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 integrated 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 (元件),” 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 together the components. “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, but 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.

    While this first robotic flyer is linked to a small, off-board power source, the goal is eventually to equip it with a built-in power source, so that it might someday perform data-gathering work at rescue sites, in farmers' fields or on the battlefield. “Basically it should be able to take off, land and fly around,” he said.

    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.”

    There is an English saying that “Laughter is the best medicine.” Until recently, few people took the saying seriously. Now, however, doctors have begun to look into laughter and the effects it has on the human body. They have found that laughter can really improve people's health.

    Tests were carried out to study the effects of laughter on the body. People watched funny films while doctors checked their hearts, blood pressure, breathing and muscles. It was found that laughter has similar effects to physical exercise. It increases blood pressure, makes the heart beat quicker and makes people breathe deeper; it also works on several groups of muscles in the face, the stomach, and even the feet. If laughter exercises the body, it must be beneficial(有益的).

Other tests have shown that laughter appears to be able to reduce the effects of pain on the body. In one experiment doctors produced pain in groups of students who listened to different radio programs. The group that tolerated（忍耐）the pain for the longest time was the group which listened to a funny program. The reason why laughter can reduce pain seems to be that it helps to produce a kind of chemical in the brain which diminishes both stress and pain.

    As a result of these discoveries, some doctors in the United States now hold laughter clinics(诊所), in which they help to improve their patients' condition by encouraging them to laugh. They have found that even if their patients do not really feel like laughing, making them smile is enough to produce beneficial effects similar to those caused by laughter.

    Planning to get away? Think passport first

    If you're planning to get away from it all this year, you should think passport first. Checking you have a valid passport before you book your trip takes minutes but could save you the trouble and cost of not being able to go.

    Renewing (更新) your passport before it runs out

    You can renew your passport up to 9 months before it can no longer be legally used. So take the time now and save the tears later.

    Applying for a passport for the first time

    Our eligibility (资格) checks mean that it takes a minimum of one week to issue (颁发) a passport. So make sure you don't leave it to the last minute, and apply in plenty of time.

    Help with your application is just around the corner

    Selected Post Office branches and World choice travel agents offer a Check and Send service that helps you with your application. It's convenient and you should receive your passport within 2 weeks.

    If you need to apply for or renew a passport, you can either:

    Pick up a Passport Application Form at Selected Post Office branches and World choice travel agents.

    Or call the Application Form Request line on 0901 4700 100 or visit www.passport.gov.uk

    If your need is urgent, call 0870 521 0410 for an appointment at one of our offices. We can't guarantee to see customers without an appointment.

    From 14th January a guaranteed same day (passport renewals only) or one week service will be available from passport public counters.

    Calls will be charged 60p per minute and the cost per call should not normally be more than 90p.

    Calls are charged at national rates.

    It's that time of year when people need to lock their cars. It's not because there are a lot of criminals running around stealing cars. Rather, it's because of good-hearted neighbors who want to share their harvest. Especially with this year's large crop, leaving a car unlocked in my neighborhood is an invitation for someone to fill it with zucchini（西葫芦）.

    My sister, Sharon, recently had a good year for tomatoes. She and her family had eaten and canned so many that they had begun to feel their skin turn slightly red. That's when she decided it was time to share her blessings. She started calling everyone she knew. When that failed, she began asking everyone in the neighborhood, eventually finding a neighbor delighted to have the tomatoes. "Feel free to take whatever you want, "Sharon told her. Later that day, Sharon found that her garden had indeed been harvested. She felt happy that she could help someone and that the food didn't go to waste.

    A few days later, Sharon answered the door. There was the neighbor, holding a hot loaf of bread. The neighbor smiled pleasantly, "I wanted to thank you for all of the tomatoes, and I have to admit that I took a few other things and hoped you wouldn't mind. "

    Sharon couldn't think of anything else in her garden that had been worth harvesting and said so. "Oh, but you did, "the neighbor said. "You had some of the prettiest zucchini I've ever seen. "

    Sharon was confused. They hadn't even planted any zucchini. But her neighbor insisted that there really were bright-green zucchini in her garden. Sharon felt curious and decided to go to see where the zucchini had grown. The two of them walked together into the backyard. When the neighbor pointed at the long green vegetables, Sharon smiled. "Well, actually, those are cucumbers（黄瓜）that we never harvested, because they got too big, soft and bitter for eating. "

    The neighbor looked at Sharon, shock written all over her face. She gulped（哽住）a few times, and then, smiling, held out the bread, part of a batch she had shared all over the neighborhood. "I brought you a nice loaf of cucumber bread. I hope you like it. "

We understand that in light of the latest government CORONAVIRUS TRAVEL ADVICE, your travel plans will be changing. To reflect this, some terms & conditions for refunding tickets or changing journeys are different to usual.

