A team of engineers at Harvard University has been inspired by Nature to create the first robotic fly. The mechanical fly has become a platform for a series of new high-tech systems. Designed to do what a fly does naturally, the tiny machine is the size of a fat housefly. Its mini wings allow it to stay in the air and perform controlled flight tasks.

    “It's extremely important for us to think about this as a whole system and not just the sum of a bunch of individual components,” said Robert Wood, the Harvard engineering professor who has been working on the robotic fly project for over a decade. A few years ago, his team got the go-ahead to start piecing the components together. “The added difficulty with a project like this is that actually none of those components are off the shelf and so we have to develop them all on our own,” he said.

    They engineered a series of systems to start and drive the robotic fly. “The seemingly simple system which just moves the wings has a number of interdependencies on the individual components, each of which individually has to perform well, and then has to be matched well to everything it's connected to,” said Wood. The flight device was built into a set of power, computation, sensing and control systems. Wood says the success of the project proves that the flying robot with these tiny components can be built and manufactured.

    Wood says the design offers a new way to study flight mechanics and control at insect-scale. Yet, the power, sensing and computation technologies on board could have much broader applications. “You can start thinking about using them to answer open scientific questions, you know, to study biology in ways that would be difficult with the animals, but using these robots instead,” he said. “So there are a lot of technologies and open interesting scientific questions that are really what drives us on a day to day basis.”

    How does a sunset work? We love to look at one, but Jolanda Blackwell wanted her eighth-graders to really think about it and question.

    So Blackwell had her students watch a video of a sunset as part of a physics lesson on motion. "I asked them: ' So what's moving And why' " Blackwell says. Some thought the sun was moving; others knew that a sunset is the result of the Earth spinning around on its axis. "Usually, my biggest challenge is trying to keep them patient," she says. "They just have so many burning questions."

    "Every day, we meet new information," says Charan Ranganath, a psychologist. Ranganath was curious to know why we keep some information and forget other things. So he got 19 volunteers and asked them to review more than 100 questions. When the participants' curiosity was aroused, the parts of' their brains that regulate pleasure and reward lit up. Curious minds also showed increased activity in the brain, which is involved in greater memories.

    "Curious brains are better at learning not only about the subject at hand but also dull information. This is a phenomenon teachers can use in the classroom," says Evie Malaia, a professor. "Say a kid wants to be an astronaut," she says. NL Well, how do you link that goal with learning multiplication tables(乘法表)" "A teacher may choose to ask her class an interesting word problem that involves space exploration," Malaia says. Students may remember the answer to the word problem, but they'll also remember how they found the answer through multiplication.

    What Ranganath wants to know most is why some people seem naturally more curious than others. Lots of factors, including stress, aging and certain drugs  affect dopamine(多巴胺) processing in the brain. "If we could figure these things out, we could help those who may just seem bored," Ranganath says.

    Blackwell says she doesn't have to deal with that problem too often. She says her students love exploring the mysterious unknowns in science: What happens when a car crashes. How do rainbows work "I tell my kids there's no dumb questions," Blackwell says. "That's science: asking questions and seeking answers."

    Running seems easy enough: Just grab a pair of sneakers and put one foot in front of the other, right? Well, anyone who struggled to get through a mile knows it's not quite that simple. We've asked experienced runners to tell us something wrong they did when they started running. The following are some of their answers.

    I got excited and signed up for a half-marathon with a few more experienced runner friends, but I wasn't adequately prepared and didn't train efficiently. I ended up with blisters(水泡) on my feet. I couldn't wear shoes for two days!

—Cali Lavey

    I have always been athletic and I have never been badly injured, but one day I felt a slight pain in my knee. I ignored it for a month until I realized I was having a hard time putting weight on my right leg. I finally went to a doctor. It took four months of weekly physical therapy(治疗) to heal. I shouldn't have done that.

— Arnold

    My biggest mistake was treating running like soccer practice: If I wasn't exhausted by the end of practice, I felt as though I didn't work hard enough. I run all of my runs at 80 percent effort, or the equivalent of what I now call tempo runs (节奏跑). I wasn't warming up to the pace or cooling down effectively.

— Kate

    I decided to go out for a run during the hottest part of the day. At the time, I told myself that it would be refreshing to sweat a little, but I didn't bring adequate water. I returned feeling completely rundown, dehydrated (脱水的), and exhausted. If you must go out on a run during unfavorable weather, wear proper suits and bring enough water to keep you feeling strong.

— Sarah

    Nurses are required in all areas of the medical field from hospitals and nursing homes to schools and the armed forces, leading to a great need of certified nurses. Here are some best universities for a degree in nursing.

    Simmons College

    Simmons College is a private women's college founded in Boston in 1899. Nursing is the top-ranked major at the school as well as the most popular. The nursing graduates from Simmons make about $58,000 every year.

    Villanova University

    Villanova University is a research university located in Radnor Township, Pennsylvania. Named after Saint Thomas of Villanova, the school is the oldest Catholic university in Pennsylvania. Nursing is a popular major and is offered as an online degree as well. The nursing graduates from Villanova make about $63,000 every year.

    University of California, Los Angeles

    The UCLA School of Nursing is known for its excellent education provided by a group of leaders in the medical field. The four-year program allows students to be qualified nurses through classroom learning and clinical training. A nursing degree from UCLA leads to positions in many hospitals and clinics, with a yearly income of about $84,000.

    New York University

    New York University attaches great importance to real-world experience. Along with taking classes in school, students mainly work in the health care environment receiving technical training Additionally, NYU College of Nursing students have the chance to study in Abu Dhabi, China and other countries in Africa, Asia, Europe and South America. The education from NYU will prepare students to help doctors treat patients, earning a yearly income of about $86,000.

    Scholarship Application Tips in 2013 for college students

    Before you apply

    ⒈Work hard to get good grades. Don't sweat about one bad grade, but always strive(力求)to do your best.

    ⒉Get involved, and stay involved, in extracurricular(课外的)activities. Sports, clubs, drama, bands and orchestras－these often count toward a student's overall scholarship application evaluation. The same goes for paid (or unpaid) work experience.

    ⒊Begin your scholarship research early－by your sophomore(大学二年级)or junior year of high school, if possible. Make special note of application deadlines, as they can vary from late summer to late spring.

    ⒋Apply for as many scholarships as you are eligible(符合条件的)for－several smaller scholarships can add up to a lot of money.

    During the application process

    ⒈Read the supplementary materials that come with scholarship application forms to better understand the program's focus (community service, subject interest). Try to answer the questions with the focus area in mind.

    ⒉Answer questions as they are asked. Don't got off topic.

    ⒊If there is a financial component to the application, make sure you get accurate and complete information from all appropriate sources to ensure your eligibility.

    ⒋Take your time. Write down everything you can think of for each question, then set the application aside for a day so you can look everything over again before you send it off.

    ⒌Don't wait until the last minute to complete your application, especially if you are applying online. Computer systems can get clogged(阻塞的)with the large volume of applicants hoping to submit their qualifications during the last few days and hours before a deadline.

    ⒍If a third party has to complete part of your application, such as providing a letter of recommendation, make sure you ask them early on and remind them as often as necessary to ensure they provide you with the necessary materials.

    ⒎Last but not least, review your application with your parents to make sure you haven't left out any important details.

Good luck to the students applying for the 2013 scholarship programs!