch with my cultural roots, but what I was really seeking was a return to myself. Now I have sensed that the pleasure out of calligraphy allows me to know myself more fully.

During a recent lesson, my teacher pointed at the word I had just finished, telling me: "This word is much better. I can see the choices you made, your calculations, your flow. Trust yourself. This word is yours." He might as well have said, "This word is you."