Recently, professor of philosophy (哲学)in the United States has written a book called Money and the Meaning of Life. He has discovered that how we deal with money in our daily life has more meaning than we usually think. One of the exercises he asked his students to do is to keep a record of every penny they spend for a week. From the way they spend their money, they can see what they really value in life.

    He says our relations with others often become dearly defined (清晰的）when money enters the picture. You might have wonderful relationship with somebody and you think that you are very good friends. But you will know him only when you ask him to lend some money. If he does, it brings something to the relationship that seems stronger than ever before or it can suddenly weaken the relationship if he doesn't. This person may say that he has a certain feeling, but if it is not carried out in the money world, there is something less real about it.

    Since money is so important to us, we consider those who possess a lot of it to be very important. The author interviewed some millionaires in researching his book.

    Question: What is the most surprising thing you have discovered about being rich, because you are a self-made man?

    Answer: The most surprising thing is how people give me so much respect. I am nothing. I don't know much. All I am is rich.

    People just have an idea of making more and more money, but what is it for? How much do I need for any given purposes in my life? In his book, the professor uncovered an important need in modem society: to bring back the idea that money is an instrument rather than the end. Money plays an important role in the material world, but expecting money to give happiness may be missing the meaning of life.

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    I arrived late one night on a business trip, so I decided to have dinner in the hotel I stayed in. As I was finishing my meal, an elderly couple came in. They were holding hands and had lovely smiles on their faces. They sat three tables from me. I was amazed at the love they showed for each other. It struck me because it was shortly after ending a 20-year marriage and I still had pain in my heart.

    My waiter was also their waiter. As I paid my bill, I asked what their bill was. He told me, and I gave him $40 to pay their bill. He asked if I knew them and I told him “No, I just wanted to repay them for the love that they were showing to each other,” and then I left. The next day I entered the restaurant again. After I had been seated, the waiter who served me the night before told me that the strangest thing happened after I left the restaurant. When the elderly couple went to pay for their meal, they were told that it had been paid. The waiter just told them what I said. They were amazed. They looked around, asked for the bill of two young couples who were seated together, paid their bill and left.

    I smiled and ordered my meal. About 45 minutes later, I finished my meal and was about to head out, but my waiter was nowhere to be found. I explained to the hostess that I needed to pay for my meal and hurry to the airport. She smiled and explained that I would not have to pay, because she felt she should pay for my bill because of the joy brought to the faces of the elderly couple and the amazement of the young couples.

    When I told her that they didn't have to do that, she said with a smile “Love creates Love.”

    If you make a list of the world's top ten most challenging jobs,chances are that being a teacher will not make the cut.But think about the discouraging task millions of educators face each day as they try to shape a group of often bad-tempered,wild kids into intelligent,well-rounder individuals.That surely has to be the toughest job in the world, especially given that there is no promotion or bonus awaiting them even if they are wildly successful!

    What if there all-important individuals that we often take for granted（想当然）disappear from our lives?That was what Project Ed and Participant Media's Teach campaign asked filmmakers of all ages to imagine in their recently-held competition.Entitled "A World Without Teachers",its purpose was to inspire more young people to become teachers.However,the 62 amazing video submissions also serve as a reminder of how horrible things would be if we didn't have these selfless individuals guiding us through life.What was interesting is that even the youngest participants did not appear to be happy at the idea of not having anybody telling them what to do.

    High-school student Savannah Wakefield reflected if art as we know it today would have been different without teachers.Would Monet have discovered his talent for impressionism?Los Angeles-based Miles Horst,who won the 1000 USD prize for the best adult submission imagines a world where teachers are replaced by a “brain box” in his fun lively entry.

    Youth category winner Marina Barham's video represents a fact we all know but often forget.Teachers don't just teach,they inspire something that no electronic device,no matter how smart,can do!So the next time you think your teacher is being "mean" for trying to channel you in the right direction,imagine a life without him/her.We have a feeling it will not appear as rosy!

    How could we possibly think that keeping animals in cages in unnatural environments, mostly for entertainment purposes, is fair and respectful?

    Zoo officials say they are concerned about animals. However, most zoos remain “collections” of interesting “things” rather than protective habitats. Zoos teach people that it is acceptable to keep animals bored, lonely, and far from their natural homes.

