A typical school day in the UK starts around 8:30 am. This is often even earlier elsewhere in the world, with students sitting down to their first lesson at 7:30 am in the US. The average teenager ideally needs eight to nine hours' sleep each night, but in reality a lot of teenagers struggle to get this much. A lot of the problems arise because our sleep patterns are not fixed, and they change as we grow.

So a later school start time could help to solve this problem, by ensuring to get their eight plus hours of sleep and react properly to their body's natural rhythms (规律). There has been a general shift over the past 25 years to shorten the school day. This is not at the cost of teaching time (which has remained constant) but at the cost of natural breaks, which has led to reduced lunch time and lesson breaks.

Later start times could help teens' grades and health. This is mainly because it makes the management of children easier. Supervising (监管) hundreds of children “playing” requires effective staffing (人员配备). And there is always the fear that behavior worsens during breaks. So the theory goes that having them in class and strictly supervised must be better.

    But this means that students barely have enough time to absorb what they were doing in maths before suddenly they are thrust into ancient history. And teaching staff also transit from one class to another, with hardly a rest or time to refocus.

    Clearly rethinking the school day could benefit everyone involved. Anyway, it could also lead to better achievement in teenagers and less of a struggle for parents in the mornings. For teachers, it could also mean a less stressful day all around and what could be better than that?

    “Sesame Street” has been called “the longest street in the world”. That is because the television program by that name can now be seen in so many parts of the world. That program became one of American's exports soon after it went on the air in New York in 1969.

    In the United States more than six million children watch the program regularly. The viewers include more than half the nation's pre-school children, from every kind of economic, racial, and geographical group.

    Although some educators object to certain elements in the program, parents praise it highly. Many teachers also consider it a great help, though some teachers find that problems arise when first graders who have learned from “Sesame Street” are in the same class with children who have not watched the program.

    Tests have shown that children from all racial, geographical, and economic backgrounds have benefited from watching it. Those who watch it five times a week learn more than occasional（偶然的）viewers. In the US the program is shown at different hours during the week in order to increase the number of children who can watch it regularly.

    The programs all use songs, stories, jokes, and pictures to give children a basic understanding of numbers, letters and human relationships. But there are some differences. For example, the Spanish program, produced in Mexico City, devotes more time to teaching whole words than to teaching separate letters.

    Why has “Sesame Street” been so much more successful than other children's shows? Many reasons have been suggested. People mention the educational theories（理论）of its creators, the support by the government and private（私人的）businesses, and the skillful use of a variety of TV tricks. Perhaps an equally important reason is that mothers watch it along with their children. This is partly because famous adult stars often appear on it. But the best reason for the success of the program may be that it makes every child watching feel able to learn. The child finds himself learning, and he wants to learn more.

    At the age of 83, I'm reading more and dusting less. I'm sitting in the yard and admiring the view without caring about the weeds in the garden. I'm spending more time with my family and friends and less time working.

    Whenever possible, life should be a pattern of experiences to savor, not to suffer. I'm trying to recognize these moments now and cherish them.

    I'm not "saving" anything; we use our good china and crystal for every special event such as losing a pound, or the first Amaryllis blossom. I wear my good clothes to the market. I'm not saving my good perfume for special parties, but wearing it for clerks in the hardware store and tellers at the bank.

    "Someday "and" one of these days" are losing their positions in my vocabulary. If it's worth seeing or hearing or doing, I want to see and do it now.

    I'm not sure what others would have done had they known they wouldn't be here for the tomorrow that we all take for granted. I think they would have called family members and a few close friends. They might have called a few former friends to apologize and mend fences for past quarrels. I like to think they would have gone out for a Chinese dinner or for whatever their favorite food was.

    It's those little things left undone that would make me angry if I knew my hours were limited. Angry because I hadn't written certain letters that I intended to write one of these days. Angry and sorry that I didn't tell my husband and parents often enough how much I truly love them. I'm trying very hard not to put off, hold back, or save anything that would add laughter and luster to our lives. And every morning when I open my eyes, I tell myself that it is special. Every day, every minute, every breath truly is a gift.

    According to a recent report, about 15% of the people in the UK are members of gyms. But are they more likely to be fit?

    A study found that gym members were 14 times more active than people who didn't belong to any health club. Gym members did six hours more exercise a week, and this activity did make them fitter than non-gym members. They also spent less time sitting down every day than non-gym members. The results were the same for men and women.

