Science has a lot of uses. It can uncover laws of nature, cure diseases, make bombs, and help bridges to stand up. Indeed science is so good at what it does that there's always a temptation(诱惑) to drag it into problems where it may not be helpful. David Brooks, author of The Social Animal: The Hidden Sources of Love, Character,and Achievement, appears to be the latest in a long line of writers who have failed to resist the temptation.

        Brooks gained fame for several books. His latest book The Social Animal, however, is more ambitious and serious than his earlier books. It is an attempt to deal with a set of weighty topics. The book focuses on big questions: What has science revealed about human nature? What are the sources of character? And why are some people happy and successful while others aren't?

        To answer these questions, Brooks surveys a wide range of disciplines（学科）. Considering this, you might expect the book to be a dry recitation of facts. But Brooks has structured his book in an unorthodox(非常规的), and perhaps unfortunate, way. Instead of introducing scientific theories, he tells a story, within which he tries to make his points, perhaps in order to keep the reader's attention.So as Harold and Erica, the hero and heroine in his story, live through childhood, we hear about the science of child development and as they begin to date we hear about the theory of sexual attraction. Brooks carries this through to the death of one of his characters.

On the whole, Brooks's story is acceptable if uninspired. As one would expect, his writing is mostly clear and, to be fair, some chapters stand out above the rest. I enjoyed, for instance, the chapter in which Harold discovers how to think on his own. While Harold and Erica are certainly not strong or memorable characters, the more serious problems with The Social Animal lie elsewhere. These problems partly involve Brooks's attempt to translate his tale into science.

    Grey clouds move as low as smoke over the treetops at Lolo Pass. The ground is white. The day is June 10.It has been snowing for the past four days in the Bitterroot Mountains.Wayne Fairchild is getting worried about our trek over the Lolo Trail-95 miles from Lolo Montana to Weippe in Idaho, across the roughest country in the West. Lewis and Clark were nearly defeated 200 years ago by snowstorms on the Lolo.Today Fairchild is nervously checking the weather reports.He has agreed to take me across the toughest,middle section of the trail.

    When Lewis climbed on top of Lemhi Pass,140 miles south of Missoula,on Aug.12,1805,he was astonished by what was in front of him;“high mountain chains still to the West of us with their tops partially covered with snow.”Nobody in what was then the US knew the Rocky Mountains existed,with peaks twice as high as anything in the Appalachians back East.

    Today their pathway through those mountains holds more attraction than any other ground over which they traveled,for its raw wilderness is an evidence to the character of two cultures:the explorers who braved its hardships and the Native Americans who prize and conserve the path as a sacred (神圣的)gift. It remains today the same condition as when Lewis and Clark walked it.

    The Lolo is passable only from July to mid-September.Our luck is holding with the weather,although the snow keeps getting deeper.As we climb to Indian Post Office,the highest point on the trail at 7,033 ft,we have covered 13 miles in soft snow,and we hardly have enough energy to make dinner.After a meal of chicken,I sit on a rock on top of the ridge (山脊）.There is no light visible in any direction,not even another campfire.For four days we do not see another human being.We are occupied with the things that mix fear with joy.In our imagination we have finally caught up with Lewis and Clark.

    Farah was sitting in the kitchen going over the party list with her mother. The exams were over and Farah wanted to invite her friends for a party.

    “Farah, aren't you going to invite Hafsa?” her mother asked. Hafsa had been her best friend since childhood.

    “Mother, you know I am now a part of Purple Girls Club and we have some rules about people we can be friends with,” Farah answered.

    “Really? And what are the rules?” her mother asked.

    “Well, only very pretty girls can be part of our group. And Hafsa is so, you know, dark.”

    “I cannot believe it.” her mother said angrily.

    As Farah left the kitchen, her father called her from the living room.

    Farah went to her father and paled when she saw the exam report in his hands.

    “Farah, what has happened to your grades? You have failed in Mathematics.” her father said.

    Farah had no answer. The truth was that the activities of Purple Girls Club left her with very little time for studies.

    “Farah, it says that you can take part in supplementary exams(补考). If your grades don't improve then, I'll cancel your trip to Spain.”

    Farah went to her room and called Gina, the leader of Purple Girls Club.

    “Gina, can you help me to complete my notes before the exams?”

    Gina laughed, “Exams? Who cares about exams?”

    One by one, she called her friends in the club but no one seemed to care or wanted to help. Farah knew Hafsa would help her. Farah also knew Hafsa had been hurt by her, but Hafsa said, “If you need any help, just let me know. We can study together till your exams.”

    Next Monday, as two friends entered the school together. Gina called out

    “Farah, you know our rules. You cannot be friends with those who do not belong to our club.”

