Forgiving(原谅) someone who has hurt you or let you down is never an easy thing. Several new studies, however, say that it could have a lot of health benefits. When you think of forgiveness, you probably don't think of it as being a health or medical problem. Studies from Stanford University, on the other hand, show that something like anger(愤怒) can change your well-being.

    When cartoon book characters like the Incredible Hulk get angry, they change colors and often gain special power. In the real world, anger is less obvious and may be more dangerous. That's why Professor Fred Luskin, founder of the Stanford Forgiveness Project and author of Forgive for Good, say holding on to anger and hatred(仇恨) can harm your physical and mental health. Two new studies seem to show the same idea. The studies find that people who are able to forgive feel less stress, less back pain, and less unhappiness. They also have fewer headaches, lower blood pressure and fewer problems on sleeping.

    So it doesn't matter if your anger is caused by the traffic or other things. Learning to let it go is important. Skills such as deep breath or thought can help. Or just ask yourself if it's worth hurting yourself by staying angry with someone else.

    Forgiveness doesn't mean that you simply accept what happened and say it's OK. Instead, it's a way of making peace with yourself about what happened in the past.

    Everybody is happy as his pay rises．Yet pleasure at your own can disappear if you learn that a fellow worker has been given a bigger one．Indeed, if he is known as being lazy, you might even be quite cross．Such behavior is regarded as "all too human", with the underlying belief that other animals would not be able to have this finely developed sense of sadness．But a study by Sarah Brosnan of Emory University in Atlanta, Georgia, which has just been published in Nature, suggests that it is all too monkey, as well．

    The researchers studied the behaviors of some kind of female brown monkeys．They look smart． They are good-natured, co-operative creatures, and they share their food happily．Above all, like female human beings, they tend to pay much closer attention to the value of "goods and services" than males．

    Such characteristics make them perfect subjects for Doctor Brosnan's study．The researchers spent two years teaching their monkeys to exchange tokens （奖券） for food．Normally, the monkeys were happy enough to exchange pieces of rock for pieces of cucumber．However, when two monkeys were placed in separate and connected rooms, so that each other could observe what the other is getting in return for its rock, they became quite different．

    In the world of monkeys, grapes are excellent goods （and much preferable to cucumbers）．So when one monkey was handed a grape in exchange for her token, the second was not willing to hand hers over for a mere piece of cucumber．And if one received a grape without having to provide her token in exchange at all, the other either shook her own token at the researcher, or refused to accept the cucumber．Indeed, the mere presence of a grape in the other room （without an actual monkey to eat it） was enough to bring about dissatisfaction in a female monkey．

    The researches suggest that these monkeys, like humans, are guided by social senses．In the wild, they are co-operative and group-living．Such co-operation is likely to be firm only when each animal feels it is not being cheated．Feelings of anger when unfairly treated, it seems, are not the nature of human beings alone．Refusing a smaller reward completely makes these feelings clear to other animals of the group．However, whether such a sense of fairness developed independently in monkeys and humans, or whether it comes from the common roots that they had 35 million years ago, is, as yet, an unanswered question．

    Thirteen-year-old Kaylee has a lot of friends—532, actually, if you count up both her Instagram followers and Facebook friends. And she spends a lot of time with them.

    But is it possible that Kaylee's online friendships could be making her lonely? That's what some experts believe Connecting online is a great way to stay in touch, they say. However, some experts worry that many kids are so busy connecting online that they might be missing out on true friendships.

    Could this be true? During your parents' childhoods, connecting with friends usually means spending time with them in the flesh. Kids played Scrabble around a table, not Words With Friends on their phones. When friends missed each other, they picked up the telephone. Friends might even write letters to each other.

    Today, most communication takes place online. A typical teen sends 2,000 texts a month and spends more than 44 hours per week in front of a screen. Much of his time is spent on social media platforms like Instagram and Facebook.

    In fact, in many ways, online communication can make friend ships stronger, “There's definitely positive influence. Kids can stay in constant contact, which means they can share more of their feelings with each other,” says Katie, co-author of the App Generation.

    Other experts, however, warn that too much online communication can get in the way of forming deep friendships. “If we are constantly checking in with our virtual worlds, we will have little time for our real world friendships.” says Rosen, a professor at California State University.

