A new study suggests that washing dishes by hand is healthier than using a dishwasher.

    Nobody likes doing the dishes, but it turns out that doing this task might pay off in an unexpected way. According to a new study published in the Journal of Pediatrics, washing dishes by hand instead of using a dishwasher might prevent the development of allergies (过敏).

    Researchers in Sweden surveyed the parents of 1,029 children aged 7 and 8. They discovered that children whose families hand-washed the dishes instead of using a machine were less likely to have allergies.

    Earlier research has shown that dishes washed by machine are cleaner than those washed by hand. So why would kids who eat with slightly dirtier plates be better when it comes to preventing allergies? One explanation is based on a theory known as the “hygiene hypothesis,” which says the reason why kids develop allergies is that their environment is actually too clean. Your immune system keeps you healthy by fighting germs like viruses and bacteria. But when you have allergies, it overreacts and tries to fight ordinary things like pollen(花粉) or certain foods.

    Being exposed to germs, especially early in life is good training for the immune system, says the lead author of the study, Dr. Bill Hesselmar of Queen Silvia Hospital in Sweden. “You stimulate the immune system in various ways and it becomes tolerant.”

    This study shows that while using the dishwasher might be easier, the old-fashioned method of cleaning up could be better for your health.

    A couple of days ago, as the test results came out, my son and a group of his 13-year-old friends piled into the back seat of my car, ready for the last-day-of-school party at McDonald's. “Jack got a laptop for getting straight A's, and Laurie got a cell-phone,” one boy said. “Oh, yeah, and Sarah got an iPad, and she's only in third grade,” said another. “And how about Brian? He got $10 for each A.”

    I suddenly became concerned. These payoffs might get parents through grammar school, but what about high school and beyond? What would be left after the electric guitar, the cell-phone, and the DVD player?

    I saw the road ahead:As the homework load increased, my income would decrease.I saw my comfortable lifestyle disappear before my eyes — no more of those $5 bags of already-peeled organic carrots. No more organic anything!

    I started to feel surprised and nervous. Would every goal achieved by my two children fetch a reward? A high grade point average? A good class ranking? Would sports achievements be included in this reward system: soccer goals, touchdowns? What about the orchestra? Would first chair pay more than second? I'd be penniless by eighth-grade graduation.

    “We never paid anything for good grades,” said my neighbor across the street, whose son was recently accepted at MIT. “He just did it on his own. Maybe once in a while we went out for pizza, but that's about it.”

    Don't you just hate that? We're all running around looking for the MP3 player with the most updates, and she's spending a few dollars on pizza. She gets motivation; we get negotiation. And what about the primary grades? What do these students get? “When the teacher asked if anyone got rewards for good grades, everyone in my class raised their hands and said they got ice cream cones ,” said one third-grader.

    If you are a recent social science graduate who has had to listen to jokes about unemployment from your computer major classmates, you may have had the last laugh. There are many advantages for the social science major because this high-tech "Information Age" demands people who are flexible (灵活) and who have good communication skills.

    There are many social science majors in large companies who fill important positions. For example, a number of research studies found that social science majors had achieved greater managerial success than those who had technical training or pre-professional courses. Studies show that social science majors are most suited for change, which is the leading feature (特点) of the kind of high-speed, high-pressure, high-tech world we now live in.

    Social science majors are not only experiencing success in their long term company jobs, but they are also finding jobs more easily. A study showed that many companies had filled a large percentage of their entry level positions with social science graduates. The study also showed that the most sought-after quality in a person who was looking for a job was communication skills, noted as "very important" by 92 percent of the companies. Social science majors have these skills, often without knowing how important they are. It is probably due to these skills that they have been offered a wide variety of positions.

    Finally, although some social science majors may still find it more difficult than their technically trained classmates to land the first job, recent graduates report that they don't regret their choice of study.

    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,”

    Nola (August 21, 1974-November 22, 2015)was a northern white rhino(犀牛) who lived at the San Diego Zoo Safari Park near Escondido, California. At her death, she was one of only four remaining northern white rhinos in the world. The other three lived in Kenya. World Rhino Day, held on September 2, is to raise awareness(意识) of the less than 30, 000 other rhinos left on Earth.

    "Rhinos need our help today, not tomorrow," Nola's lead keeper Jane Kennedy said. "Last year we lost over 1, 200 rhinos just in South Africa. If we continue to lose more than 1, 000 rhinos a year, in 10 to 20years all the rhinos on the planet will be gone. "

    "Unfortunately, most animals are in danger of dying out because of humans," Kennedy says. "Humans have either poached animals, or because there are over seven billion of us, we've taken up too much of the world's resources". Poachers illegally hunt rhinos for their horns. They sell the horns for thousands of dollars per pound, to be used for art, jewelry, and decorations. Experts believe that one rhino is poached every eight hours.

    In 1975, the San Diego Zoo Institute for Conservation Research started the Frozen Zoo, a program through which researchers have collected cell (细胞) samples from more than 8, 000 different types of animals, including the northern white rhino. Scientists hope that by studying the rhino cells, they will get greater understanding of it, and will find ways to increase its numbers.

    Jane Kennedy describes World Rhino Day as "a celebration of rhinos along with an awareness campaign(活动)for everybody across the world to know that rhinos need our help. "At the San Diego Zoo, children and adults are welcome to visit and speak with zookeepers to learn about rhinos. But you don't have to live in San Diego to celebrate World Rhino Day. It is observed around the world, with zoos and wildlife parks holding special events and programs to teach people about rhinos, and enable them to see the animals up close. For more information, go to www. worldrhinoday.org.

    When I was small and my grandmother died, I couldn't understand why I had no tears. But that night when my dad tried to cheer me up, my laugh turned into crying.

    So it came as no surprise to learn that researchers believe crying and laughing come from the same part of the brain. Just as laughing has many health advantages, scientists are discovering that so, too, does crying.

    Whatever it takes for us to reduce pressure is important to our emotional health, and crying seems to work well. One study found that 85 percent of women and 73 percent of men report feeling better after crying.

    Besides, tears attract help from other people. Researchers agree that when we cry, people around us become kinder and friendlier and they are more ready to provide support and comfort. Tears also enable us to understand our emotions better; sometimes we don't even know we're very sad until we cry. We learn about our emotions through crying, and then we can deal with them.

    Just as crying can be healthy, not crying - holding back tears of anger, pain or suffering - can be bad for physical health, Studies have shown that too much control of emotions can lead to high blood pressure, heart problems and some other illnesses. If you have a health problem, doctors will certainly not ask you to cry. But when you feel like crying, don't fight it. It's a natural –and healthy-emotional response.