WHAT can help you make a fortune in the future? Graduating from a top university might not be enough. A new study from the University of Essex in Britain has shown that the more friends you have in school, the more money you'll earn later.

    The idea that popularity could have a serious influence on one's earning potential shouldn't come as too much of a surprise. The researchers noted that if you want to get ahead in life, social skills and networking are easily as powerful as talent and hard work.

    “If a person has lots of friends, it means that he or she has the ability to get along with others in all kinds of different situations,” said Xu Yanchun, 17, from Nantou High School in Shenzhen, who totally agreed with the recent finding. “Also, friends always help each other. They not only create wider social circles for you but lift your mood when you are occasionally in low spirits,” said Xu. She believed that all this helps you “earn a higher salary.”

    Maybe that's why some people think the younger generations are in the age of Friendalholism (交友狂症). A woman even complained that the networking website Facebook's 5,000-friend limit was too low for her large reserve of social contacts.

    But what does a friend mean? Should friends be regarded as a form of currency?

    “Call me uncool, but I think of a friend as an actual person with whom I have an actual history and whom I enjoy actually seeing. It seems, however, that this is no longer the definition of friend”, said Meghan Daum, who works with The Los Angeles Times in the US.

    Daum dislikes the idea that quantity trumps quality in the age of Friendaholism. She thought the idea of friendship, at least among the growing population of Internet social networkers, was to get as many of not-really-friends as possible. For example, a friend might be someone you might know personally but who could just as easily be the friend of a friend of some other Facebook friend you don't actually know. Although she agreed that social ties grease (润滑) the wheels of life, she also warned. “Too bad one thing money can't buy is a real friend.”

    Beauty has always been regarded as something praiseworthy. Almost everyone thinks attractive people are happier and healthier, have better marriages and have more respectable jobs. Personal advisors give them better advice for finding jobs. Even judges are softer on attractive defendants. But in the executive(主管) circle, beauty can become a liability.

    While attractiveness is a positive factor for a man on his way up the executive ladder, it is harmful to a woman.

    Handsome male executives were considered as having more honesty than plainer men; effort and ability were thought to lead to their success.

    Attractive female executives were considered to have less honesty than unattractive ones; their success was connected not with ability but with factors such as luck.

    All unattractive women executives were thought to have more honesty and to be more capable than the attractive female executives. Interestingly, though, the rise of the unattractive overnight success was connected more to personal relationships and less to ability than that of the attractive overnight success.

    Why are attractive women not thought to be able? An attractive woman is considered to be more feminine and an attractive man more manly than the less attractive ones. Thus, an attractive woman has an advantage in traditionally female jobs, but an attractive woman in a traditionally manly position appears to lack the "manly" qualities required.

    This is true even in politics. "When the only clue is how he or she looks, people treat men and women differently," says Anne Bowman, who recently published a study on the effects of attractiveness on political candidates. She asked 125 undergraduate students to rank two groups of photographs, one of men and one of women, in order of attractiveness. Then the students were told the photographs were of candidates for political offices. They were asked to rank them again, in the order they would vote for them.

    The results showed that attractive males completely defeated unattractive men, but the women who had ranked most attractive unchangeably received the fewest votes.

    By now, you've probably been warned that a robot is coming for your job. But rather than repeat the warning, I've decided to throw down a challenge: man against machine.

    Start with the task we're doing right now: communicating in fluent human. We're sharing abstract ideas through words that we choose with an understanding of their slight difference and impact. We don't just speak in human; we speak as humans. A robot who says that science is fun is delivering a line (念一句话). A human who says that science is fun is telling you something important about being alive.

    Here's another inbuilt advantage we take for granted: as humans we are limited by design. We are bound in time: we die. We are bound in space: we can't be in more than one place at a time. That means when I speak to an audience, I am giving them something special. It's a custom-made, one-off, 100% robot-free delivery, from today's one-and-only Australian Chief Scientist.

    True, I now come in digital versions, through Twitter and Facebook and other platforms, but the availability of those tools hasn't stopped people from inviting me to speak in person. Digital Alan seems to increase the appetite for human Alan, just as Spotify (a digital music service) can increase the demand for a musician's live performances.

    Thanks to technology, many goods and services are cheaper, better and more accessible than ever before. We like our mass-produced bread, and our on-tap lectures and our automated FitBit advice. But automation hasn't killed the artisan bakery (面包店). Online courses haven't killed the booming, alongside their machine equivalents.

    Here's a third argument for the win. We humans have learned the habit of civilization. Let me explain this point by a story. A few years go, some researchers set out to study the way the people interact with robots. They sent out a small robot to patrol (巡逻) the local mall. That robot had a terrible time, and the villains of the story were children. They kicked him, bullied him, and smacked (掌击) him in the head.

    The point is not that the children were violent. The point is that the adults were not. They restrained whatever primitive impulse (冲动) they might have felt in childhood to smack something smaller and weaker in the head, because they had absorbed the habit of living together. We call it civilization. If we want artificial intelligence for the people, we'll need every bit of that civilizing instinct.