    The study included 405 people between the ages of 30 and 64, and the main characteristics of those who were gym members were the same as those who were not. “But gym members did more training than non-gym members,” said the lead author, Elizabeth Schroeder of the University of Illinois.

    While it might seem clear that gym members exercise more and are healthier than non-gym members, Schroeder says this has not been directly shown before. However, the study is only designed to show a tie between gym membership and more exercise. It may be that active people like to join gyms. In the study, people who exercised as much as gym members were also in good health.

    You can get the same benefits wherever you exercise. This study shows a gym membership can make you do more exercise, but other research shows that exercising outside has other help. Outdoor activity can make you feel happy about life—especially if you run through a forest.

    Outdoor exercise is also more interesting than going to the gym. The first five minutes of outdoor exercise is especially helpful in making people feel good. But Schroeder says that a gym may also encourage greater exercise because it can be social and fun.

    Most groups of plants and animals are richer in species and more plentiful near the equator. In the ocean, that holds true for cold-blooded predators(掠食者). But warm-blooded predators are more diverse toward the poles and noticeably missing from several warm hot spots. Why?

    John Grady, an ecologist, and his team considered the possibility—warm-blooded animals need a lot to fuel their metabolism(新陈代谢). Perhaps colder waters are just richer in small fish? But they found that at higher, colder places, there isn't actually much more food around. It's more that warm-blooded animals are eating a much bigger share of it than their cold-blooded competitors.

    The real explanation is simple. An animal's speed, swiftness, and intelligence depend on its metabolism, which in turn depends on its temperature. Since birds and mammals can keep heating their bodies in icy conditions, they remain fast and attentive. By contrast, the fish they hunt become slower and duller. At some tipping point of temperature, seals, dolphins, and penguins start out swimming their prey(猎物). They become more likely to come upon targets and outpace the cold-blooded predators of their own.

    In Grady's words, "Warm-bodied predators are favoured where preys are slow, stupid and cold." That's why sharks and other predatory fish dominate near the equator, but colder waters are the kingdom of whales and seals. By keeping food to themselves in the poles, these creatures can then specialize on specific types of prey, which makes them more likely to split into separate species. The killer whales of the North Pacific, for example, include mammal-eating transients and fish-eating, year-round residents.

    But the world is changing. It's likely that the surface of the oceans will warm by 2 to 3℃ within this century. Grady's team estimates that every time the ocean's surface warms by 1℃, populations of sea mammals will fall by 12%, and populations of seals and sea lions will fall by 24%.

    But "predictions are hard," Donna Hauser from the University of Alaska Fairbanks notes. "Polar bears are losers of a warming world, but some populations are still doing well. Some groups of whales have changed the timing of their migrations; others are hunting in deeper, colder waters. These changes might make sea mammals more adaptable to changing climates. Maybe they just need to find the places where fish remain slow, stupid and cold."

    A painter has just completed his course. He took 3 days and painted beautiful scenery. He wanted to know people's opinion about his talent and painting skills.

    He put his creation at a busy street and just down below a board which read—"I have painted this piece. Since I'm new to this profession I might have committed some mistakes. Please put a cross wherever you see a mistake."

    While he came back in the evening to collect his painting he was completely shattered to see that whole canvass(画板)was filled with crosses, they criticized the painter ruthlessly.

    Disheartened and broken completely he ran to his master's and burst into tears.

    This young artist complained, "I'm useless and if this is what I have learnt to paint I'm not worth becoming a painter. People have rejected me completely."

    Master smiled and suggested, "My son, I will prove that you are a great artist and have learnt flawless painting. Do as I say without questioning it. It will work."

    Young artist agreed and two days later early morning he presented a replica(复制品) of his earlier painting to his master. Master took that gracefully and smiled.

    "Come with me." master said.

    They reached the same street early morning and displayed the same painting exactly at the same place. Now master took out another board which read—"Gentlemen, I have painted this piece. Since I 'm new to this profession I might have committed some mistakes in my strokes etc. I have put a box with colors and brushes just below. Please do a favor. If you see a mistake, kindly pick up the brush and correct it."

    Then they walked back home.

    They both visited the place the same evening. The young painter was surprised to see that actually there was not a single correction done so far. Next day again they visited and found painting remained untouched. They say the painting was kept there for a month for no correction came in!