The brain of an insect isn't very big. But insects are somehow still able to make lots of important decisions. Bees, ants and roaches(蟑螂) build hives(巢穴)with thousands of workers doing specialized work. The jobs are done without a head or even a plan. How do insects manage this?

    To solve the mystery, scientists in Belgium spent months building robotic roaches and then putting them among real roaches. The final goal of the research is to find out how the simple behavior of individuals gives rise to a collective decision. The roach is a good starting point for trying to answer the big question because its social system is simple enough for scientists to study.

    The first step was to build robots that real roaches would accept as their own. Although the robotic roaches don't look much like the real thing, they have similarities with them in three key ways: they naturally head toward dark areas, they are influenced by the behavior of other roaches, and even more importantly, they smell like roaches.

    The next step was getting the robotic and real roaches to work together on common tasks. In experiments, the robots would collectively head towards a dark place, copying the behavior of natural roaches. That got the researchers wondering: if you program the robotic roaches to go woward the lighted place, would the real roaches follow, going against their natural instincts.(本能) ?

    They will – it turned out. Many of the real roaches followed the robots to a lighter shelter. But influence turned out to be a two- way street. On occasion, the real roaches were able to override the programming of the robot roaches and get them to turn into dark hiding places. Being social creatures, both the robotic and natural roaches were paying attention to and following the example set by others.

    In theory, it would be possible to create a robot that could influence collective decision-making in humans. To do this, researchers would have to invent a robot that people would accept. Fortunately, the technology isn't there yet.

    Christopher Thomas, 27, was a writer by night and a teacher by day when he noticed he was always tired and was losing weight fast. Diagnosed with diabetes (糖尿病), Thomas would need to inject himself with insulin (胰岛素) three times a day for the rest of his life or risk nerve damage, blindness, and even death. And if that weren't bad enough, he had no health insurance.

    After a month of feeling upset, Thomas decided he'd better find a way to fight back. He left Canton, Michigan for New York, got a job waiting tables, nicknamed himself the Diabetic Rockstar, and created diabeticrockstar.com, a free online community for diabetics and their loved ones—a place where over 1,100 people share personal stories, information, and resources.

    Jason Swencki's son, Kody, was diagnosed with type diabetes at six. Father and son visit the online children's forums (论坛) together most evenings. “Kody gets so excited, writing to kids from all over,” says Swencki, one of the site's volunteers. “They know what he's going through, so he doesn't feel alone.”

    Kody is anything but alone: Diabetes is now the seventh leading cause of death in the United States, with 24 million diagnosed cases. And more people are being diagnosed at younger ages.

    These days, Thomas's main focus is his charity (慈善机构), Fight It, which provides medicines and supplies to people—225 to date—who can't afford a diabetic's huge expen­ses. Fight－it.org has raised about $23,000—in products and in cash. In May, Thomas will hold the first annual Diabetic Rockstar Festival in the Caribbean.

    Even with a staff of 22 volunteers, Thomas often devotes up to 50 hours a week to his cause, while still doing his full­time job waiting tables. “Of the diabetes charities out there, most are putting money into finding a cure，” says Bentley Gubar, one of Rockstar's original members. “But Christopher is the only person I know saying people need help now.”

    One of the most exciting and interesting international cities to visit is London, England. Here is a look at four free things to do during a vacation to London.

    Visit the Trafalgar Square

    Built more than 200 years ago, Trafalgar Square is a popular gathering place for locals and travelers, too. The area is close to good shopping and dining opportunities, and there are usually some sorts of public events or celebrations going on there during most weekends.

    Wander Along the Thames

    Visitors wanting to sec some great architecture, attractions and views should spend an afternoon walking along the River Thames. The best place to start is at the world-famous London Bridge crossing over the river and you can walk all the way to Westminster Bridge a short distance away. Travelers doing this will find themselves passing by a great many historic buildings.

    Explore the Local Markets

    While purchasing items at any of the open markets in London is not necessarily free, walking through them to view the merchants（商人）, their products and the other shoppers is of great fun. Some of the popular open markets in London worth visiting include Spitafields Market, Portobello Road Market and Leadenhall Market.

