Most of us have gone away from “mad men” in the street, only to realize that they are in fact using a Bluetooth headset. Now a new University of Pennsylvania study shows that muttering can actually help people find lost objects—in other words, saying the name of an object helps you find it more quickly.

    Previous work has suggested that speaking aloud while performing step-by-step tasks, like tying shoelaces (鞋带), can help kids guide their behavior and let them focus on the job in hand. However, scientists were not sure if speaking aloud when performing tasks could help adults in the same way, especially when looking for particular objects. Professor Gary Lupan and Daniel Swingley, writing for the Quarterly Journal of Experimental Psychology, carried out some experiments. They hoped to give the fact that next time you lose your keys, muttering “keys, keys, keys” can in fact help you find them.

    Inspired by viewing people muttering to themselves as they try to find things like peanut butter in a supermarket, the researchers conducted two experiments to see if this actually worked. In the first, participants were shown 20 pictures of various objects and were asked to find a certain one, with some seeing a text label (标签) telling them what they were looking for. These participants were then asked to search for the object again while saying the word to themselves, with results showing that saying it aloud helped people find the object more quickly.

    The second experiment saw participants performing a shopping task, where they were shown photographs of items (物品) commonly found on supermarket shelves. They were asked to find all examples of a particular item, so if they were asked for apples they had to find all the bags of apples, as quickly as possible. The researchers found that there was also an advantage in saying the name of the product aloud when they were searching for something familiar.

    The University of Pennsylvania study shows that muttering can actually help people reach the target object—in other words, muttering to oneself helps to focus the mind on something. It works more effectively than seeing a written description. Repeating the word over and over again helps even more.

    If humans were truly at home under the light of the moon and stars，we would go in darkness happily，the midnight world as visible to us as it is to the vast number of nocturnal(夜间活动的) species on this planet. Instead，we are diurnal creatures, with eyes adapted to living in the sun's light. This is a basic evolutionary fact, even though most of us don't think of ourselves as diurnal beings. Yet it's the only way to explain what we've done to the night: We've engineered it to  receive us by filling it with light.

    The benefits of this kind of engineering come with consequences 一 called light pollution 一 whose effects scientists are only now beginning to study. Light pollution is largely the result of bad  lighting design，which allows artificial light to shine outward and upward into the sky. III-designed lighting washes out the darkness of night and completely changes the light levels 一 and light  rhythms — to which many forms of life, including, ourselves, have adapted. Wherever human light spills into the natural world, some aspect or life is affected .

    In most cities the sky looks as though it has been emptied of stars, leaving behind a vacant haze(霾) that mirrors our fear of the dark. We've grown so used to this orange haze that the original glory of an unlit nigh, - dark enough for the planet Venus to throw shadow on Earth, is wholly beyond our experience, beyond memory almost.

    We^'ve lit up the night as if it were an unoccupied country, when nothing could be further form the truth. Among mammals alone, the number of nocturnal species is astonishing, Light is a powerful biological force, and on many species it acts as a magnet(磁铁). The effect is so powerful that scientists speak of songbirds and seabirds being “captured” by searchlights on land or by the light from gas flares on marine oil platforms. Migrating at night, birds tend to collide with brightly lit tall buildings.

    Frogs living near brightly lit highways suffer nocturnal light levels that are as much as a million times righter than normal, throwing nearly every aspect of their behavior out of joint including most other creatures ,we do need darkness .Darkness is as essential to our biological welfare, to our internal clockwork, as light itself.

    Living in a glare of our making,we have cut ourselves off from our evolutionary and cultural heritage—the light of the stars and the rhythms of day and night .In a very real sense light pollution causes us to lose sight of our true place in the universe, to forget the scale of our being, which is best measured against the dimensions of a deep night with the Milky Way—the edge of our galaxy arching overhead.

    "Do you have any idea how hard it is to be a kid?"My 7-year-old daughter once asked me.My initial reaction to her complaint was eye-rolling,along with thinking,“Being a kid is hard?Are you kidding me?”as I mentally ticked off（用记号勾出）all the hard things that her mama does.

    However,as I thought about it a bit more,I realized how silly my reaction had been.Yes,as we adults look back on our childhood,being a kid seems carefree and easy and full of fun.Coloring at school!Playing games!Riding bikes! How could that be hard?So I asked my daughter why being a kid was so hard.

    Her first answer didn't surprise me."Well,because you don't have your own phone,and you can't eat in the living room."

    I asked if anything else was hard about being a kid."Someone else is the boss of you,"she replied.

    I thought some more.What else is hard about being a kid?Well,sometimes,we don't really take kids seriously.

    There are times when I've responded to my children's tears with "It's not that bad,"or"You don't need to be upset about that."Because I believe that a cancelled playdate or a lost toy is no big deal.But for little ones,it is.

