Phrases like “tiger mom" and "helicopter parent” have made their way into everyday language. Many of us find ourselves drawn to the idea that with just a bit more parental hard work and effort, we might turn out children with bright futures. But is there anything wrong with a kind of“over parenting style”?

    Parental involvement has a long history of being studied. Many of the studies, conducted by Diana Baumrind, a famous psychologist at the University of California, Berkeley, have found that a good parent is the one who is involved and reacts to her child in a positive way, who sets high expectations but gives her child independence. These “authoritative parents”appear to hit the sweet spot of parental involvement and generally raise children who do better academically, psychologically and socially than children whose parents are not strict and less involved, or controlling and more involved. Why is this parenting style so successful?

    Authoritative parents actually help improve motivation in their children. Carol Dweck, a social psychologist at Stanford University, has done research that indicates why authoritative parents raise more motivated children. In a typical experiment, Dr. Dweck takes young children into a room and asks them to solve a simple puzzle. Most do so with little difficulty. Butthen Dr. Dweck tells some, but not all, of the kids how clever they are. As it turns out, the children who are not told they're smart are more motivated to solve increasingly difficult puzzles. They also show higher levels of confidence and show greater progress in puzzle-solving.

    As the experiment suggests, praising children's talents and abilities seems to shake their confidence. Dealing with more difficult puzzles carries the risk of losing one's status as “smart”. Dr. Dweck's work strongly supports that of Dr. Baumrind, who also found that reasonably supporting a child's independence and limiting interference (干涉) causes better academic and emotional results.

    The central task of growing up is to develop a sense of self that is independent and confident. If you treat your young child who is just learning to walk as if she can't walk, you reduce her confidence. Allowing children to make mistakes is one of the greatest challenges of parenting. It is easier when they are young. The potential mistakes carry greater risks, and part of being a parent is reducing risk for our children.

    At 17, Mark Merwitzer might be Florida's youngest lobbyist (游说者). The Miami high school junior appeals to authorities to keep drivers from texting behind the wheel.

    Over the past year, the teen has met with county officials and state legislators (立法者)to argue that the police should be able to pull drivers over just for using their phones. Efforts in past years have struggled to advance, but recently, the bill got full support from the Senate Transportation Committee (参议院交通委员会).

    Like many US people, Merwitzer has seen countless drivers texting behind the wheel. But last spring, while he was riding in the passenger seat of a vehicle, he saw drivers using smartphones in almost every car. A few drivers even appeared to lose control of their cars as they sped along. It dawned on (突然想到) Merwitzer that no one was doing anything to fix the problem.

    We need to teach drivers how to properly and safely use technology behind the wheel which is not using it at all,” said Merwitzer.

    For the 17-year-old teenager, advocating a new state law has been a crazy experience.

    In order to carry out his plan，he put his focus on drumming up (争取)local support by starting an online petition (请愿)and speaking to village councils,

    Merwitzer said the first time he spoke at a council meeting “was a complete stutter fest (口吃表演)，” but he quickly adapted to it.

    “It really creates some standards that help everybody realize the importance of keeping their eyes on the road,” said Miami-Dade Commissioner (专员)Levine Cava.

The commissioner has been so impressed with Merwitzer's understanding of the political process. “He really learned very quickly how to be an effective citizen lobbyist,” she said.

    So far, opposition to the bill has come mainly from police departments. Some are worried about the possibility of lawsuits (诉讼)if officers are accused of racially profiling (按种族形象定性) drivers when accusing them of texting and driving，Merwitzer said. The bill also has critics in the House, where lawmakers have yet to make plans for a hearing.

    Merwitzer said he would one day like to be a state legislator, but in the meantime he has a few short-term goals, like finishing school and going to college. Once the legislative session (期间) is over, Merwitzer plans to turn his attention to another local problem: public transportation. “I'd like to focus on that，” Merwitzer said. “It seems like it's a giant mess,”

    A new study warns that about thirty percent of the world's people may not have enough water by the year 2025.

    A private American organization called Population Action International did the new study. It says more than 335 million people lack enough water now. The people live in 28 countries. Most of the countries are in Africa or the Middle East.

    P-A-I researcher Robert Engelman says by the year 2025, about 3,000 million people may lack water. At least 18 more countries are expected to have severe water problems. The demand for water keeps increasing. Yet the amount of water on the earth stays the same.

    Mr. Engelman says the population in countries that lack water is growing faster than in other parts of the world. He says population growth in these countries will continue to increase.

    The report says lack of water in the future may result in several problems. It may increase health problems. Lack of water often means drinking water is not safe. Mr Engelman says there are problems all over the world because of diseases, such as cholera, which are carried in water. Lack of water may also result in more international conflict. Countries may have to compete for water in the future. Some countries now get sixty percent of their fresh water from other countries. This is true of Egypt, the Netherlands, Cambodia, Syria, Sudan, and Iraq. And the report says lack of water would affect the ability of developing to improve their economies. This is because new industries often need a large amount of water when they are beginning.

