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Have you got some paper, a pair of scissors and, above all, a desire to decorate your house? Then, we have the perfect holiday artwork for you: Make Star Wars snowflakes (雪花). Remembered as a cherished form of work in classrooms before the holidays, paper snowflakes have drawn many people's attention again.

The designer, Anthony Herrera, just recently released his 2013 collection. "The Star Wars snowflake designs began as just doing designs of characters that I and my daughter wanted to make three years ago," Herrera told us in an email. "The second year I introduced vehicles, and this year I decided to push further by designing battle scenes."

Sometimes, he feels a bit bored with his job. With each year, the designs have got more detailed and various, but the process of creating them remained the same: sketching (画) figures on paper with a pencil until a symmetrical (对称）pattern comes out, then scanning the designs and cut them with scissors. However, he says he has plenty of ideas for new flakes next year, so no two will ever be the same. Hopefully with Star Wars: Episode VII coming in 2015 he'll have even more work in the future.

    Check out your favorite finished versions of Herrera's flakes (from both 2013 and previous years) and download the pictures beneath them and then get down to creating your own work. A warning: Most designs aren't for the casual flake-maker, so patience you must have.

    You know that you have everything to be thankful for：a loving family，a pretty good job，and a healthy working body．Still，you keep feeling that what you have just isn't enough．Sure，you can be happier by making some life changes．{#blank#}1{#/blank#} It will make you more likely to start enjoying that sunshine instead of complaining（抱怨）about sunburn．

    Live in the present．

    The people who are the happiest with their lives are able to enjoy and hug the present moment．{#blank#}2{#/blank#} Focus on what the day will bring you instead of what happened yesterday or what you'll be able to change about tomorrow. {#blank#}3{#/blank#}

    Though your life may not be perfect in the moment，there are surely some things that you can be very grateful for，whether it's your loving family，your amazing friends，your health，your cool new job，or your amazing home．You probably don't have all of these things but surely there are a few things you can remind yourself to be grateful for every single day．

    Stop comparing yourself to others．

    Stop thinking about how big your neighbor's house is，how great your friend Jack's job is，or how perfect your best friend's relationship is．You'll never get anywhere if you compare yourself to others．{#blank#}4{#/blank#}

    Hang out with people who are satisfied with their lives．

    Surround yourself with people who are good influences．They will show you that there are all kinds of ways to be happy，and will maybe even give you some tips for how to walk to difficult situations．{#blank#}5{#/blank#} They are more likely to come up with some reasons to be unhappy．

A．Be grateful for what you have．

B．What if there is a major obstacle (障碍）standing in your way?

C．Take some time to enjoy exactly what you're doing right now．

D．The easiest way to be satisfied with your life is to adjust yourself positively．

E．Avoid people looking for reasons to be upset with their life．

F．But if you drop comparing completely，you'll only be doing yourself a favor．

G．Get regular exercise with friends every day．

    Daylight-powered germ-killing equipment（杀菌设备）may someday help protect health workers from deadly virus like Ebola virus. That is a finding from a study published in the journal Science Advances.

    Study organizers say they've developed membranes（薄膜）that produce very small amounts of hydrogen peroxide（过氧化氢）when left in daylight. Membranes are thin plastic, structures that can serve as barriers. They let some things pass through, but other things art blocked. Hydrogen peroxide, a liquid sold in drug stores, works as a disinfectant（杀菌剂）.

    Nearly 500 health workers were infected and died in 2014 when Ebola spread through parts of West Africa. Caregivers wear full-body protective suits when they come into contact with patients with infectious diseases. But the process of removing the suits is a time when infection can spread if the surface is covered with virus. “If there's any live bacteria or virus on the surface, it's still transmissible and could cause infection,” said Gang Sun of the University of California. He is one of the researchers that worked to develop membranes that could cover the outside of protective equipment.

    When the chemical molecules（分子）on the surface of these membranes are put in sunlight, they react with oxygen in the air to produce small amounts of hydrogen peroxide. Gang Sun explains that the process creates less hydrogen peroxide than what you would use to remove dirt on clothing, for example. But it is still enough to kill organisms.

    Rohan Tikekar is a food scientist with the University of Maryland. He described the development as “quite novel,” or new and different, Tikekar was not involved with the recent study. He said others have developed materials that produce disinfecting chemicals. But most only work under high-energy ultraviolet（U V）light, and not usual daylight. The new membrane also works in the dark for at least an hour or two because of chemical properties that can recharge its germ-killing powers. Tikekar called that an important improvement.

