A busy public square in the Chinese city of Nanjing is home to an unusual experiment.

    For almost two months, the country's first “honesty bookshop” has occupied（占据） a sidewalk on HanZhong Road in the city's Gulou District.

    With no cashier or other staff, the store relies on trust for payment.

    Making money isn't the company's main goal and they don't punish those who take books without paying.

    “If they can really finish the books, it doesn't matter if they took the books for free,” Zhu Yu, the marketing director of the company says.

    “In fact, we are really happy to witness so many people taking books from the honesty bookshop.” After browsing the four wooden bookshelves, customers must drop their money in a locked box.

    Prices are set at 30% of the usual cover price. Zhu hopes that his sidewalk store, which sells, on average, 60 books a day, will make more people interested in reading. Like elsewhere, e-books are affecting sales of traditional books, and traditional books and many independent booksellers are struggling.

    Zhu got permission from the city government to use the sidewalk and says he's determined to make it a long-term project.

    He says the store is open every day, except when it rains, and it's locked up each night.

    In September last year, the company laid out 1,000 books and reading lamps on the ground and encouraged people “to go on a date” with a book.

    “Independent bookshops represent the well-being of the city.” Zhu told CNN in 2013, “when a city is losing its bookshops, it's actually losing something in its soul.”

If the success of the Honesty Bookstore is any guide, Nanjing's soul is in pretty good shape.

Discovery's astronauts arrived to an exciting celebration Wednesday as nearly 700 people crowded an airplane storage place, waving flags and holding signs that read: “Welcome Home, Astronauts!”

    The seven-person team returned to Earth on Tuesday after being the first to take a space shuttle into orbit since the Columbia disaster（灾难）of 2003. 

    “In the last two and a half years, we have been through the very worst that manned space flight can bring us, and over the past two weeks we have seen the very best,” NASA Administrator Michael Griffin told the astronauts and their families and fans Wednesday. 

    The crowd waved American flags for the U.S. astronauts and Japanese flags for crew member Soichi Noguchi, one of the spacewalkers. 

    “As a rookie（新手）astronaut, I could not ask for more,” Noguchi said, “We had three spacewalks, two extra days in space and one great team.” 

    While the homecoming has been filled with excitement for what mission controllers declared a “truly spectacular test flight”, uncertainty remains for the future of the shuttle program. 

    Shortly after Discovery rose up into space July 26, a nearly 1-pound large piece of foam insulation（泡沫绝缘材料）fell from the fuel tank-the very thing that was supposed to have been fixed after Columbia exploded. The foam missed Discovery, but NASA grounded all shuttle flights until engineers fix the problem.

    NASA ground crews examined Discovery after its return from orbit and found it in good condition, an official said Wednesday at NASA‟s Dryden Flight Research Center at Edwards Air Force Base in California. 

    Technicians counted 101 dings and divots, including 20 that were larger than 1 inch. Schaaf Dean, landing support group chief, said the numbers were similar to the results of other shuttle, post-landing examinations. 

A beginning examination of the shuttle's thermal（热的）blanket showed it remained undamaged during re-en-try into the Earth's air.(Agencies)

    When my son was about five or six, I traveled a lot on business. I worried all the time about what the absence might mean to him. I knew how important it was for a boy to have his father near. When I was small, the times I loved most were the special moments I shared with my father. I cherished these special moments and, to this day, hold those memories dear. I decided to create those kinds of special times for my son.

    In one of my letters home, I promised my son that I would teach him how to fly a kite and that we could go to a nearby beach and fly it as high as it would go. Through my travels I would pick up things for our kite adventure and send them to him. In my trip to Japan, I found the most beautiful blue silk with gold threads（线）woven through it. Perfect kite materials! I sent it home with a picture book that would serve as a weight.

    When I got home at night, I found him sleeping sound, surrounded by all the items I had sent him for our kite. For the next week, we started to work on our masterpiece. We had our time together in the garage, after dinner. Finally, it was finished. The blue silk made it so beautiful. He was obviously eager to fly it soon. “We'll fly it tomorrow, right, Dad?” “Yes, if the weather is right,” I explained that we needed wind to lift the kite off the ground. I was afraid that it might rain. “We'll fly it because I'm going to pray with all my heart for the best kite weather.” He was right. I will never underestimate（低估）the power of a child's prayer any more.

    My son is a dad now, with children of his own. Though we are both busy, we still try to make time for each other. The other day, we met for coffee. While paying for our coffee, his wallet dropped on the ground and something fell out. Suddenly, a flood of memories washed over us as he put back his treasure into wallet—the blue silk with gold threads woven through it.