    The Population Action International study gives several solutions to the water problem. One way, it says, is to find ways to use water for more than one purpose. Another way is to teach people to be careful not to waste water. A third way is to use less water of agriculture.

    The report also says long-term solutions to the water problem must include controls on population growth. It says countries cannot provide clean water unless they slow population growth by limiting the number of children people have.

    Think plants are just boring green things that you use for food and decoration? Think again! Plants are able to do some pretty awesome things that you're probably totally unaware of.

    Researchers have discovered that plants have the ability to communicate with an underground network made up of fungus (真菌) , which serves the plants in many ways. Tomato plants use the fungus web to warn each other of their own unhealthy conditions. Trees connected through the fungus network could move nutrients (养分) to and from each other. It is believed that larger trees move nutrients to smaller ones to help them to survive.

    Not only that, but they can also damage unwelcome plants by spreading poisonous chemicals through the fungus. It sounds like the plant world had the Internet before we did.

    Some plants have a rather impressive line of defense against being eaten. When sensing they are being swallowed, they give off a chemical into the air that attracts the insect's natural enemy. The enemy attacks the bug, thus saving the plants. This is basically the plant kingdom version of getting your older brother to beat up that kid who steals your lunch money.

    You might be aware that humans and animals have an internal clock. But did you know that plants also have this clock? This means they can prepare for certain times of day just like we do. Is it because they can react to light at sunrise? In a study, scientists found that plants use the sugars they produce to keep time, which help to regulate the genes responsible for the plant's own internal clock. So, in a sense, wake up with petunias (矮牵牛) is just as valid as ―wake up with the chickens.

    Nature is full of surprises. So for those of you who didn't know the wonders of plants, now you do.

    Triple Olympic and world sprint(短跑) champion Usain Bolt of Jamaica said on Monday he expects years of fast feats to ease doping doubts in athletics and has no plans to play American football.

    Appearing on ESPN programs and in light-hearted races outside the television sport network's studios, Bolt said he feels he must prove himself to a skeptical sports world in the wake of past doping scandals(诽谤).

    "I have to prove myself to the world that you can run fast without it," Bolt said.

    Bolt cited the speeds he and countryman Asafa Powell and American Tyson Gay have achieved without positive doping tests.

    "We just (have to) continue to run fast," Bolt said. "In a couple of years everyone will continue to watch again and have less doubts."

    Bolt won gold in the 100m, 200 and 4x100 relay in world record times at last year's Beijing Olympics and last month in Berlin set world records of 9.58 seconds in the 100 and 19.19 in the 200 and helped a relay title in a World Championships treble.

    "I want to be a legend in the sport. For me it's all a focus on winning championships after championships," Bolt said.

    "I don't consider myself a legend. When I defend my titles I will consider myself a legend."

    Bolt's defending of World and Olympic gold should be the feature attraction of the 2011 IAAF World Championships in Daegu, South Korea, and the 2012 London Olympics.

The age of technology is a great and convenient thing, but it does have effects on us in many different ways.

It causes long-term memory loss. Thanks to Baidu, we don't really have to remember much of anything. Questions are answered at the drop of a hat because Baidu is all-knowing! Is that a good thing, though? People aren't digging through their brains anymore to find answers. Here's the good news: we can still exercise our long-term memory by simply thinking before we Baidu. If we don't want to go down that road, we can search Baidu for some memory games to play. Turn Baidu into an asset instead of an enemy.

It makes us lack patience. Baidu gives us what we want. Everything is instant. In fact, if we have to wait for even a handful of minutes for anything, we start losing our minds. This idea of instant satisfaction carries through to many other aspects of our lives, too, like when we go out to eat, drive in traffic, or even deal with workplace accidents. Instead of using Baidu to lessen our anger, try searching for some mindful meditations (沉思).Focus on our breath and realize everything doesn't have to move at lightening speed. We can actually listen to some peaceful spa or meditation music on our Pandora, too!

It wastes our time. Be honest, how much time are we spending on Baidu every day? Whether we're doing research for our own personal needs, buying clothing, or writing a research paper, we all spend a ton of time on the trusty Internet. Are we always being efficient with this time? For the sake of our precious time, if we haven't used Baidu Drive, we should. Keep spreadsheets, text does, PDFs, slideshows, and even recordings exactly where we can easily find them. Keep a running list of websites we know we'll revisit.

Overall, things are different these days. Yes, there are noticeable negative side effects because of the Baidu invasion, but we don't have to fall into that trap. Stay sharp and don't let ourselves become imprisoned doing the Baidu god's bidding.