If you want to slow aging, you might want to eat less. This finding is good news—if you were a mouse. The researchers studied mice, not people.

    John Price and other researchers studied two groups of mice. One group was able to eat as much as it wanted. The researchers limited what the mice in the other group ate. Their diet had 35 percent fewer calories than the first group of mice.

    Price says the mice with the diet restrictions were “more energetic and suffered fewer diseases.” They were not just living longer but seemed to stay younger for a longer period of time.

    The researchers found that fewer calories slow down a natural mechanism in cells called ribosomes. Price explains that ribosomes are responsible for making important proteins in the cells. But with fewer calories, they slow down. This gives the cells more time to repair themselves.

    The researchers say ribosomes use from 10 to 20 percent of the cell's energy to make those proteins. Price wrote that “because of this, it is impractical to destroy an entire ribosome” when it starts to break down. However, “repairing individual parts of the ribosome on a regular basis enables ribosomes to continue producing high quality proteins for longer than they would otherwise. This top quality production, in turn, keeps cells and the entire body functioning well.”

    Price said, “ribosome is a very complex machine, like a car.” They need “maintenance to replace the parts that wear out the fastest. When tires wear out,” he explained, “you don't throw the whole car away and buy a new one. It costs less to replace the old tires.”

    “Food,” he said, “isn't just material to be burned—it's a signal that tells our body and cells how to respond.” Price said the findings help to explain how exactly our bodies age. And this may “help us make more educated decisions about what we eat.”

    Boston Tourist Attractions and Sightseeing

    Duck Tours

    One of the most popular tours in and around Boston are the legendary Duck Tours, which show you the best that the city has to offer. World War II vehicles take you on a scenic drive around the most famous sites and attractions in the city. With interesting explanation, this novel tour is an enjoyable and fun way to see the city and very much recommended.

    New England Aquarium

The aquarium is home to over 7,000 fish and a collection of many different sea creatures. The city's most visited tourist attraction is complete with exhibit space, gift shop and a cafe with spectacular views of the city and harbor. It also offers whale-watching tours with indoor and outdoor seating — and even seal or walrus (海象) shows.

    Boston Public Library

    Built in 1848, the Boston Public Library was the first free publicly supported city library in America. With more than 650,000 photographs, 100,000 prints and 250 different papers in the “Newspaper Room” the library now has Internet access, two restaurants and an on-line store with reproductions of its priceless artwork. All exhibits are open to the public and books m only the beginning.

    Bull and Finch Pub - Home of Cheers

    This world-famous pub is the inspiration for the hugely successful sitcom (情景喜剧) “Cheers”. Although the outside is the same as on television, the inside is completely different. However, although unexpected, this is not a real disappointment as the busy pub is full of reminders of Cheers. The menu serves typical bar food, and is very popular with tourists

    If visiting family or staying at one of the luxury Boston hotels downtown, you may want to corner purchasing a “Boston City Pass” as this will enable you to pay half price for most the finest attractions.

    Joy Mangano was 33 and divorced. She had three kids under age 7, and was barely keeping up payments on her small two-bedroom home by working extra hours as a waitress. “There were times when I would lie in bed and think, I don't know how I'm going to pay that bill,” Mangano says.

    But he had a special ability for seeing the obvious thing. She knew how hard it was to mop the floor. “I was tired of bending down, putting my hands in dirty water, wringing (拧) out a mop,” Mangano says. “So, There's gotta be a better way.

    How about a “self-wringing” mop? She designed a special tool you could twist in two directions at once, and still keep your hands clean and dry. She set out to sell it, first a few at flea markers.

    Then Mangano met with the media. But would couch potatoes (电视迷）buy a mop? The experts on shopping TV were less than certain. They gave it a try, and it failed. Mangano was sure it would sell if they'd let her do the on-camera display. She said, “Get me on that stage, and I will sell this mop because it's a great item.”

    So QVC, a multinational corporation specializing in televised home shopping, took a chance on her. “ I got onstage and the phones went crazy. We sold every mop in minutes.”

    Today she's president of Ingenious Designs, a multimillion-dollar company, and one of the stars of HSN, the Home Shopping Network. Talking about the household invention, Mangano says, “It is as natural for me as it is for a parent to talk about their child.”

    Last Sunday, my whole family went to the amusement park near our hometown. As we planned the day before, on my brother's 13th birthday. David was two years older than I.

