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    Stay-at-home kids are named “generation nini” in Spain. They are those adults who still live at home and are neither working nor studying. But the problem is not limited to Spain. It is a worldwide problem.

    In Italy, they are known as “bamboccioni” or big babies. There are nearly 60 percent of 18-34-year-old adults still living in their parents' home, up from almost 50 percent since 1983. Once kept there by the love for their mama's home-cooked food, the economic crisis(经济危机)has seen a rise in adults left unable to hold down a steady job or afford a home of their own. Last year, an Italian government minister admitted that his mother washed his clothes and made the bed for him until he was 30. He demanded a law forcing young Italians to leave their parents' home at 18 to stop them becoming hopelessly dependent on their parents.

In the UK, the government has made the term NEETS—not in employment, education or training for these children. In England alone the percent of NEETS aged 19-24 surged to 18.8 percent of the age group-in the last quarter of 2010, up 1.4 percent on the same period a year before. The number of British men in their 20s living with their parents has risen from 59 percent to 80 percent in the past 15 years, while the number of women has risen from 41percent to 50 percent. The average age of the first-time house buyers is now 38.

    In the US, the problem is known as the “full nest syndrome(综合症)”. Adults there are left struggling to support adult children who have stayed at home with student debts and facing few job opportunities in a weak economy. A recent study showed almost a third of American adults aged 34 and under are living with their parents

    Teenagers enter their adolescent years with a mixture of optimism, excitement and anxiety. Adolescence is a time when boys and girls begin to show greater independence from their parents. It is also a time when young people begin to develop the sense of individuality that will help shape their future identity as adults. In fact, showing independence and forming a unique identity are two of the most important developmental tasks that adolescents must finish in preparation for satisfying and productive adult lives.

    It is not easy for parents or teenagers to go smoothly through this period. Adolescents want to be independent of their parents and make their own decisions. They often do not recognize their need for adults' guidance and support.

    However, some parents find it easy to keep the lines of communication open with an adolescent child. These parents are often noticed by the child as stable sources of positive influence, and the teen feels supported in his or her growing independence. Communication in such families characterized by mutual(互 相的) respect and the ability to freely exchange feelings and ideas. Parents who understand their teenager's need for a reasonable measure of independence and individuality encourage their child's growth and achievements. This positive interest strengthens parent-child relationships. When adolescents receive parental approval and believe that parents really value their accomplishments, it creates a willingness to share other information about themselves.

    Many parents find it difficult to have open communication with their child during the adolescent years. Some parents have difficulty understanding the changes their teenager is experiencing and pay little attention to his or her need to pull away from the family and make independent decisions. At the same time, some teenagers are so self-focused that they do not appreciate or accept their parents' concern, and they are against all parental authority. In this case, frequent arguments may develop, and family life may become difficult. Parents and teenagers may separate from one another to avoid arguments, but this is usually a short-term solution that does not clear up the main problems.

    A major long-term method is to help them develop more effective communication. This enables the family members to end their conflicts(矛盾) and to establish more harmonious and more satisfying relationships.

    It is a question people have been asking for ages—is there a way to turn back the aging process?

    For centuries, people have been looking for a "fountain of youth." The idea is that if you find a magical fountain, and drink from its waters, you will not become old. Spanish explorer Juan Ponce de León searched for waters with magical powers in the early 1500s. But what he found instead is the American State of Florida.

    Researchers in New York did not find a fountain of youth in fact, but they may have found a way to turn back the aging process. It appears the answer may be hidden right between your eyes, in an area called the hypothalamus (丘脑下部).The hypothalamus is part of your brain. It controls important activities within the body, including growth, reproduction and the way we process food.

    Researchers at New York's Albert Einstein College of Medicine found that hypothalamus stem cells also influence how fast aging takes place in the body. What are stem cells? They are simple cells that can develop into specialized cells, like blood or skin cells. Stem cells can also repair damaged parts in the body.

    Professor Dongsheng Cai was the lead researcher in a study on aging in mice. Cai explains in the Journal Nature what they found. "Aging speed can be controlled by a particular place in the body, which is the hypothalamus. And it can be controlled by a particular type of cells, which are hypothalamus stem cells. I think these findings are quite interesting."

