With the development of science and technology, new inventions, especially new electronic products, have made people's lives easy and convenient. But as the saying puts: A coin has two sides.

    One day, I was walking in the park with a friend and his cell phone rang, interrupting our conversation. There we were, walking and talking on a beautiful sunny day and…I became invisible, absent from the conversation.

    The telephone used to connect you to the absent. Now it makes people sitting next to you feel absent. Why is it that the more connected we get, the more disconnected I feel? Every advance in communications technology is a tragedy to the closeness of human interaction. With email and instant messaging over the Internet, we can now communicate without seeing or talking to one another. With voice mail, you can conduct entire conversations without ever reaching anyone. If my mom has a question, I just leave the answer on her machine.

    As almost every contact we can imagine between human beings gets automated, the alienation(疏远) index goes up. You can't even call a person to get the phone number of another person any more. Directory assistance is almost always fully automated.

    Pumping petrol at the station? Why say good morning to the attendant when you can swipe(刷)your credit card at the pump and save yourself the bother of human contact?

    Making a deposit at the bank? Why talk to a teller who might live in the neighborhood when you can just insert your card into ATM?

    Pretty soon you won't have the burden of making eye contact at the grocery shop. Some supermarket chains are using a self-scanner so you can check yourself out, avoiding those check-out people who look at you and ask how you are doing.

    I am not against modern technology. I own a cell phone, an ATM card, a voice mail system, and an email account. Giving them up isn't wise…they're a great help to us. It's some of their possible consequences that make me feel uneasy.

    More and more, I find myself hiding behind e-mail to do a job meant for conversation. Or being relieved that voice mail picked up a call because I didn't really have time to talk. The communications industry devoted to helping me keep in touch is making me lonelier.

    So I've put myself on technology restriction: no instant messaging, with people who live near me，no cell phoning in the presence of friends, no letting the voice mail pick up when I'm at home.

    A complaint was received by the president of a major car company:“This is the fourth time I have written to you , and I don't blame you for not answering me because must sound crazy, but it is a fact that we have a tradition in our family of having ice-cream for dessert after dinner each night. Every night after we've eaten, the family votes on which flavor(味道)of ice-cream we should have and I drive down to the store to get it. I recently purchased a new Pantsmobile from your company and since then my trips to the store have created a problem. You see, every time I buy vanilla(香草)ice-cream my car won't start. If I get any other kind of ice-cream, the car starts just fine. I want you to t now I'm serious about this question , no matter how silly it sounds: What is there about a Pantsmobile that makes it not start when I get vanilla ice-cream, and easy to start whenever I get any other kind?'

    The Pantsmobile company president understandably doubted about the letter, but he sent an engineer there anyway. The engineer had arranged to meet the man just after dinner time, so the two got into the car and drove to the grocery store. The man bought vanilla ice-cream that night and sure enough, after they came back to the car it wouldn't start for several minutes. The engineer returned for three more nights. The first night, the man got chocolate. The car started right away. The second night, he got strawberry and again the car started right up. The third night he bought vanilla and the car failed to start.

    There must be a reason why the man's car wouldn't start when he bought vanilla ice-cream. What was it? After doing more research into the case, the engineer eventually found out. The cause. Vanilla ice-cream was the most popular flavor and was on display in a little case near the express check out, while the other flavors were in the back of the store and took more time to choose and check out. This mattered because the man's car was experiencing vapor(蒸汽) lock, which is excess(过度的)heat boiling the fuel in the fuel line and the resulting air bubbles (气泡) blocking the flow of fuel until the car has enough time to cool. When the car was running, there was enough pressure to move the bubbles along, but not when the car was trying to start.

    Environmentalists said our planet was bound to die. Now one man says they are wrong. “Everyone knows the planet is in bad shape,” thundered a magazine article last year. “Species are being driven to die out at record rates, and the rivers are so poisonous that fish are floating on the surface, dead.”

    But there's growing belief that what everyone takes for granted is wrong: Things are actually getting better. A new book is about to overturn our most basic assumptions about the world's environment. Rivers, seas, rain and the atmosphere are all getting better.

    The total amount of forests in the world is not declining. The Skeptical Environmentalist by Bjorn Lomborg, professor of statistics at the University of Aarhus in Denmark, is an attack on the misleading claims of environmental groups, and the “bad news” culture that makes people believe everything is getting worse.

    Now the attacks are increasingly coming from left-wing environmentalists such as Lomborg, a former member of Greenpeace. The accusation is that, although the environment is improving, green groups — with profits of hundreds of millions of pounds a year — are using scare tactics (战术) to gain donations. Lomborg's book doesn't deny global warming — probably the biggest environmental threat — but destroys almost every other environmental claim with many official statistics.