    Zoos claim to educate people and save endangered species, but visitors leave zoos without having learned anything meaningful about the animals' natural behavior, intelligence, or beauty. Zoos keep animals in small spaces or cages, and most signs only mention the species' name, diet, and natural range. The animals' normal behavior is seldom noticed because zoos don't usually take care of the animals' natural needs.

    The animals are kept together in small spaces, with no privacy and little opportunity for mental and physical exercise. This results in unusually and self-destructive behavior called zoo-chosis(圈禁性精神病). A worldwide study of zoos found that zoochosis is common among animals kept in small spaces or cages. Another study showed that elephants spend 22 percent of their time making repeated head movements or biting cage bars, and bears spend 30 percent of their time walking back and forth, a sign of unhappiness and pain.

    Furthermore, most animals in zoos are not endangered. Captive breeding(圈养繁殖) of endangered big cats, Asian elephants, and other species has not resulted in their being sent back to the wild. Zoos talk a lot about their captive breeding programs because they do not want people to worry about a species dying out. In fact, baby animals also attract a lot of paying customers. Haven't we seen enough competitions to name baby animals?

    Actually, we will save endangered species only if we save their habitats and put an end to the reasons people kill them. Instead of supporting zoos, we should support groups that work to protect animals' natural habitats.

    MOOC, a massive(大规模的) open online course, aims at providing interactive discussion and open access via the web. In addition to traditional course materials such as videos, readings, and problem sets, MOOCs provide interactive user forums (论坛) that help build a community for the students, professors, and teaching assistants.

    MOOCs first made waves in the fall of 2011, when Professor Sebastian Thrun from Stanford University opened his graduate-level artificial intelligence course up to any student anywhere, and 160,000 students in more than 190 countries signed up. This new kind of online classes is shaking up the higher education world in many ways. Since the courses can be taken by hundreds of thousands of students at the same time, the number of universities might decrease greatly. Professor Thrun has even imagined a future in which there will only need to be 10 universities in the world. Perhaps the most impressive thing about MOOCs, many of which are being taught by professors at prestigious (声誉高的) universities, is that they're free. This is certainly good news for cash-strapped students.

    There is a lot of excitement and fear about MOOCs. While some say free online courses are a great way to increase the enrollment (注册) of students who are lack of resources, some critics (批评者) have said that MOOCs encourage an unrealistic one-size-fits-all model of higher education and that there is no replacement for true dialogues between professors and their students. After all, a brain is not a computer. We are not blank hard drives waiting to be filled with data. People learn from people they love and remember the things that arouse emotion. Some critics worry that online students will miss out on the social aspects of college.

    The Ig Nobel Prizes praise research that makes you laugh and then think. The winners are allowed to make a one-minute speech with time kept by an eight-year-old! Every year, in Harvard's Sanders Theatre, people watch the winners step forward to accept their prizes. These are physically handed out by real Nobel laureates (获得者). Let's have a look at some of them.

    The Empty Bladder (膀胱) Experiment

    Four researchers at Georgia Institute of Technology found that animals above 3 kg empty their bladders in about 21 seconds. What is the purpose of this study? The researchers hope this will help solve urinary (泌尿的) problems in animals.

    The Science of Eggs

    A team of Australian scientists managed to get hard-boiled egg whites to become raw again. While it sounds silly, this research could have a serious influence on cancer (癌症) research.

    The Fascination with Animals

    Charles Foster and Thomas Thwaites from the UK shared the 2016 Ig Nobel Prize in Biology. Thomas chose to live like a goat and wrote about his experience in "GoatMan: How I Took a Holiday from Being Human". Charles, on the other hand, spent some time in the wild, trying out the lives of many animals. He felt it gave him a chance to explore the world around us with more of our senses.

    Colors & Horseflies

    A team from Hungary, Spain, Sweden and Switzerland won the 2016 Ig Nobel Prize in Physics. They studied why horseflies have less interest in white-haired horses. The team used handmade horses covered in glue. They found that dark colors attracted more flies because of how sunlight reflected (反射) off them. To the food searchers, it was a sign of food. This finding could explain the white coats of zebras too.