    How many times do you check your Facebook page in a day to see whether your latest post has got another “like” or “thumbs(拇指) up”?

    Although you might be embarrassed to admit how many times you do this, don't worry—psychological findings have shown it's completely normal. In fact, the pleasure we derive from receiving a “like” is equal to that of eating chocolate or winning money, and we can't help wanting more. According to the findings, which observed 32 teens aged between 13 and 18, the feedback circuit (反馈回路) in the teens' brains is particularly sensitive, and the “social” and “visual” parts of their brains were active when they received “likes” on the social network. The research also showed that though the thumbs up might come from complete strangers, the good they derive from them worked all the same.

    So, does it mean we should try our best to win as many thumbs up as possible? Not necessarily so if we know the reasons behind our desire for attention. In “why do people long for attention” by M. Farouk Radwan, he explained several cases in which people naturally longed for attention. Radwan said people who were an only child, who were used to being the center of attention in their house, may try to copy these conditions. Feeling “overlooked and unappreciated” might also lead you to long for attention. Other times, the state of being jealous, or wanting to cover your mistakes may also contribute to such longings.

    In fact, too much desire for attention can create anxiety, and in turn ruin your happiness even when you get it. So what can we do about it? The answer is quite simple. “If people could adopt goals not focused on their own self-esteem（自尊）but on something larger than their self, such as what they can create or contribute to others, they would be less sensitive to some of the negative effects of pursuing self-esteem,” wrote psychology professor Jennifer Crocker.

    So perhaps the answer to our addiction to “likes” is simply to focus on something larger than ourselves—a hard, but a worthy one.

    Robots are now being employed not just for dangerous tasks, such as discovering mines or rescuing people in disasters. They are also finding application as household helps and as nursing assistants. As increasing numbers of machines, equipped with the latest artificial intelligence, take on a growing variety of specialized and everyday tasks, the question of how people see them and behave towards them becomes ever more urgent.

    A team led by Sari Nijssen of Radboud University and Markus Paulus, Professor of Developmental Psychology at Ludwig-Maximilians-Universitaet (LMU), have carried out a study to determine the degree to which people show concern for robots and behave towards them based on moral principles.

    According to Sari Nijssen, the study set out to answer the following question:" Under what circumstances would adults be willing to sacrifice robots to save human lives?" The participants were faced with a hypothetical (假设的) moral dilemma: Would they be prepared to put a single person at risk in order to save a group of injured persons? In the situations presented the intended victim was either a human, a humanoid robot that had been humanized (人性化的) to various degrees or a robot that was clearly recognizable as a machine.

    The study suggested that the more the robot was humanized, the less likely participants were to sacrifice it. Situations that included vivid stories in which the robot was described as a merciful being or as a creature with its own understandings, experiences and thoughts, were more likely to stop the study participants from sacrificing it in the interests of anonymous (无名的) humans.

    "This result indicates that our study group attached a certain moral status to the robot," says Paulus. "One possible suggestion of this finding is that attempts to humanize robots should not go too far. Such efforts could come into conflict with their intended function—to be of help to us."

Lebanese filmmaker Nadine Labaki has become the first female artist in the Arab world to be nominated (提名)for an Academy Award, or Oscar.

Labaki directed the film Capernaum, a film about a Syrian refugee (难民) boy and a Kenyan baby who live without parents on the streets of Beirut. It was nominated for best foreign language film.

Labaki wil1 be one of the few female directors to compete for an Oscar this year. She told the Associated press "I wish there were a lot more women filmmakers this year represented, nominated in the Oscars. But I am sure in a few years we won't be having this problem anymore."

Unlike in the West, women filmmakers are industry leaders in Lebanon.

Capernaum received a 15-minute standing ovation (热烈欢迎) at this year's Cannes Film Festival. It won the Jury Prize—the third-highest award given at Cannes.

The United Nations has publicly praised the film. Lebanon's Foreign Minister said.

Capernaum put a Lebanese touch on the international film industry.

The Oscar nomination of Capernaum is the second for Lebanon in two years in the film group. It demonstrates the country's rising star power.

Labaki called making the movie a life-changing experience. She said Capernaum helps humanize the real struggles of refugees only briefly talked about in the news.

We can't help but acknowledge that there is a fear of refugees in general around the world and there are these walls we are building, and this fear that keeps growing," Labaki said.

Capernaum will compete against four other films for the Oscar, including awards season favorite Roma. Directed by Mexico's Alfonso Cuaron, it earned 10 Oscar nominations, including for best picture.