    Rosen also worries that today s kids might mistake the “friends” on the social media for true friends in life. However, in tough times, you didn't need someone to like your picture or share your tweet. You needed someone who would keep your secrets and hold your hand. You would like to talk face to face.

    The world's insects are going down the path of extinction, threatening a "catastrophic collapse of nature's ecosystems", according to the first global scientific review. More than 40％of insect species are declining and third are endangered, the analysis found. The rate of extinction is eight times faster than that of mammals, birds and reptiles.

    "It should be of huge concern to all of us, for insects are at the heart of every food web. They pollinate (授粉) the large majority of plant species, keep the soil healthy, recycle nutrients, control pests, and much more. Love them or 1oathe them, we humans cannot survive without insects, "said Prof Dave Goulson at the University of Sussex in the UK.

    The analysis, published in the journal Biological Conservation, says intensive (集约型) agriculture is the main driver of the declines, particularly the heavy use of pesticides. Urbanisation and climate change are also significant factors.

    "If insect species losses cannot be stopped, this will have catastrophic consequences for both the planet's ecosystems and for the survival of mankind. It is very rapid. In 10 years you will have a quarter less, in 50 years only half left and in 100 years you will have none," said review author Francisco Sánchez-Bayo, at the University of Sydney, Australia.

    One of the biggest impacts of insect loss is on many birds, reptiles, amphibians and fish that eat insects. "If this food source is taken away, all these animals starve to death," he said. Such effects have already been seen in Puerto Rico, where a recent study revealed a 98％fall in ground insects over 35 years.

    Matt Shardlow, at the conservation charity Buglife, said: "It is thoughtful to see this evidence that shows the pitiful state of the world's insect populations. It is increasingly obvious that the planet's ecology is breaking and there is a need for a strong and global effort to prevent and change these terrible trends."

    Susan couldn't help it. She and her friends began lunch with cheese. Then they ate cheeseburgers and drank milk. Things seemed fine, but then suddenly Susan's stomach started making noise. Her stomach hurt, and, racing to the restroom, she had terrible gas! She was so ashamed. She had been so excited to go to lunch with her friends that she totally forgot to watch how many dairy products (奶制品) she ate! Susan is lactose intolerant (乳糖不耐受的), and eating too many dairy foods can make her feel really sick.

    Lactose intolerance means that the body can't easily digest (消化) a special sugar called lactose. Unfortunately for Susan and millions of other people with this problem, lactose is found in almost all dairy products — cheese, milk and ice cream.

    Our body uses lactase (乳糖酵素) to break lactose into a simpler form of sugar. Once lactose is broken down, it's easy to digest and it provides great energy for the body. But people like Susan don't have enough lactase to break down all the lactose they take in. So, about half an hour to two hours after eating dairy­rich foods, their stomachs begin to hurt and they have gas, making their stomachs get bigger. Sometimes they even get diarrhea (腹泻) when they eat too many dairy foods.

    So how can someone living with this problem still eat out with his or her friends? Here are some tips. If you're going to eat a dairy­rich food like ice cream, eat something that doesn't have any dairy with it, like a salad or a sandwich without cheese. This will help slow digestion, and your body will have time to create more lactase.

    I remember the first time I got on a horse. When I was a little boy aged two, my mom agreed to let me take a short ride and that was it! From then on, I drove my parents crazy begging for a horse.

    When I was four, I had mutism, in which children stop speaking in certain social situations. I went days, weeks, months without a sound at school. At most, I might quietly whisper to a friend. I suffered silently through school until I was ten when a psychologist (心理学家) had an idea. He asked me what I wanted more than anything else in the world. He explained I was going to be given a chance to work for that. And I was permitted to whisper the answer in my mother's ear, "A horse."

    I was to get a pony, but I had to live up to my end of the bargain (讲价). I had a list of weekly tasks I had to finish. I had to answer the phone five times per week, something I had never done before. I had to say one word to my teacher at school and the list went on. For a child with mutism, saying one word to someone can be like climbing Mount Qomolangma. I did everything that was asked of me and the day came. His name was Sequoia, whom I fell in love with immediately. When I was in Sequoia's presence, I forgot all about my problems and felt strong and secure.

    I am a fully participating member of society these days. My horse and I made it through a master's degree. I may have made it otherwise, but I'm not sure. I feel I owe my life to the horse and I try to give it back to him. He has given me the best gift I could ever imagine, my life.