Our body clock, or natural body rhythm, influences our energy and alertness. Paying attention to it can help us choose the suitable time of the day when we best perform specific tasks.

    The reality, however, is that most of us organize the time around work demands, school deadlines, commuting or social events. Doing whatever the body feels like doing is a luxury in today's fast-paced modern society.

    But that doesn't mean it isn't worth trying. Obeying our body clock has significant health benefits. Disrupting our natural body rhythm, on the other hand, has been linked to problems such as depression, obesity, or headache, says Steve Key, a biology professor.

    When the body clock can synchronize (使…同步) the rhythms of its natural processes, it “gives us an advantage in daily life”, says Key.

    According to him, when it comes to cognitive (认知的) work, most adults perform best in the late morning. As our body temperature starts to rise just before awakening in the morning and continues to increase until midday, our memory, alertness and concentration gradually improve.

    However, he adds, our ability to concentrate typically starts to decrease soon thereafter. Most of us are more easily distracted (分心) between noon and 4 pm.

    Alertness also tends to fall after eating a meal and sleepiness tends to peak around 2 pm, making that a good time for a nap.

    Surprisingly, tiredness may increase our creative powers. For most adults, problems that require open-ended thinking are often best dealt with in the evening when they are tired, according to a study in the journal Thinking & Reasoning.

    When choosing a time of the day to exercise, paying attention to your body clock can improve results. Physical performance is usually best from about 3 to 6 pm, says Michael Smolensky, a professor of biomedical engineering.

    Of course, not everyone's body clock is the same, making it even harder to synchronize natural rhythms with daily plans.

    What makes a building ugly? Everyone's got their own opinion, so it's hard to say. Now, let's take a look at some of the world's worst buildings.

    The Torre Velasca

    The Tone Velasca in Milan is in the centre of Milan (Italy). The tower, which went up in the 1950s, is about 100 metres tall. Its design is actually a modern representation of a traditional Lombard castle, where the lower parts were narrower (狭窄的）than the upper parts.

    The Mirador Building

    The Mirador Building in Madrid (Spain) was created by Dutch studio MVRDV and the Spanish architect Blanca Lleo. The building, which is a block of flats, opened in 2005. There is a large rectangular (矩形的）hole in the upper part of it, which is used by the neighbourhood as a meeting area and playground.

    The Prague TV Tower

    The Prague TV Tower is in Prague (the capital of the Czech Republic). It stands 216 metres high and looks a bit like a tall, thin space ship. Prague is famous for its architectural beauty,so when the tower was put up in 1985 by architect Vaclav Aulicky and engineer Jiri Kozak, many felt it didn't fit in.

    The Longaberger Basket Company

    The Longaberger Basket Company building is in Newark, Ohio (USA). The office block was opened in 1997 and looks like a very large basket. It，s got seven floors and two handles at the top. The handles weigh about 150 tons. It may not be the ugliest building in the world but it's certainly one of the most unusual.

    When she moved the covering cloth to look upon his tiny face, she was shocked. The doctor turned quickly and looked out the tall hospital window. The baby had been born without ears.

    Time proved that the baby's hearing was perfect. When he rushed home from school one day and threw himself into his mother's arms, she sighed, knowing that his life was to be full of heart- breaks for his imperfect appearance.

    He grew up, handsome for his misfortune and popular with his fellow students. He might have been class monitor, but for that. He developed a gift, a talent for literature and music.

    Two years went by. One day, his father said to the son, "You're going to the hospital, son. Mother and I have someone who will donate the ears you need. But it's a secret." The operation was a brilliant success, and a new person turned up. His talents blossomed into genius, and his school and college became a series of success. Later he married and entered the diplomatic service.

    One day ,he urged his father, "Who gave so much for me？I must know! I could never do enough for him." "I do not believe you could, " said the father, "but the agreement was that you are not to know... not yet."

The years kept their secret, but the day did come— one of the darkest days that a son must endure. He stood with his father over his mother's casket (棺材). Slowly, tenderly, the father reached out a hand and raised the thick, reddish-brown hair to show that the mother had no outer ears.

    "Mother said she was glad she never let her hair be cut, " he whispered gently, "and nobody ever thought Mother less beautiful, did they？"

    Real beauty lies not in the physical appearance, but in the heart. Real treasure lies not in what can be seen, but in what cannot be seen. Real love lies not in what is done and known, but in what is done and not known.

Should You Become a Full Stack Web Developer?

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    The human-caused rise in CO₂ hasn't yet reached its full warming effect, owing to the considerable delay in its impact on ocean temperature. There is still another 0.5^oC of so of warming to occur over the coming decades based on the current concentrations（浓度）of CO₂ in the atmosphere, and far more warming beyond that if CO₂ concentrations continue to rise greatly with the business-as-usual burning of fossil oil. To improve the situation, the world needs to shift firmly from coal, oil and gas to renewable energy by around 2050 and from cutting down trees to planting trees and restoring degraded lands.

    So why do human begins keep dashing in a stupid way ahead, toward certain tragedy?

    The main reason is that our political institutions and giant corporations intentionally ignore the rising dangers and damage.   ①    Managing a major company is about maximizing shareholder value, not about telling the truth or avoiding great harm to the planet. Profit -seeking investors own the major media, or at least influence them through their advertising purchases. Thus, a small yet very powerful group keeps the fossil-fuel-based energy system at growing dangers to the rest of humanity today and in the future.

    We need a new kind of politics that starts with a clear goal: environmental safety for the planet's people, by fulfilling the Paris agreement, protecting biodiversity, and cutting pollution, which kills millions each years.   ②    The new politics will listen to scientific and technological experts, not self-interested business leaders and politicians.

       ③    Such a politics is possible. In fact, the public longs for it. A large majority of the American people,for example, want to fight global warming, stay in the Paris climate agreement, and support renewable（可更新的）energy. Yet, as long as a narrow and ignorant elite（精英）judges Americans and the rest of human beings to wander aimlessly in the political desert, the more likely it is that we will end up in a wasteland from which there will be no escape.  ④   

    Before the 1830s most newspapers were sold through annual subscriptions in America, usually $8 to S10 a year. Today $8 or $10 seems a small amount of money, but at that time these amounts were forbidding to most citizens. Accordingly, newspapers were read almost only by rich people in politics or the trades. In addition, most newspapers had little in them that would appeal to a mass audience. They were dull and visually forbidding. But the revolution that was taking place in the 1830s would change all that.

    The trend, then, was toward the "penny paper" ­ a term referring to papers made widely available to the public. It meant any inexpensive newspaper; perhaps more importantly it meant newspapers that could be bought in single copies on the street.

      This development did not take place overnight. It had been possible (but not easy) to buy single copies of newspapers before 1830, but this usually meant the reader had to go down to the printer's office to purchase a copy. Street sales were almost unknown. However, within a few years, street sales of newspapers would be commonplace in eastern cities, At first the price of single copies was seldom a penny ­ usually two or three cents was charged ­ and some of the older well-known papers charged five or six cents. But the phrase "penny paper" caught the public's fancy, and soon there would be papers that did indeed sell for only a penny.

    This new trend of newspapers for "the man on the street" did not begin well. Some of the early ventures were immediate failures. Publishers already in business, people who were owners of successful papers, had little desire to change the tradition. It took a few youthful and daring businessmen to get the ball rolling.