     Visit the British Museum

    One of the top museums in the entire United Kingdom can be found in London, and it charges no admission（人场费）for entry. This museum is so highly regarded that it is not only popular with locals and tourists, it is also seen as a major and valuable scholarly resource.

    Mid-afternoon on a particularly busy Tuesday, I took leave of my desk at work and walked into a local Starbucks only to find a space where neither my clients nor my children would ask me to do something.

    Inside, I ran into Kate, a co-worker of mine. The topic of parenthood came up. I complained about how packed my schedule was. From the minute I woke up to the minute I fell asleep, I was constantly in demand and always had someone knocking at the door. But a bit of sadness seemed to come over Kate's face.

    "Well, my daughter's in San Francisco and she doesn't seem to need me at all these days," Kate said. It was in that moment that I realized although I might often feel in high demand, there will come a day when I will actually miss that same stress I then complained about.

    And as our conversation continued, it turned to our children's younger years, with Kate smiling proudly, thinking of the little boy and girl she raised who are now a man and a woman. But I noticed her smile was marked with regret. She explained that she often wondered about what she could have done differently when her children were in their earlier years.

    This got me thinking. Is regret an unfortunate footnote (注脚) to parenthood? With that in mind, I asked six older parents one question: What is your biggest regret from your early days as a parent?

    It turned out that all of them thought they could have done it better. But, each of them also has a strong, healthy relationship with their kids. Whatever regrets their parents might have had about their upbringing, one thing is clear —— it didn't affect them in a meaningful way.

    The bottom line is, we all feel like we could be doing this parenting thing better. And quite clearly, years later, we're still going to look back and wish we tried things differently. But the past can't be changed, and neither should it.

    Everyone is welcome to visit our city Los Angeles (LA). I am sure you can do many things in Los Angeles with your kids.

    Fun at the Beach

    Thanks to its almost perfect weather all through the year, a visit to the beach is one of the best things to do when in Los Angeles with your kids. While they enjoy themselves nearby, you can simply lie back and have a good rest in the sun.

    Trip to Disneyland

    A trip to the City of Angels with your little angels is incomplete (不完整的) without a visit to the Magic Kingdom. The joy they'll feel from being around all those Disney characters that they know and love will light up your day, too.

    Visit to the Museum

    If you want to turn your stay in LA into an educational one for your kids, you should visit the museum. Starting with the Natural History Museum of Los Angeles County to the California Science Center, or even the Kidspace Children's Museum in Pasadena, you have many choices. I'm sure a visit to all these places will make your kids smarter.

    Visit to the University Studios Hollywood

    Your kids could get to see interesting things from some of the most popular movies ever. From the theme park of Jurassic Park to Wisteria Lane from the TV play Desperate Housewives, the Universal Studios Hollywood is a place that we all find wonderful.

    There was great excitement on the planet of Venus this week. For the first time Venusian scientists managed to land a satellite on the planet Earth, and it has been sending back signals as well as photographs. The satellite was directed into an area known as Manhattan. Because of excellent weather conditions and extremely strong signals, Venusian scientists were able to get valuable information about the feasibility of a manned flying saucer landing on Earth. A press conference was held at the Venus Institute of Technology. "We have come to the conclusion, based on last weeks satellite landing, "Prof. Zog said, that there is no life on Earth.”

    “How do you know this? "the science reporter of the Venus Evening News asked "For one thing, Earth s surface in the area of Manhattan is composed of solid concrete and nothing can grow there. For another, the atmosphere is filled with carbon monoxide and other deadly gases and nobody could possibly breathe this air and survive. “Are there any other sources of danger that you have discovered in your studies?

    “Take a look at this photo. You see this dark black cloud staying over the surface of Earth? We don' t know what it is made of, but it could give us a lot of trouble and we shall have to make further tests before we send a Venus Being there.”

    “Over here you will notice what seems to be a river, but the satellite findings indicate it is polluted and the water is unfit to drink.”

    “Sir, what are all those tiny black spots on the photographs?

We're not certain. They seem to be metal particles that move along certain paths. They give gases, make noise and keep crashing into each other.

    “Prof. Zog, why are we spending billions and billions of Zilches to land a flying saucer on Earth when there is no life there?"

    “Because if we Venusians can learn to breathe in the Earth atmosphere, then we can live anywhere.”