By trying to tickle(挠痒痒) rats and recording how their nerve cells respond, Shimpei Ishiyama and his adviser are discovering a mystery that has puzzled thinkers since Aristotle expected that humans, given their thin skin and unique ability to laugh, were the only ticklish animals.

    It turns out that Aristotle was wrong. In their study published on Thursday, Ishiyama and his adviser Michael Brecht found that rats squeaked and jumped with pleasure when tickled on their backs and bellies. These signs of joy changed according to their moods. And for the first time, they discovered a special group of nerve cells. These nerve cells made this feeling so powerful that it causes an individual being tickled to lose control.

    To make sure that he had indeed found a place in the brain where tickling was processed, Ishiyama then stimulated that area with electrical currents. The rats began to jump like rabbits and sing like birds.

    “It's truly ground-breaking,” said Jeffrey Burgdorf, a neuroscientist at Northwestern University who reviewed the paper. “It takes the study of emotion to a new level.”

    Burgdorf has played a central role in our understanding of animal tickling. He was part of a team that first noticed, in the late 1990s, that rats made special noises when they were experiencing social pleasure. Others had already noted that rats repeatedly made short and high sounds during meals. But the lab where Burgdorf worked noticed that they emitted similar sounds while playing. And so one day, the senior scientist in the lab said, “Let's go and tickle some rats.” They quickly found that those cries of pleasure doubled.

    “The authors have been very adventurous,” said Daniel O'Connor, a neuroscientist at Johns Hopkins University who studies touch. To him, that finding was very surprising.

    “Why does the world literally feel different when you are stressed out?” he said. “This is the first step towards answering that question. It gives us a way to approach it with experimental rigor(严谨).”

    Terrafugia Inc. said Monday that its new flying car has completed its first flight, bringing the company closer to its goal of selling the flying car within the next year. The vehicle —named the Transition – has two seats, four wheels and wings that fold up so it can be driven like a car. The Transition, which flew at 1,400 feet for eight minutes last month, can reach around 70 miles per hour on the road and 115 in the air. It flies using a 23-gallon tank of gas and burns 5 gallons per hour in the air. On the ground, it gets 35 miles per gallon.

    Around 100 people have already put down a $10,000 deposit to get a Transition when they go on sale, and those numbers will likely rise after Terrafugia introduces the Transition to the public later this week at the New York Auto Show. But don't expect it to show up in too many driveways. It's expected to cost $279,000.And it won't help if you're stuck in traffic. The car needs a runway.

    Inventors have been trying to make flying cars since the 1930s, according to Robert Mann, an airline industry expert. But Mann thinks Terrafugia has come closer than anyone to making the flying car a reality. The government has already permitted the company to use special materials to make it easier for the vehicle to fly. The Transition is now going through crash tests to make sure it meets federal safety standards.

    Mann said Terrafugia was helped by the Federal Aviation Administration's decision five years ago to create a separate set of standards for light sport aircraft, which are lower than those for pilots of larger planes. Terrafugia says an owner would need to pass a test and complete 20 hours of flying time to be able to fly the Transition, a requirement pilots would find relatively easy to meet.

    Imagine on your way out of class today you trip (绊倒) on a loose piece of carpet and twist your ankle. As a result of the injury, you lose your place in the local sports team, and have to miss an important job interview. Bad luck? Or an opportunity to get rich quick?

    Perhaps it's not surprising that Roslyn Darch of Houston, Texas, USA felt annoyed when she tripped over a toddler (学步的儿童) running around a furniture store, and broke her ankle. But a few months later, she was $780,000 richer after she successfully sued (起诉) the shop. The owners were clearly surprised at the size of Roslyn's payout, particularly since the toddler she tripped over was her own son.

    And it's not only claims for physical injuries that are keeping the lawyers busy. A group of overweight New York teenagers sued a giant fast-food company claiming that they had not had enough warning that a diet of burgers, fries and milk shakes would make them fat. The parents of one nineteen-year-old English schoolgirl successfully sued her school for 42,000 compensation when she failed to get a top grade in a university entrance exam. Sandra York received $113,000 from a Washington D.C. restaurant after slipping on a spilt soft drink.

