Last week my youngest son and I visited my father at his new home in Tucson, Arizona. He moved there a few years ago, and I was eager to see his new place and meet his friends.

My earliest memories of my father are of a tall, handsome successful man devoted to his work and family, but uncomfortable with his children. As a child I loved him; as a school girl and young adult I feared him and felt bitter about him. He seemed unhappy with me unless I got straight A's and unhappy with my boy- friends if their fathers were not as "successful" as he was. Whenever I went out with him on weekends, I used to struggle to think up things to say, feeling on guard.

    On the first day of my visit, we went out with one of my father's friends for lunch at an outdoor cafe. We walked around that afternoon, did some shopping, ate on the street table, and laughed over my son's funny facial expressions. Gone was my father's critical air and strict rules. Who was this person I knew as my father, who seemed so friendly and interesting to be around? What had held him back before?

    The next day my dad pulled out his childhood pictures and told me quite a few stories about his own childhood. Although our times together became easier over the years, I never felt closer to him than at that moment. After so many years, I'm at last seeing another side of my father. And in so doing, I'm delighted with my new friend. My dad, in his new home in Arizona, is back to me from where he was.

    In a paper published in the journey Science Advance, researchers describe how Matabele ants, a species of large ant known for attacking termite colonies (白蚁群落), will, after the battle, pick up injured fellow soldiers and carry them back to the nest where they can recover.

    The paper is the latest in a growing body of research that this form of helping behavior, previously observed in some mammals and birds, may not require complex emotion, and may, therefore, be far more widespread in nature than previously thought.

    “Here we have an example of an individual saving another individual,” says lead researcher Erik Frank who conducted the research. “We can be quite certain that the ants don't know why they are doing what they are doing.”

    It's a behavior that pays off for the colony. Our classic conception of worker ants is that they are essentially abandoned, but Mr. Frank and his colleagues calculated that the practice of rescuing nest mates results in a colony size that is a 28.7 percent larger than it would be had the ants left their fellow soldiers for dead.

    “These injured ants are able to recover from their injuries, ” says Frank. “They are essential for the safety and the betterment of the colony. ”

    When a Matabele ant is injured, as often happens during battles with termites, its body will give off two smelly chemicals that tell other ants to carry it back to the nest. Indeed, the researchers found that using these chemicals to seek help from uninjured ants will effectively activate the rescue behavior, supporting their theory that the ants were acting on pure instinct(本能), not more complex emotions.

    “The more we study rescue behavior in ants and other animals, the more we are going to realize that it's not just limited to the species we've observed so far, ” says Karen Hollis, a professor at Mount Holyoke College, mentioning studies that found that dolphins help other injured dolphins to the surface for air, capuchin monkeys defend each other during intergroup battles, and rats free other rats that are trapped.

    As health care costs continue to rise, a growing number of companies are working out programs designed to keep their employees healthy.

    Thomas Chapple is the senior vice president. “It's really important to us because medical costs are going up like crazy,” he says. “This company spends more than $ 200 million a year on medical costs for its employees around the country. The best thing we have seen as a way to control the medical cost is individual fitness.”

    “We have a fitness center,” Shawn Flaherty, director of public relations for Freddie Mac., says. “We have a health benefits plan that encourages people to work out three times a week, get cholesterol （胆固醇）checks, as well as 'do not smoke.' If they do that, it will cost them less for the health benefits.”

    Rachelle Clark works for Freddie Mac. “I feel great. You know the benefit is rewarding. I like to look good and feel healthy. I am just fortunate that I work for the company that provides some type of facility for the employees.”

    While on-site fitness centers are popular, some companies pay membership fees at local gyms for employees. The companies also offer classes such as boxing, yoga and dancing. Employees see those health programs as a valuable benefit.

    Tom Brook exercises five days a week. As a newspaper reporter he has a tight schedule, although Tom says it's not that difficult for him to make time for a workout. “It is great. It is right here where we work,” says Tom. “So everybody gets a chance to use it whenever they want to. I have lost weight and never been in better shape.”

    The programs may not be a magic cure for rising health costs, but they seem to have a positive impact on both employers and employees.

    A ten-year-old from Howell, Michigan is being praised as a hero thanks to his persistence (坚持) that led to saving the life of an elderly neighbor. The event happened late in an evening when Danny DiPietro was being driven home from hockey practice by his mom.

