One afternoon last week, I saw three tearful children from my son's school being comforted by teachers. That morning, my 11-year-old had stomach pains, retching(干呕)into a bowl. Talking to other mothers later, I heard about other children with stomachache or difficulty sleeping the night before.

What caused so much pain? Sports day. Sports day might be necessary at a highly-competitive independent school, but not at a village primary school. For the children who can fly like the wind, sports day causes no problem. For those who are overweight or just not good at sport, it is a nightmare(噩梦). Even for those who enjoy running but fall halfway down the track in front of the entire school and their parents, it can prove a disaster.

    Why do we put our children through this annual suffering? Some may say competition is character building; or it's taking part, not winning, that's important; or that it is a tradition of school life. I just felt great pity for those children in tears or in pain.

    Team games at the end of sports day produced some close races, wild enthusiasm, lots of shouting—and were fun to watch. More importantly, the children who were not so fast or quick at passing the ball were hidden a little from everyone's eyes. Some of them also had the thrill of being on the winning side.

    I wish that sports day could be abandoned and replaced with some other less-competitive event. Perhaps an afternoon of team games, with a few races for those who want them, would be less stressful for the children and a lot more fun to watch.

    It's generally believed that people act the way they do because of their personalities and attitudes.They recycle their garbage because they care about the environment.They pay $5 for a caramel brulee latte because they like expensive coffee drinks.

    It's undeniable that behavior comes from our inner dispositions（性情）,but in many instances we also draw inferences about who we are,as suggested by the social psychologist Daryl Bern,by observing our own behavior.We can be strangers to ourselves.If we knew our own minds,why would we need to guess what our preferences are from our behavior?If our minds were an open book,we would know exactly how much we care about the environment or like lattes.Actually,we often need to look to our behavior to figure out who we are.

    Moreover,we don't just use our behavior to learn about our particular types of character—we infer characters that weren't there before.Our behavior is often shaped by little pressures around us,which we fail to recognize.Maybe we recycle because our wives and neighbors would disapprove if we didn't.Maybe we buy lattes in order to impress the people around us.We should not mistakenly believe that we always behave as a result of some inner disposition.

    Whatever pressures there can be or inferences one can make,people become what they do,though it may not be in compliance（符合）with their true desires.Therefore,we should all bear in mind Kurt Vonnegut's advice:"We are what we pretend to be,so we must be careful about what we pretend to be."

    “Years ago when I was at the Grand Canyon, I remembered someone coming up to the canyon's edge, taking a shot with a camera and then walking away, like 'got it – done', barely even glancing at the magnificent scene in front of him,” Linda Henkel, a scientist at Fairfield University, US told Live Science.

    Henkel was surprised by how obsessed (痴迷的) people are with taking pictures these days - before dinner, during friends' birthday parties, on museum tours and so on.

    They keep taking pictures because they think that it helps record the moment, but as Henkel's latest study has just found out, this obsession may prevent their brains remembering what actually happened, reported The Guardian.

    In her study, Henkel led a group of college students around a museum and asked them to simply observe 15 objects and photograph 15 others. The next day the students' memory of the tour was tested, and the results showed that they were less accurate in recognizing the objects and they remembered fewer details about them if they photographed them.

    ''When people rely on technology to remember them — counting on the camera to record the event and thus not needing to attend to it fully themselves, it can have a negative impact on how well they remember their experiences,” Henkel explained.

    But there is also an exception: if students zoomed in to photograph part of an object, their memory actually improved, and those who focused the lens (镜头) on a specific area could even recall parts that weren't in the frame.

    So basically, this study is saying that constantly taking pictures can harm your memory. But shouldn't reviewing pictures we have taken help wake up our memories? This is true, but only if we spend enough time doing it.

    “In order to remember, we have to access and interact with the photos, rather than just collect them,” Henkel told The Telegraph. However, previous research has shown that most people never take the time to look over their digital pictures simply because there are too many of them and they aren't usually very organized on their computers.