    Who knows where it will end? Some say there should be penalties (处罚) for excessive (过度的) claims, or that there should be a limit on payouts. But one thing's for sure—in the end, the only certain winner is the lawyer!

    Finding a winter job is often a proof that you're growing up, and it's also a method for earning money to pay for what you dream of. It's never too early to start considering the future. Now, here are some good choices for you!

Retail (零售) Sales

    Retail offers plenty of opportunities for teens that are looking for a job. This type of work can pay from $10 to $15 an hour depending upon the duty you are expected to take on. It can also be great for teens who are friendly and enjoy talking to other people. For more information, call us at 4005075.

Food Service

    A job in the food service industry is a natural fit for sociable teens who enjoy communicating with the public. It allows employees to work as part of a team while learning about following instructions. It also comes with the opportunity to earn between $8 and $10 per hour. Just dial 4005077 for more information.

Babysitting

    This job requires someone who is highly responsible. Though it pays generally between $6 and $8 hourly, it also requires a lot of patience. This is a great choice for teens who wish to make a career in teaching, child care, social work or any other field that makes use of social skills or requires interaction with kids. Got a question? Just dial 4005076.

Housekeeping

    This type of work can bring in about $5 an hour and it will allow teens to learn the tourism industry, so hotels are often looking for more housekeeping staff, and parks often need more people to assist with keeping public areas clean and organized as well. Telephone: 4005079

Does your school have any problems with discipline? What happens when students step out of line? Here are some examples of bad behaviour:

    Playing truant(missing school without permission from parents).

    Stealing, smoking, hitting, swearing(说脏话), running, kissing.

    Cheating in exams.

    Calling a teacher or another pupil bad names.

    Not doing homework.

    Not listening or not paying attention in lessons.

    Wearing unsuitable clothes.

Here are some of the ways that UK school children can be punished:

Exclusion: a pupil is asked to leave the school and not come back. The pupil has to find a new school or a different method of education.

Suspension: a pupil cannot enter the building or attend lessons until the school has a meeting about their situation. Suspension can last from one to 45 days. The pupil is usually given work to do at home with a special teacher.

Detention: a pupil is asked to stay after school and work for 30—60 minutes before they Can leave.

Lines: a pupil has to write a sentence many times(e.g.100 or more)on a sheet of paper, e, g, “I must not shout in class”.

    Freya MacDonald, a 15-year-old pupil from Scotland, made the news when she refused to accept her school's punishment. Her family says that she was given 11 detentions for trivial things in class and coming into school through a fire door.

Freya says that repeated detentions disrupted her fight to an education under Scottish law and made it difficult for her to learn. She refused to return until the school respected her civil rights. She wants the headmaster and her teachers to sign a letter to promise this. Hundreds of schools in Scotland were told not to use detention as a punishment because of her legal action.

Many UK schools now give parents a home-school contract, explaining their discipline and rules. Parents must sign this document to agree that they accept the school's rules and discipline and that they are responsible for their child's behaviour.

    In my senior year of high school, I got a part-time job working at the local coffee shop. One miserable rainy day, Hank, one of my regular customers came in looking depressed and defeated. My co-worker and I asked what the problem was and if we could help, but he said he wouldn't want to tell any details. He just felt like going into bed, pulling the sheet up over his head, and staying there for a few years, and I knew exactly how he felt.

    Before he left, I handed him a bag along with his iced coffee. He looked at me questioningly because he hadn't ordered anything but the coffee. He opened the bag and saw that I had given him his favorite type of doughnut (油炸圈饼).

    "It's on me,"I told him."Have a nice day."

    He smiled and thanked me before turning around and heading back out into the rain.

    The next evening, when I was in the middle of making coffee, Hank drove up to the window. But instead of ordering anything, he handed me a single pink rose and a little note. I waited until I saw his Jeep leave the parking lot, then I ran to the back of the shop and read the note. It read:

    Christine,

    Thanks for cheering me up yesterday. It is so nice to meet someone that's genuinely sweet, warm and thoughtful and unselfish. Please don't change your ways because I truly believe that you will succeed. Have a great day!

    Hank

    As time went on, I did come across more complaining customers. But anytime I felt depressed, I thought of Hank and his kindness. Then I would smile, hold my head up high, clear my throat and ask politely," How can I help you?"