    Gang Sun said the new membranes, though still Far from perfect could be used for things other than protective equipment for health workers. They could also be added to packaging for fruits and vegetables to keep foods fresher and reduce the risk of being polluted. Some versions of the material use natural chemicals' Sun says that one of the next steps is to make it safe to sat

    Should you work out in the gym in the morning instead of in the evening? It all depends. Of course, there are advantages of working out(运动) in the morning.

    You will increase your energy for the rest of the day. “Morning workouts result in better energy levels throughout the day and give you more mental sharpness,” says Dr. Cedrie Byrant, Chief Science Officer of the American Council on Exercise.

    Here is another advantage. In 2017, health researchers found that exercising in the morning helps you sleep better at night. According to the study, in all cases, those who exercised at 7:00am experienced about a 10 percent drop in blood pressure that carried through the rest of the day. They also had about a 25 percent drop in blood pressure at night, slept longer and had more beneficial sleep cycles than when they exercised at other times of the day.

    However, there are disadvantages, too.

    If you are not an early riser, getting out of the bed in the morning can be very difficult. Byran says that if you're not used to exercising in the morning and force yourself to get up, you may not put as much effort into the exercise as you would later in the day. Also, if you aren't careful, you can damage your sleep schedule, which can lead to insufficient sleep.

    Besides, hitting the gym before work can cause a challenge in terms of scheduling. If you work a 9-to-5 job, getting ready for work and going to work can cut your morning workout short, Byrant notes.

    To sum up, it has both advantages and disadvantages. If it suits you better to work out in the morning, you can do so.

    It is every kid's worst nightmare(噩梦) and six-year-old Jaden Hayes has lived it twice. First he lost his dad when he was only at the age of four and then last month his mom died unexpectedly in her deep sleep.

    "I tried and I tried and I tried to get her awake, but... I just couldn't," said Jaden.

    No one could imagine how heartbroken Jaden was.

    But there's another side to his sadness. A side he first made public a few weeks ago when he told his aunt, Barbara DiCola, and now his guardian(监护人)after both his parents died, that he was sick and tired of seeing everyone sad all the time. And he had a plan to fix it.

    "And that was the beginning of it," said Barbara. "That's where the adventure began."

    Jaden asked his aunt Barbara to buy a bunch of little toys and bring him to downtown Savannah, Georgia near where he lives, so he could give them away to anyone who will smile to him. "I'm trying to make people smile," said Jaden.

    Jaden targets people who aren't already smiling and then turns their day around. He's gone out on four different occasions now and he is always successful. Even if sometimes he doesn't get exactly the reaction he was hoping for.

    It is just so overwhelming to some people that a six-year-old orphan would give away a toy -- expecting nothing in return -- except a smile.

    "I'm depending on it to be 33, 000," said Jaden. When asked if he thinks he can make that goal, he answered: "I think I can."

    Artificial intelligence (AI) is practically everywhere today. There are so many products out there which use AI. Some are being developed, some are already in use, and some failed and are being improved, so it's very difficult to name a few of them and regard them as the best.

    Vi

    It is an AI personal trainer which is mainly concerned with fitness and coaching. It, however, requires the use of bio-sensing earphones and other fitness tracking equipment (设备)! It can play your favourite music while you work out and all you have to worry about is the exercise you're doing.

    Deep Text

    Do you ever wonder how an ad appears suddenly just when you are looking for something similar? This is because of Deep Text. It uses real-time consumer (消费者) information to produce data which in turn is used to target consumers. Thus, if you search online for flight tickets from Bangalore to Delhi, it is very likely that an ad relating to hotels in Delhi will soon follow.

    Hello Egg

    If you live alone and miss your mother because you always miss your breakfast or don't know what to eat for dinner, then Hello Egg is exactly what you are looking for. A very healthy choice of the 2-minute noodles and oats, Hello Egg provides you with a detailed weekly meal plan about the needs of your body. It is truly a modern AI-powered home cooking tool for the young.

    Wordsmith

    You can put Mr. Smith into your Microsoft Excel using their free API, and let it write up detailed analysis (分析) of the stories behind your numbers. It can produce detailed reports on thousands of pages of spreadsheets in seconds.