    Trees are useful to man in three important ways: they give him wood and other useful things, they give him cool places, and they help to stop drought and flood.

    Unluckily, in many parts of the world, man has not found that the third of these points is the most important. Man wants to make money from trees, so he has cut them down in large numbers, only to find that without them he has lost the best friends he had. And also, he is usually too careless to plant and look after new trees. So the forests slowly disappear.

    This does not only mean that man will have fewer trees. The results are even worse: for where there are trees, their roots break up soil-make the rain in-and also bind the soil, thus stopping it from being washed away easily; but where there are no trees, the rain falls on hard ground and flows away, causing floods and carrying away the rich top-soil. When all the top-soil is gone, nothing is left but useless desert.

    It is the ideal way for traveler to ensure they wake up with the perfect view — a portable Eco-capsule that can be set up anywhere in the world. The egg-shaped pod (独立舱) ensures travelers can camp in the most extreme corners with all the luxury of a hotel room.

    Looking like something in a sci-fi movie, the pod is equipped with solar panels, which guarantee solar energy as its power. In this way the tiny home can let you live comfortably wherever you travel. It even has its own shower and toilet, sleeping area for two, and a small kitchen. The 3,306 ib pods can be transported in a sea-container, meaning the possibilities are endless.

    Bratislava-based Nice Architects are behind the extraordinary Eco-capsules and said they initially designed them for people who stay in the nature for a long time. However, it quickly became apparent that they could be opened up to the wider public and even used in urban areas to fight against high rent and placed on roofs for studio space or living quarters. The Eco-capsule can serve as a cottage, a pop-up hotel or even as a charging station for electric cars.

The Eco-capsules could even be quickly imported for housing for emergency teams who have been quickly arranged to help with natural disasters. Described by the website as a "Swiss Army knife" — it packs everything you need, the self-contained unit can sustain long periods of time without external resources.

    The 86 sqft pods are able to sleep two people for up to year and for those worried about a cold night's sleep, the Eco-capsule has a thick layer which significantly reduce heat loss.

    The pod is designed to cope with extreme weather conditions due to its innovative (创新的) design and materials used. No wonder the Nice Architects are so confident about its future and the producers are receiving heavy orders.

Rachel Carson was a science writer widely respected for her books about oceans.But she also devoted years to gathering scientific research that would awaken the public to the dangers of modern chemical pesticides.Her work,Silent Spring,became one of the most influential books of the 20th century.And it launched the modern environmental movement.

Born in Pennsylvania,she became a marine scientist working for the US government,primarily as a writer and editor.Her first three books,Under the Sea-Wind,The Sea Around Us,and The Edge of the Sea were physical explanation of life in and near the sea.They made Carson one of the best-known and respected science writers.But then she turned her time and talents to a new subject.

Carson had been concerned about the dangers of the pesticide DDT since the mid-1940s.At first DDT was a symbol of the progress of modern chemistry.It had saved countless lives by killing lice and mosquitoes that spread deadly diseases.But Carson doubted whether spreading large quantities of poison throughout the environment could be completely safe.She painstakingly gathered research to prove that the chemical industry was overconfident about the safety of chemicals that hadn't been tested.

Carson published her research as a book,Silent Spring,in 1962.It caused an uproar.Carson was immediately attacked by the chemical industry.Millions of citizens tuned in to watch a television program analyzing the issue.Carson's calm and reasoned arguments turned the audience in her favor.Finally,her work convinced the president to call for an investigation.Eventually 12 of the most toxic chemicals Carson wrote about in Silent Spring,including DDT,were banned or cancelled.She grew physically weak and endured a lot of pain.Yet she refused to stop working on the book.She died on April 14,1964,at the age of 56.Her writings helped move the nation toward a new understanding of how humankind depends on the interconnection of all forms of life on Earth.