1 . Bullied (受欺凌的) kids face a high risk of mental health problems as teens and as young adults. Indeed, kids troubled by bullying may be worse off than those who had suffered physical abuse (虐待) or neglect, as the study found.

Until recently, most studies of child victims focused not on bullying but on maltreatment (虐待), Dieter Wolke says. Maltreatment includes physical or emotional abuse, neglect or other behaviors that can harm a child.

Wolke’s team wanted to better understand bullying’s long-term effects compared to those due to maltreatment. They focused on 4,026 children in the United Kingdom and 1,420 more in the United States. Information about bullying and maltreatment was collected for American children to age 13. They collected the same information for British youth up to age 16. The researchers also gathered data on each individuals’ mental health as a young adult.

Among the Americans, 36 percent of bullied kids had mental problems later. Those problems included anxiety, which is a state of excessive worry. They also included depression. That is a feeling of hopelessness that can last a long time. Among kids who had been maltreated by adults, 17 percent later suffered mental health problems. That was less than half the rate seen in people had been bullied as school kids.

In the U.K. group, the difference was less dramatic. Roughly 25 percent of the bullied kids reported mental health problems later, compared with about 17 percent who had been maltreated. But however you look at it, the findings are disturbing. And that’s why Wolke says schools, health services and other agencies must work together to end bullying.

Studies like this are important, says Corinna Jenkins Tucker. They bring attention to the lasting impacts of bullying. Tucker does, however, question the value of comparing bullying to other types of abuse. Such an approach can make it seem like one type of bad experience is worse than the other, she says. In fact, both types have short-term and long-term effects on health. She’d like to see researchers study the big picture. They should try to understand how all of these negative experiences together shape children—and sometimes harm them.

2 . You may think that sailing is a difficult sport, but it is really not hard to learn it. You do not need to be strong. But you need to be quick. And you need to understand a few basic rules about the wind.

First, you must ask yourself, “Where is the wind coming from? Is it coming from ahead or behind or from the side?” You must think about this all the time on the boat. The wind direction tells you what to do with the sail.

Let’s start with the wind blowing from behind. This means the wind and the boat are going in the same direction. Then you must always keep the sail outside the boat. It should be at a 90° angle to the boat. Then it will catch the wind best.

If the wind is blowing from the side, it is blowing across the boat. In this case, you must keep the sail half way outside the boat. It should be at a 45°angle to the boat. It needs to be out far enough to catch the wind, but it shouldn’t flap (摆动). It shouldn’t look like a flag on a flagpole. If it is flapping, it is probably out too far, and the boat will slow down.

Sailing against the wind is not possible. If you try, the sail will flap and the boat will stop. You may want to go in that direction. It is possible, but you can’t go in a straight line. You must go first in one direction and then in another. This is called tacking (抢风行驶). When you are tacking, you must always keep the sail inside the boat.

5 . In the animal kingdom, mimics (模仿) are not rare. Stick insects pretend to be twigs. Hawk moth caterpillars resemble poisonous snakes. The examples, though, are visual. Auditory mimicry is rarer. Danilo Russo of the University of Naples Federico II thinks he has found a novel case of it, as he describes in Current Biology. Some bats, he believes, mimic angry bees in order to scare away owls that might otherwise eat them.

Dr. Russo first noticed bat buzzing a few years ago. The noise struck him as similar to the sound of some bees. He wondered whether bat buzzing was a form of mimicry which helped to frighten away would-be predators.

To test this idea, he and his colleagues first recorded the buzzing that captured bats made. Then, with protective clothing, they began the more dangerous task of recording the buzzing made by different bees. Computer analysis revealed that bees’ and bats’ buzzing were, indeed, similar.

Then the researchers recruited several owls. They put the owls, one at a time, in an enclosure with branches for them to stay on, and two boxes with holes in them. They placed a loudspeaker alongside one of the boxes, and after the birds had settled in, broadcast through it five seconds of uninterrupted bat buzzing and a similar amount of insect buzzing three times in a row for each noise. As a control, they broadcast in like manner several non-buzzing sounds made by bats.

During the broadcasts and for five minutes thereafter, they videoed the owls. After analysis, the results were unequivocal. When they heard both the bat buzzing and the bee buzzing, the owls moved as far from the speakers as they could. In contrast, when the non-buzzing bat sounds were played, they crept closer.

Dr. Russo believes this is the first reported case of a mammal using auditory mimicry to scare away a predator. They strongly suspect, however, that it is not unique. Anecdotes suggest several birds also make buzzing noises when their nests are disturbed. And with the result of the experiment, he therefore predicts that auditory mimicry is far more widespread than currently realized.

8 . Few women would consider a pair of scissors to be daily essential that they need to have in their purses. But for Shi Qinling, who is currently working at the Fenglin community cultural center in Shanghai, this tool has been with her everywhere she goes for the past decade —not as a means of self-protection but artistic expression.

“Paper-cutting is not about cutting random patterns from paper. Writers tell stories using words. I do the same, but with a pair of scissors,”Shi said.

Shi developed an interest in craft (工艺) when she was a child. This interest later developed into a passion, one that she decided to pursue by majoring in arts and crafts design during her time in university. After graduation, however, she found herself working at a ship design company as she was unsure about what she wanted to do with her future. About a year later, the Shanghai Arts and Crafts Research Institute offered her a position in their paper-cutting department. Realizing that she still had a love for the craft, she made the career switch.

In 2010, Shi started learning paper-cutting from Xi Xiaoqin, a paper-cutting expert. Three years later, one of her works, The Fighting Fish, won third place at the

Baihua Cup, a competition for Chinese arts and crafts. Over the past decade, Shi’s works have been exhibited in 23 exhibitions.

Although Shi is already so skilled in the craft that she can create an animal pattern in 10 minutes without even having to draw the outlines, she continues to improve her skills every day. The reason is that she views paper-cutting as not just an art form, but also a form of learning about traditional Chinese culture. She thinks she has the responsibility to attract people from different age groups and different fields to try paper-cutting.