    We don't intentionally ignore these opportunities for connection,but sometimes,in busy moments of parenting, we respond unskillfully.We don't take our children's view,and we miss an opportunity to practice compassion（同情心）.

    Max Vernon Mathews has been called the father of computer music. He created electronic tools so that people could use computers as musical instruments. He had a huge influence on the development of electronic music and how it is written, recorded and played.

    In 1957, Max Mathews wrote the first computer program that enabled a computer to create sound and play it back. At the time, he was working as an engineer at Bell Laboratories in New Jersey. His computer program was called Music. It enabled a large IBM computer to play a seventeen-second piece of music that he had written.

    The computer was so slow that it would have taken an hour to play the piece of music in seventeen seconds. For that reason, Mathews moved the work to a tape player, which could be sped up to play the music at a normal speed. He later said that the sound quality of the music notes was not great, but the technical importance of the music was huge.

    The science fiction writer Arthur C. Clarke visited Bell Laboratories in the 1960s. He heard a computer “sing” the song "Daisy Bell" on devices and programs developed by Max Mathews andother engineers. Clarke noted this technology in his book “2001: A Space Odyssey,” which was later made into a movie.

    Mathews continued creating other versions of the Music program. He became interested in how computers could help musicians outside recording studios.

    Max Mathews had a long and productive career. He worked with composers like John Cage and Edgard Varese. He helped create a center for research in computer music in Paris. And he taught at the Center for Computer Research in Music and Acoustics in Stanford University in California.

    Mathews believed modern musicians were not making full use of the power of computer music. He said a violin always sounds like a violin, but with a computer, the way a violin sounds is unlimited. He said he did not want computer sounds to replace live music. But he said he hoped laptop computers would one day be considered serious instruments

    I love charity(慈善) shops and so do lots of other people in Britain because you find quite a few of them on every high street. The charity shop is a British institution, selling everything from clothes to electric goods, all at very good prices. You can get things you won't find in the shops anymore. The thing I like best about them is that your money is going to a good cause and not into the pockets of profit-driven companies, and you are not damaging the planet, but finding a new home for unwanted goods.

    The first charity shop was opened in 1947 by Oxfam. The famous charity's appeal to aid postwar Greece had been so successful it had been flooded with donations(捐赠物). They decided to set up a shop to sell some of these donations to raise money for that appeal. Now there are over 7,000 charity shops in the UK. My favourite charity shop in my hometown is the Red Cross shop, where I always find children's books, all 10 or 20 pence each.

    Most of the people working in the charity shops are volunteers, although there is often a manager who gets paid. Over 90% of the goods in the charity shops are donated by the public. Every morning you see bags of unwanted items outside the front of shops, although they don't encourage this, rather ask people to bring things in when the shop is open.

    The shops have very low running costs: all profits go to charity work. Charity shops raise more than ￡110 million a year, funding(资助) medical research, overseas aid, supporting sick and poor children, homeless and disabled people, and much more. What better place to spend your money? You get something special for a very good price and a good moral sense. You provide funds to a good cause and tread lightly on the environment.

The Handshake

    I don't remember the exact date I met Marty for the first time. Like a lot of people who want to get through a checkout line, I found my thoughts on speed, nothing more. The line I was standing in wasn't moving as quickly as I wanted, and I glanced toward the cashier, who was receiving money from customers.

    He was an old man in his sixties. I thought, well, it probably took him a little longer to get the jobs done. For the next few minutes I watched him. He greeted every customer before he began scanning the goods they were purchasing. Sure, his words were the usual, “How's it going?” But he did something different—he actually listened to people. Then he would respond to what they had said and talk with them briefly.

    I thought it was strange, but I guessed I had grown accustomed to people asking me how I was doing simply out of a conversation without thinking. Usually, after a while, you don't give any thought to the question and just say something back quietly.

    This old cashier seemed sincere about wanting to know how people were feeling. Meanwhile, the high-tech cash register rang up their purchases and he announced what they owed. When customers handed money to him, he pushed the appropriate keys, the cash drawer popped open, and he counted out their change.

    Then magic happened.

    He placed the change in his left hand, walked around the counter to the customers, and extended his right hand in an act of friendship. As their hands met, the old cashier looked the customers in the eyes. “I want to thank you for shopping here today,” he told them. “You have a great day. Bye-bye.” The looks on the faces of the customers were priceless.

    Now it was my turn. I glanced down at the name tag on his red waistcoat, the kind experienced Wal-Mart cashier wore. It read, “Marty.”

    Marty told me how much I owed and I handed him some money. The next thing I knew he was standing beside me, offering his right hand and holding my change in his left hand. His kind eyes locked onto mine. Smiling, and with a firm handshake…