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.”

    Typing with one hand when the other one is occupied can be a real pain, so imagine having to type with just one foot. It's got to be a nightmare, but 21-year-old Hu Huiyuan from China's Anhui Province is using her only functional foot to write not just a few sentences, but an entire fiction novel!

    Born prematurely(过早地), Hu was diagnosed with cerebral palsy(脑瘫) when she was only 10 months old. This left her permanently paralyzed—the only parts of her body she can move are her head and left foot. As she grew older, she learned how to perform everyday tasks using her foot.

    Despite not having received formal education, Hu is surprisingly well-spoken. Over the years, with the help of her mother, she taught herself to read and write. “I'm not a genius, but I'm very focused,” she said, modestly. “When I watched TV in my childhood, I often learned words on the screen.”

    “When I was teaching her how to speak, I had to repeat every single word a thousand times before she got it, ”Hu's mother said. “But once she mastered the word. I felt satisfied.”

    With time going by, Hu's language got so proficient that she set out to write a story about the pursuit of dreams and love. She's doing this by typing out every single word on her computer using only one foot.

    In spite of all these setbacks, Hu is able to type 20 to 30 words a minute. She has already written six chapters—that's 60,000 words—and says she only has two more chapters to go before the novel is complete.

    A warm drink of milk before bed has long been the best choice for those wanting a good night's sleep. But now a study has found it really does help people nod off—if it is milked from a cow at night.

    Researchers have discovered that “night milk” contains more melatonin (褪黑激素), which has been proven to help people feel sleepy and reduce anxiety.

    The study, by researchers from Seoul, South Korea, involved mice being fed with dried milk powder made from cows milked both during the day and at night.

    Those given night milk, which contained 10 times the amount of melatonin, were less active and less anxious than those fed with the milk collected during daytime, according to the study published in The Journal of Medicinal Food.

    Night milk quickened the start of sleep and caused the mice to sleep longer.

    While the effect of cows milk harvested at different time has not been tested on humans up to now, taking melatonin drugs has been suggested to those who are struggling to fall asleep at night.

    Previous studies have also indicated that milk can be excellent for helping sleep because of the calcium content, which helps people to relax.

    Milk is also sugar-free and additive-free with nutritionists recommending skimmed milk as the best choice before bed as it is the least fattening. The more fat you take in before bedtime, the greater burden you will put on your body at night.

    For their nick-of-time acts, Toby, a 2-year-old dog, and Winnie, a cute cat, were named Dog and Cat of the Year by the American Society for the Prevention of Cruelty to Animals.

    As Amy Paul choked（哽住）on a piece of apple at her home, her dog jumped up, landing hard on her chest and forcing the piece in her throat out. When the Keesling family of Indiana was about to be killed by carbon monoxide, their cat, Winnie, clawed at the wife Cathy's hair until she woke up and called for help.

    No one could explain their timely heroics.

    Both pets were rescued by their owners in infancy—Toby as a 4-week-old thrown into a garbage bin to die, and Winnie as a week-old orphan hiding under a barn, so helpless that Cathy's husband, Eric, had to feed her milk with an eyedropper.

    As the Keeslings recalled it, a gas-driven pump being used broke down, spreading carbon monoxide through the house. By the time Winnie went to rescue, the couple's 14-year-old son was already unconscious. “Winnie jumped on the bed and was clawing at me, with a kind of angry sound,” Cathy Keesling said. The state police responding to her 911 call said the family was only minutes from death, judging by the amount of poisonous gas in the house.

    Both Toby and Winnie accompanied their owners to the awards luncheon.

    It has been a year since I found out my friend had passed away. I still store his phone number, even though I know calling the number will never reach him again. I feel like if I deleted (删除) his phone number, it would mean he was really gone.

    Over the past few years, we have planned to travel together just to see the dolphins in the sea. However, for some reasons it didn't happen, yet I always took his calls over the years. We shared a lot of interests.

    When I knew that he had been diagnosed (诊断) with a very serious illness and was in hospital, I remembered sending messages to him. I did not receive a message back, so I left a voicemail. A week later, I sent him a message once again. However, I still didn't get a reply. I thought he was busy. During the next several months I was very busy, too. Suddenly, in that mid-summer, I received a short message: "Sorry, Marlynn, He has passed away."

    I was very sad and surprised at the words. I was very sad and regretful. I regretted that I let the months pass without trying again. I worked with many people who had also lost their best friends. The sadness is often unspeakable. There is guilt (内疚), helplessness and sadness that is difficult to put into words.

    Now I try to be grateful for the times and memories we have. I realize the best thing that we can do is value the ones we love.

Briton Andy Park has probably the rarest addiction in the world. He's addicted to celebrating Christmas.

Park, 45, is known as "Mr Christmas" in Britain. He has been celebrating the December 25 holiday on a daily basis for the past 12 years. He's eaten 4,380 turkeys and 87,600 pies, drunk 4,380 bottles of champagne (香槟酒), and 5,000 bottles of wine, given 21,900 presents, mostly to himself, and spent a fortune on lights and decorations. His festive craze (狂热) has so far cost all estimated (估算) US $427,500.

"I'm going to be doing it for another 12 years. I've never, ever been bored with it. " he said.

The electrician from Wiltshire, southwest England, starts his day with a big breakfast of six pies and a turkey sandwich before heading off to work.

He finishes work by 11:30 am in order to start roasting a turkey—the traditional Christmas dish.

At 3:00 pm he watches a video of the British Queen's annual Christmas speech to the Commonwealth, glass of wine in hand.

Dinner is turkey, wine and a bottle of champagne.

He lays his present to himself under the Christmas tree at 8:00 pm.

He even insists on a full Christmas dinner if he goes to a restaurant or to a friend's house for dinner.

Park is hoping his love of Christmas can translate into SUCCESS in the music charts when he releases a single. It's Christmas Every Day on December 9. "I want to be No. 1," he said. Before now, he has made unsuccessful singles such as The Christmas Man.