    He adds that when the hypothalamus starts aging, so does the body. "So when hypothalamus function is decreasing, particularly the loss of hypothalamus stem cells, this protection against the aging development is lost. It finally leads to aging."

    Using this information, the researchers began trying to activate (激活) the hypothalamus in mice. They did this by putting stem cells from younger mice into middle-aged animals. Later, the researchers examined mice and tested for changes in behavior. They also looked for changes in the strength of the animals' muscles and the way they worked. The researchers say the results show that the treatment slowed aging in the animals.

    Cai says when hypothalamus stem cells, which were derived from young mice was put into middle-aged mice, the mice aged slowly and they also have increased the length of their lives.

    But these results were just from studying mice in a lab. If the mice can live longer, does that mean people could have longer lives? The next step is to see if the anti-aging effects also work in human beings.

    When I was about 12 years old, my older brother, James, smuggled a BB gun into the house. Our parents had told us many times that we were not allowed to bring home guns or knives, even if they were just toys. Having any form of weaponry in our home was strictly forbidden.

    James brought me to his room. He opened his closet door and took out a shoebox that was buried beneath a heap of clothes. The BB gun was inside. I was immediately enamored by the shiny barrel.

    "Can I shoot it, Jamesie?" I asked, hopefully.

    "Noway,"James said, taking it from me and putting it back.

    One day, when no one was home, I went into James' closet and took it out. For some in explicable reason - I have no idea what I was thinking - I went to the front window of the second floor in our row house. I cracked the window open. I pointed the gun outside and shot. I quickly shut the window and peeked outside.

    In a matter of seconds, old Mr. Schlosberg came out of his grocery store. He looked back at his store window. He looked up the street. He looked down the street. Then he looked straight across to our house.

    Thankfully, Jamesie made it home before Mother or Father.

    As he stepped through the door, I could hear old Mr. Schlosberg call his name. "James, James," he called. "Come here, son."

    After several minutes, James ran back across the street and into the living room. I had retreated into the kitchen. "Alma!" he screamed. "Get out here! You cracked Mr. Schlosberg's window with my BB gun!"

    "Oh, please, Jamesie," I begged. "Don't let him tell Mother. She will whip my bottom real good!" Jamesie sighed. He wiped my tears and went back across the street to Mr. Schlosberg's. I don't know what James said to that man, but there was never a mention of the incident again.

    Years later, I found out Jamesie had used the money he got from his newspaper route to pay for Mr. Schlosberg's cracked window. He only got one cent for every paper he delivered. He managed to pay back the debt just before he went off to fight in World War II.

    Since that day, I have never touched a gun: a BB gun, a water gun, a real gun, or any other type.

Research has found that using wood for construction instead of concrete and steel can reduce emissions. But Tim Searchinger at Princeton University says many of these studies are based on the false foundation that harvesting wood is carbon neutral (碳中和). "Only a small percentage of the wood gets into a timber (木料) product, and a part of that gets into a timber product that can replace concrete and steel in a building," he says. Efficiencies vary in different countries, but large amounts of a harvested tree are left to be divided into parts, used in short-lived products like paper or burned for energy, all of which generate emissions.

In a report for the World Resources Institute, Searchinger and his colleagues have modelled how using more wood for construction would affect emissions between 2010 and 2050, accounting for the emissions from harvesting the wood. They considered various types of forests and parts of wood going towards construction. They also factored in the emissions savings from replacing concrete and steel.

Under some circumstances, the researchers found significant emissions reductions. But each case required what they considered an unrealistically high portion of the wood going towards construction, as well as rapid growth only seen in warmer places, like Brazil. In general, they found a large increase in global demand for wood would probably lead to rising emissions for decades. Accounting for emissions in this way, the researchers reported in a related paper that increasing forest harvests between 2010 and 2050 would add emissions equal to roughly 10 percent of total annual emissions.

Ali Amiri at Aalto University in Finland says the report's conclusions about emissions from rising demand are probably correct, but the story is different for wood we already harvest. "Boosting the efficiency of current harvests and using more wood for longer-lived purposes than paper would cut emissions," he says. "We cannot just say we should stop using wood."