    That's when the young boy noticed an open garage (车库) and a figure that he believed was a dog outside an apartment building near his house. Given the freezing cold weather, the young boy got a feeling that something was not right. But instead of dismissing it like most kids his age would have, he insisted that his mother, Dawn, find out what was going on. Dawn tried to make Danny believe that no one would leave a dog out in such cold weather, but he refused to take no for an answer.

    Dawn finally gave in and decided to drive to the area with the family dog and see if there was any truth to Danny's hunch (直觉). Sure enough, as she got closer to the apartment building she noticed a garage that was wide open and someone waving madly for help. Upon getting there, she realized that it was not a dog the young boy had seen, but Kathleen St. Onge. The 80-year-old had fallen down on some ice in her garage and had been lying there for two hours, unable to get up.

    Dawn rushed home to get her husband to help and called 911. The two then returned with some blankets to cover Ms. St. Onge, while they waited for the ambulance (救护车) to arrive. Though still in hospital, the elderly woman is recovering well and forever grateful to Danny, for following up on his hunch!

    There are excellent reasons for anyone to seek out the optimistic. Optimists experience better health outcomes, live longer and are more satisfied with their relationships. Optimism enables people to hold on in the face of difficulty, while pessimism leaves them depressed and even expecting failure.

    I want that hopeful, optimistic outlook for my children. But many times we may feel pessimistic. The result of negativity makes me worry that my kids' future will be uncertain. Fortunately, research suggests ways to help our children grow up with an optimistic attitude and maintain a happier outlook ourselves.

    Humanity has improved by many measures, but that success has become the water in which we swim, and like fish, we take the water for granted. While we fail to notice the positive, our brains naturally emphasize on the negative. With practice, we can help our brains to give the good stuff equal weight. Dr. Hanson's advice: when you hear a great story or achieve something in your own life, deliberately rest your mind on that experience and stay with it. Sink into that feeling as it sinks into you. Describe what you're doing to your kids, and encourage them to dwell on their joys and pleasures as well.

    Following the "big scary" news can leave us feeling helpless. Find something in your area that makes you feel hopeful, and make it a part of your family life. Researchers found that when people with a pessimistic outlook use positive language to describe situations they find upsetting, their feelings about the situation become more positive. That's something we can try at home.

    Raising optimistic kids is hard because it demands that parents abandon the pessimistic perspective that's the easiest response to pessimistic times. Put your energy into making sure you and your family are a part of the world around you. That might mean simply joining and being part of local clubs that feed our natural human need for connection (not of the digital kind).

    The British Museum is a museum dedicated to human history, art and culture, located in the Bloomsbury area of London. Its permanent collection, numbering some 8 million works, is among the largest and most comprehensive in existence and originates from all continents, illustrating and documenting the story of human culture from its beginnings to the present.

    The British Museum was established in 1753, largely based on the collections of the physician and scientist Sir Hans Sloane. The museum first opened to the public on 15 January 1759 in Montagu House in Bloomsbury, on the site of the current museum building.

    Admission and opening times

    Free, open daily 10: 00—17: 30.

    The Museum is open every day except for 24, 25 and 26 December and 1 January.

    Museum galleries are open daily 10: 00—17: 30, and most are open until 20: 30 on Fridays.

    Closing starts from 17: 20 (20: 20 on Fridays).

    Tips for your school visit

    It's a good idea to come and see the Museum before your visit. Whatever your plans, please book in advance via the Ticket Desk to make sure you get the most out of your trip.

    Booking your visit

    Contact the Ticket Desk at ＋44(0)20 7323 8181 or tickets @ britishmuseum.org

    Cancellation

    If you are not able to attend a session you must inform the Ticket Desk at least three weeks before the session date. Failure to do so may incur a charge.

    Gallery availability

    Please book at least one term in advance and wait for confirmation before making travel plans. Greek and Egyptian galleries book up quickly. Opening times of some galleries may be limited at short notice—you will be contacted if necessary.

    Access and special educational needs

    The majority of galleries and all special exhibitions are fully accessible. There is a range of facilities for visual, hearing and mobility impaired students.

    Parking

    There is little on-street parking available. The nearest car park to the Museum is located at Bloomsbury Square, WC1A 2RJ. There is limited parking in the Museum's forecourt for disabled visitors only. To make arrangements please telephone＋44 (0)20 7323 8299 at least 24 hours in advance. You will be asked to provide the registration number, make and model of your vehicle and the date of your visit.

    Support us

    Your support is vital in enabling the Museum to fulfill its mission to share its collection with the world. The British Museum relies on funding from a wide range of sources and there are many ways that you can donate to help ensure the display, care and preservation of the collection for future generations.

    Please consider supporting the British Museum today.