Refunds on Unused Tickets for Travel

• You can apply for refunds up to four weeks from the last day that the ticket was valid.

• Unused Anytime, Off-Peak and Super Off-Peak tickets can be refunded and a service fee applies. Advance tickets are not refundable. Alternatively, you can change your ticket io travel at a later date — See 'Changing Tickets or Requesting a Travel Voucher' below.

• PLEASE NOTE that if the train you are booked on does not ran or is canceled due to irresistible forces, refund: will be made on ALL TICKETS TYPES with no service fee.

If you are uncertain about travelling, you may wish to consider purchasing a more flexible ticket — such as Anytime or Off-Peak - for travel.

Changing Tickets or Requesting a Travel Voucher

• If you bought an Advance ticket before the National Lockdown was announced on 4^lh January and will no longer be travelling, you should apply for a travel voucher or reschedule your journey free of charge. You need to do this be lore your first train departs and pay the difference if your new ticket is more expensive. Please note you will not be entitled to a travel voucher if your Advance ticket was purchased after 4^lh Jan. Speak to the original retailer of your ticket for advice.

• Anytime, Off-Peak and Super Off-Peak tickets are more flexible and can be changed any time before you travel There is no fee to change these tickets. you will only need to pay any difference in fare.

Refunding Season Tickets

•Unexpired(未逾期的)Season Tickets can be submitted for refund at any time and train companies calculate how much is refunded by bow much value is left on your ticket, they do this by deducting (扣除)the value of any other tickets you could have travelled with in the same lime until you stopped using and return your Season Ticket Refunds can only be backdated with evidence that illness prevented you from travelling. (National Rail Conditions of Travel. Condition 40.4).

• To see how much you could get back from your Season Ticket, try the Season Ticket Refund Calculator below. For more information, including if you require a refund due to sickness that prevented you from using a Season Ticket see the link here,

• Customers can still claim refunds remotely online, minimizing contact between customers and staffs keeping everyone safer. Please see your retailer's website for details.

Travelling on Another Train Company's Service

• In areas where there is cancellation, train companies may agree acceptance of tickets routed via another company For more details, please contact your rail service provider.

Through My Modern Met Academy, our online learning platform, you'll be inspired in classes taught by industry experts. Learn mixed media skills to take your work to a new level! 

Intermediate Embroidery (刺绣)

With the help of artist Floor Giebels, you'll get gradual instructions on how to craft embroidery on printed cloth. Giebels will show you how to combine embroidery with cloth decorated with a photograph. Using that as the base, she'll go into techniques for stitching (缝) over the image and finishing your frame for display. 

Cost/Time: $34.95/1.3h 

Architectural Illustration for Everyone

Artist Demi Lang will take you through the process of drawing structures step-by-step. You'll learn how to choose your tools and paper, and analyze the project's photo. The final assignment is a row of three buildings, which Lang will go through first in line drawing lessons, then inking over the sketch (素描), and adding color to bring it to life. 

Cost/Time: $45.95/ 3.3h 

Beyond Botanicals

In Anna Zakirova's class, she shares the secrets to creating flawless pressed flowers and leaves and using them as the basis for original artwork. Intended for beginners, her class starts with a detailed introduction to the proper tools and continues with an example of how to turn several types of flowers into an artwork. 

Cost/Time: $34.95/ 56min 

Introduction to Pet Photography

Taught by pet photographer Belinda Richards, this class offers in-depth guidance of shooting a gorgeous picture of your dog in a studio setting. Richards will break down how to work with your dog, photograph it, and edit your image. This class is meant for someone who already owns a DSLR camera and has a basic understanding of Photography.