    Together, these points suggest to me that humanity has a powerful competitive edge. We can coexist with our increasingly capable machines and we can make space for the full breadth of human talents to flourish.

    It was only a dollar. Belscher noticed it on the floor as he sat at the back of his English class. When the school day ended, Belscher wandered back to the classroom. The old bill was still there. He could easily have pocketed it without thinking twice. Instead, he picked it up and brought it to his English teacher, Mattison.

    "It wasn't my money," Belscher says. Mattison was a little surprised he'd turned the dollar in, knowing a lot of people would have just kept it. She suggested that Belscher tape(贴) it to the whiteboard at the front of the classroom, where she always puts lost things.

    Rose, another student, was in English class after break when he spotted the dollar on the whiteboard. After class, he asked Mattison why it was there. She was still waiting for the original owner to claim it, so she replied, "I don't know." Rose took the tape from Mattison's desk and taped a second dollar to the board.

    That got it rolling. The sight of the two dollar bills, side by side, started something in Mattison's students. They started asking about the purpose of the money, to which Mattison always gave the same answer: She didn't know. At that point, it was true.

    More students, curious, taped up single dollar bills. Mattison started to leave the tape on the tray of the whiteboard. The effort snowballed. Even with no clear purpose, many students wanted to be part of whatever this was. The amount continued to grow over several weeks, until it reached $175.76.

    That left Mattison to make the best decision. She kept thinking about her brother-in-law, Jack Hains. Eight years earlier, Jack had died of amyotrophic lateral sclerosis (ALS), a rare and devastating neurological disease(神经疾病).

    Mattison explained to her classes that Jack had raised money every spring for the ALS Therapy Development Institute, established to seek a cure for the disease. She asked the teens whether they minded if she donated the dollars in their names in honor of Jack.

    Their answer was to tape enough money to the whiteboard over the next few days to push the amount to $321.06. Mattison, choking back tears as she recalls the moment, says she carefully picked the cash off the board and made the donation just before the beginning of May, which is National ALS Awareness Month. That was Saturday. By Monday afternoon, eight more dollars had been taped to the board.

Even though they're not the most exciting things in the world, plants have fascinated us ever since the days of early humans. They may not do any tricks or greet us when we come home at night like a dog would, but that doesn't mean they're any less interesting than animals.

However, just when we thought we knew everything we could about them, a recent study found that plants may possess a secret ability that's gone unnoticed all this time. According to the study by Australian biologist Monica Gagliano, published in the journal Oecologia, plants may be able to hear sounds.

To come to this conclusion, Gagliano and her team planted pea seedlings in a pair of different Y-shaped pots with two arms. The first pot's arms led to fresh water, while the other's led to either dry soil or a sealed plastic tube containing flowing water.

Naturally, the first pot's seedlings grew toward the water. What's surprising, however, is that the second pot's seedlings grew toward the sealed water supply and not the soil.

They just knew the water was there, even if the only thing to detect was the sound of it flowing inside the pipe, Gagliano told Scientific American. Gagliano believes that plants are able to use their leaves to detect sound waves, which make tiny vibrations (振动) as they're produced.

This could explain why so many people believe that singing or playing music to their plants helps them grow.

I had a plant that I used to wash the leaves once a week and sing to it, plant lover Heather Goodall told BBC News. It grew from being about 2 feet tall to 7 feet tall in just a couple of years.

So, does this mean we should start treating our plants like pets? Not necessarily, although perhaps it does mean we should give them more respect. I would like to see plants acknowledged more as the amazing, interesting, exotic living beings they are, and less as a mere source of human nutrition, Fatima Cvrckova, a scientist at Charles University in the Czech Republic, told BBC News.

Tunnels are passageways that are built under the ground. They can also be made under a sea or a river. Some tunnels are dug through high mountains.

For hundreds of years, tunnels have been built all over the world. People use these tunnels to travel from one place to another. Some tunnels are used as waterlanes. Coal and gemstones are also brought from under the ground through long tunnels.

In the past, people dug tunnels using picks and shovels. Rocks and soil were loaded into one-wheel barrows and then onto horses and carts. This work was very tiring.

Today, engineers do a lot of planning before they start to build a tunnel. They use computers to check the level of the water and the types of rock under the ground. When they are sure the area is safe, huge machines are used to dig out the soil.

These machines have an enormous cutting wheel at the front. The wheel slowly grinds (磨碎) through the rock and soil to make the tunnel. Soil that is not needed is carried away in large trucks. As the tunnel becomes longer, it is lined with huge pipes so the walls and roof do not callapse.

Long tunnels have powerful lights to help drivers see the road ahead. Water sprinklers (洒水装置) are fitted to help keep people safe if a fire breaks out in the tunnel.

In large cities, tunnels are built under very busy roads. , People can drive through these tunnels. This makes it quicker to travel to different parts of the city.

Some trains have to wind slowly and carefully over steep mountain slopes. But, in places where there are tunnels, trains can travel quickly through the mountain to reach the other side.