    The Worldwatch Institute claims that deforestation(采伐森林) has been speeding over the last 30 years. Buy Lomborg says that is simply rubbish. Since the dawn of agriculture the world has lost about 20% of its forest cover, but in recent decades the forest area's depleting has come to a stop. According to UN figures, the area of forests has remained almost steady, at about 30% of total land area, since 1940s. Forests in countries such as the US, UK and Canada have actually been expanding over the past 40 years. Despite all the warnings the Amazon rainforest has only shrunk by about 15%.

    Nor are all our species dying out. Some campaigners claim that 50% of all species will have died out within 50 years. But other studies show only 0.08% of species are dying out each year. Conservation efforts have been successful. Whales are no longer threatened and the bald eagle is off the endangered list.

    Environmental groups claim that many of the improvements are the results of their campaigns. Stephen Tindale, director of Greenpeace UK, said, “There are important examples, such as acid rain and ozone, where things weren't as bad as predicted, and that's because our behavior changed.”

    Exercise could not only benefit your body, but also imp rove your memory, researchers found recently. In their paper published on Monday, researchers from the University of California, Irvine in the United States and the University of Tsukuba in Japan introduced their experiment and conclusion.

    Scientists invited 36 volunteers who were in their early 20s to do 10 minutes of light exercise before taking a memory test in which they were shown pictures like broccoli(西兰花)or picnic baskets and asked to recall them later. The same experiment was repeated with the same group of volunteers without exercising. "The memory task was really quite challenging ,said Michael Yassa, co-author of the study and a neuroscientist (神经科学家)at the University of California, Irvine. "We used very tricky similar items to see if they would remember whether it was this exact picnic basket versus (对抗)that picnic basket. "

    Researchers also scanned brains of some of the participants during the experiment. They found strengthened communication between regions involved in the storage and recollection of memories in brains of those who had exercised. This suggested that just 10 minutes of light exercise like walking, yoga or Tai Chi might increase memory power.

    As all the volunteers in the experiment were relatively young, researchers are still working to look at the effects of light exercise on older people. " Our future goal is to try to develop an exercise prescription (处方)that can be used by older adults who might have disabilities or mobility impairments, but can still adopt very simple exercise rules of life and be able to, perhaps, delay cognitive decline temporarily," said Yassa.

    On the very first day, God created the cow and said to him, "As a cow, you must go to the field, working under the sun all day long! And I will give you 40 years to live." The cow objected, "What? You want me to live such a tough life for 40 years? Let me have 20 years, and I'll give the rest back to you." So God agreed.

    On the second day, God created the dog and said, "You'll be man's best friend, guarding his house and eating his leftovers. I'll give you a life span of 30 years." The dog shook his head. "Eating leftovers for 30 years? No way! I'll give half back to you!" So God agreed.

    Then, God created the monkey, saying, "Your job is to entertain people. You've got to do monkey tricks and make them laugh. And you'll live 20 years."" Do monkey tricks to make them laugh? 10 years will do." the monkey said. So God agreed.

    Finally, God created the man. "You will be the man. All you need to do is to sleep, eat, and play, simply enjoying your life. And I'll give you 20 years to live." Thinking for a while, the man replied, "I can be the man, but I want to take all the years that the cow, the dog and the monkey didn't want." So God agreed.

    Since then, man eats, sleeps and plays in the first 2 decades, marries and spends the next 2 decades like a cow, working very hard to support his family. Then when he has children, he lives 15 years like a dog, taking care of the house and eating whatever is given to him. And when he is old, he retires and lives 10 years like a monkey, doing tricks to amuse his grandchildren.

Animals are humans' best friends. Here we will know about some of those interesting friends.
       Gouldian Finch

Native to Australia, the Gouldian finch has special green, yellow, red and black markings. For the males (雄性), the part between the neck and the stomach is bright purple, while for females, this part is pale purple. We all Have to agree that nature has created some really great animals with the smallest of details.

Keel-Billed Toucan

It is the very same crazy bird from the movie Rio, also known to be the "rainbow billed toucan". The bird has a black body and a yellow face. The color of its bill (喙) is a combination of green, yellow, orange and red, and that's how the name rainbow billed toucan came from. It is rarely seen alone. It travels in small groups of about six to twelve individuals.

The Oriental Dwarf Kingfisher

It is a great tiny bird commonly found in South Asia. This bird is the most brightly colored and the smallest kingfisher species. Its special feature is the orange with bluish-purple head, which can be easily recognized. The throat is white with bright orange colored lines at the bottom. It is a pretty and small bird.

Poison (毒) Dart Frog

It is a kind of very beautiful creature. The bright colors of the poison dart frog send a warning to its natural enemies about its poison. Found in South America, with some of the brightest shades of yellow, copper, red, green and blue, this frog is among those very animals that you have to watch out in the Amazon Rainforest.