    “Gina I have a new rule about friendship,” Farah replied.

    I've worked part time since taking early retirement ten years ago. I was inspired by an older friend. We worked for the same company, and he retired two years before I was also considered “spare”, as some companies call it.

    Soon after I left work, we had lunch together. First, he assured me that there was life after work. Then he related his own experience. He didn't want to take another full-time job, so he turned his daughter's old bedroom into a home office. He arranged for some consulting work from our old company, and he picked up more projects from other contacts. Soon he was working 20 to 30 hours a week. He wasn't making as much money. His kids were grown-up, so he didn't need as much income. “As soon as I left that job,” he told me, “my back problems went away. I started to eat better and get more exercise, I make half as much money, but I feel twice as good, and I'm twice as happy.”

    I decided to follow a similar track. At the time, my younger child almost finished college, so my parental responsibilities were winding down. We sold our old house and moved into a townhouse. I went to work for myself. And the result? Today I, too, make less money. But we make ends meet. And I feel twice as good and twice as happy.

    Our experience isn't for everybody. But a lot of people have retired early and lived to tell the tale, which proves it possible. Jack, another friend, was a salesman for a communication firm. He had a long distance to work and did a lot of traveling. He decided to leave the corporate world, in part because he had health problems and he wanted to spend more time with his family. Later, he quit his job with flexible hours and was restored to his health. And now he has found a part-time job, and he, together with his family, is leading a more relaxing life.

    Modern lifestyles are generally quite different from those of our hunter-gatherer ancestors, a fact that some claim as the cause of the current rise in global obesity, but new results published July 25 in the open access journal PLOS ONE find that there is no difference between the energy expenditure(耗费) of modern hunter-gatherers and Westerners, casting doubt on this theory.

    The research team behind the study, led by Herman Pontzer of Hunter College in New York City, along with David Raichlen of the University of Arizona and Brian M. Wood of Stanford measured daily energy expenditure among the Hadza, a population of traditional hunter-gatherers living in the open Savannah of northern Tanzania. Despite spending their days hiking long distances to seek for wild plants and game, the Hadza burned no more calories each day than adults in the U.S. and Europe. The team ran several analyses accounting for the effects of body weight, body fat percentage, age, and gender. In all analyses, daily energy expenditure among the Hadza hunter-gatherers was indistinguishable(难以区分的) from that of Westerners. The study was the first to measure energy expenditure in hunter-gatherers directly; previous studies had relied entirely on estimates.

    These findings overturn the long-held assumption that our hunter-gatherer ancestors expended more energy than modern populations, and challenge the view that obesity in Western populations results from decreased energy expenditure. Instead, the similarity in daily energy expenditure across a broad range of lifestyles suggests that habitual metabolic(新陈代谢的) rates are relatively constant among human populations. This in turn supports the view that the current rise in obesity is due to increased food consumption, not decreased energy expenditure. It means we have more to learn about human physiology(生理学) and health, particularly in non-Western settings.

    "These results highlight the complexity of energy expenditure. It's not simply a function of physical activity," says Pontzer.” Our metabolic rates may be more a reflection of our shared evolutionary past than our diverse modern lifestyles."

While conquering the world's swimming pools in the late 1990s and the 2000s, Amanda Beard had already included breathing exercises in her training. Several years after the end of her athletic career, she discovered walking meditation. Today the seven-time US Olympic medalist practices walking meditation in nature, around the house, or while walking the dog. It's a daily practice with the focused mindfulness of meditation that contributes positively to every aspect of her life, she says. 

You don't need equipment or a designated space to start. The idea of a walking meditation is to pay attention to the way your body feels, noticing things like the sky, trees, tuning into all of your senses. This means you can meditate "on the go" in the countryside, in the city, in your backyard, and virtually anywhere. A simple, 10-minute walking meditation for beginners requires that you just start at ease. Consider what you hear, smell and see. Think about how your feet touch the ground. Fully focus on these feelings. 

A report in Health Promotion Perspectives also found that walking meditation can improve your balance, adjust your heart rate, boost your mental focus, and help you battle anxiety and depression. "The benefits of meditation are many," says Dr. Schramm, a board-certified family physician and meditation teacher. "When we do this over and over again, we train the brain to focus on only one thing at a time and this increases both our blood flow and actual neuronal (神经元) changes within our brains. "

"The magic of meditation is to be able to help you connect with yourself; meditation shouldn't feel a certain way," says Tara Stiles, a yoga and wellness expert. It's a common mistake in meditation: People fear a wandering mind. "A wandering mind is completely normal," Stiles says. "Even experienced meditators aren't sitting there never having a thought, but when they have the thought they choose to guide themselves back to their breath instead of getting frustrated.