The weather was perfect and everyone was happy. The park was not too crowded. "Fioda," said my brother, "do you want to go on that ride with me?" "Of course," I said. The ride was brand new. I saw commercials(广告) for this huge roller coaster(过山车） on television. I was so excited to ride it. As we got in line, we talked excitedly about what we might experience. We decided that we would both try to keep our hands in the air the whole time. We believed that would make it even more enjoyable. I was so busy talking to my brother that I missed the most important sign—-Empty your pockets before going on the ride. Something bad happened!

    The ride started. It was a really fast roller! Before I knew it, we were upside down. I felt my phone slipping（滑落） from my pocket. My hands were in the air, just as we had promised, and I didn't catch my phone in time. It hit me on the head, fell down to the ground and broke. My parents said I wouldn't have a new phone until I had enough money to pay for it. I need to be more careful. Next time, I'll pay better attention the warning signs as we wait in line for the ride.

    An open office is supposed to force employees to cooperate. To have them talk more face to face. To get them off instant messenger (IM) and brainstorming new ideas. But a recent study by two researchers offers evidence to support what many people who work in open offices already know: It doesn't really work that way. The noise causes people to put on headphones and tune out. The lack of privacy causes others to work from home when they can. And the sense of being in a fishbowl means many choose email over a desk-side chat.

    Ethan Bernstein and Stephen Turban, two Harvard Business School professors, studied two Fortune 500 companies that made the shift to an open office environment from one where workers had more privacy. Using “sociometric” electronic badges (徽章) and microphones, as well as data on email and instant messenger use by employees, the researchers found in the first study that after the organization made the move to open-plan offices, workers spent 73% less time in face-to-face interaction. Meanwhile, email use rose 67% and IM use went up 75%.

    The participants wore the badges and microphones for several weeks before the office was redesigned and for several after, and the company gave the researchers access to their electronic communications. The results were astonishing. “We were surprised by the degree to which we found the effect,” Bernstein said. The badges could tell that two people had a face-to-face interaction without recording actual spoken words. The researchers were careful to make sure other factors weren't in question—the business cycle was similar, for instance, and the group of employees were the same.

    In a second study, the researchers looked at the changes in interaction between specific pairs of colleagues, finding a similar drop in face-to-face communication and a smaller but still significant increase in electronic correspondence.

    Another wrinkle in their research, Bernstein said, is that not only did workers shift the way of communication they used, but they also tended to interact with different groups of people online than they did in person. Moving from one kind of communication to another may not be all bad—“maybe email is just more efficient,” he said—but if managers want certain teams of people to be interacting, that may be lost more than they think. The shift in office space could “have strong effects on productivity and the quality of work”.

    Bernstein hopes the research will offer evidence that will help managers consider the possible trade-offs of moving to an open office plan. In seeking a lower cost per square foot, they buy into the idea that it will also lead to more cooperation, even if it's not clear that's true. “I don't blame the architects,” he said. “But I do think we spend more of our time thinking about how to design workplaces based on the observer's angle”—the manager—“rather than the observed.”

 "A moth (飞蛾) to a flame" is often used to indicate an inescapable attraction, yet it is a strange example of animal behavior that continues to confuse people today. Scientists have raised a number of theories over the years to explain why. One holds that insects flying at night are following their nature to fly toward the brightest spot in their field of vision, which they mistake for the sky. Another suggests that insects are trying to warm themselves with the heat produced by the light. The most popular theory, though, is that insects are confusing lights with the moon or other celestial bodies (天体) that they normally use to navigate (导航).

To find out the real reason, the team carried out a first set of experiments in an insect flight area. The researchers used eight high-speed infrared (红外线) cameras equipped with motion-capture technologies to track 30 insects from three moth and two dragonfly species. They also flew lab-raised insects from six different insect orders that were too small for motion-capture technology, including fruit flies and honeybees, to make sure different insects all showed similar responses to light. Working with co-author Pablo Allen of the Council on International Educational Exchange in Monteverde, Costa Rica, the researchers put heavy cameras, lights and tripods in two field sites to gather behavioral data from insects in the wild.

The team was able to confirm that insects were not beelining to the light but rather circling it as they tilted (倾斜) in an attempt to turn their backs toward it. This behavior, known as a "dorsal light response", normally helps insects to remain in an unchanging path of flight that is properly lined to the horizon (地平线). Artificial light that arrives from a point source causes them to fly in unpredictable patterns as they try to turn their backs to what they are mistaking for the sky.

Now research might have finally solved the mystery mentioned first: artificial light confuses insects' ability to turn themselves to the horizon, confusing their sense of what is up and down and causing them to fly in circles.