If you are sitting, please stand up. Move your legs. Touch your toes if you can. Do anything but sit. New research shows that if you cut down on the time you spend sitting, you might live longer. Sitting less than three hours a day might extend your life by two years. Cutting television time to less than two hours a day can add one point four years to life.

    The human body is designed to move. The fact is just the opposite. Modern lifestyles and office jobs rarely give us the chance to move around. We sit while we're eating; we sit in the car; we sit while we are watching TV. And most of us sit for many hours at work. Sitting is something we do all the time. On average, Americans sit for four and a half to five hours a day. But that does not make sitting good for us.

    Though you may exercise often, that does not mean you can sit for the rest of your waking hours. We can't throw away physical activity. It is extremely important. Even if you exercise for 30 minutes a day, what goes on in the other 23 and a half hours a day is also very important.

    Changes are coming to some offices, especially in the design of desks. A “standing desk” lets people stand while they work. Another new design is called the “treadmill desk”. It is an exercise machine that lets you walk slowly in one place. Even some U.S. schools begin to experiment with desks that are part bicycle to keep children moving.

    Many companies may not buy a standing desk for everybody. However, they may get five standing desks or a treadmill desk for their employees and put them in a certain place where people can go for an hour a day to answer their emails or talk on the phone. Experts suggest some other activities: take a walk at lunchtime; walk to the offices and talk directly instead of emailing colleagues. All these activities may help you live longer.

Welcome to the Kids' Science Challenge!

    Do you like science projects and winning some awesome gifts? This is the challenge for you. What's even better is that you don't have to build anything--simply come up with an original idea or design that relates to one of three topics given below.

Wonderful Sounds

    Ready for Wonderful Sounds? Click on Science Secrets to meet our sound specialist. And be sure to download fun activities with crazy new sounds and musical instruments in the Dig In section! Now what kind of new musical instrument can you invent?

Super Material for Sports

    Ready for Super Material for Sports? You'll discover the amazing world of Materials Science, where scientists and engineers develop new materials for everyday functions--like sports! Click on Science Secrets for information about our scientist. And don't forget to download the fun activities in the Dig In section! Now can you come up with a new sports material that would help you play your favorite sport?

Magical Microbes

    Ready to discover Magical Microbes, the tiniest living things on earth? Click on Science Secrets for information about our scientists. And be sure to download all the fun activities in the Dig In section! Now can you think of a brand new way that microbes can help people?

    I considered an active social life as basic human necessity. Yet when it dawned on me just how much time I was spending socialising, I realised I may be taking it to an extreme. I calculated that, on average, I was spending 22 hours or more each week on social activities. So, to see what would happen to my work output, health and wellbeing, I decided to try and cut out my social life entirely.

    I knew, at times, I filled my schedule simply out of fear of missing out (FOMO), but also as a way to shift focus away from my work. For one month, I declined all in-person activities with friends: going out for drinks; dinners; parties and non-work related events, to see if it would make me more productive, improve my focus and career prospects.

    On day one of the month-long experiment, I had to fight some anxiety over missing out. But as the days passed, I started to relax. I only had one option to consider for Saturday night—to stay home—and this limitation left me more satisfied in my decision. I felt more content working, reading or watching TV.

    While I found more time to work, I also noticed a change in my overall health. I found myself cooking more at home, doing daily exercise, getting to bed earlier each night, reading, and enjoying moments of rest and boredom throughout the day.

    Having no social life left me more free time than I'd imagine. Such idle moments are vital for creativity, and mind wandering has been linked to creative problem solving. During the experiment I found myself regularly brainstorming new ideas and reimagining existing projects.

    Of course socialising is an important way to build work contacts. While one month of no social life did not impact my relationship with existing clients, if I had continued, it may harm my ability to build new ones.

    Imagine you're standing in line to buy a snack at a store. You step up to the counter and the cashier scans your food. Next, you have to pay. But instead of scanning a QR Code(二维码) with your smart phone, you just hold out your hand so the cashier can scan your fingerprint. Or, a camera scans your face, your eyes or even your ear.

    Now, this type of technology might not be far away. As technology companies move away from the traditional password, biometric (生物特征识别的) security, which includes fingerprint, face and voice ID, is becoming increasingly popular.

    In 2013, Apple introduced the iPhone 5s, one of the first smart phones with a fingerprint scanner. Since then, using one's fingerprint to unlock a phone and make mobile payments has become a commonplace, bringing convenience to our lives. And since 2016, Samsung has featured eye-scanning technology in its top smart phones, while Apple's new iphone X can even scan a user's face. But despite its popularity, experts warn that biometrics might not be as secure as we imagine." Biometrics is ideally good in practice, not so much," said John Michener, a biometrics expert.

    When introducing the new iPhone's face ID feature, Phil Schiller, Apple's senior vice-president, said. "The chance that a random person in the population could look at your iPhones X and unlock it with their face is about one in a million." But it's already been done. In a video posted on a community website Reddit, two brothers showed how they were each able to unlock the same iPhone X using their own face. And they aren't even twins.

    "We may expect too much from biometrics," Anil Jain, a computer science professor at Michigan State University, told CBS News. "No security systems are perfect."

    Earlier last year, Jain found a way to trick biometric security. Using a printed copy of a thumbprint, she was able to unlock a dead person's smart phone for the police, according to a tech website Splinter. "It's good to see biometrics being used more," Jain told CBS News, "because it adds another factor for security. But using multiple security measures is the best defense."

    A new mom from Michigan headed for the airport Thursday, nervous about flying alone with her -month-old. When her daughter started crying even before take-off her fears for the flight — to surprise her husband, a US Army soldier at Fort Rucker Alabama — seemed acceptable.

    The couple seated next to her reacted just as Rebekka Garvison had feared, looking visibly unhappy about sitting next to a fussy(难以取悦的)baby. Ms. Garvison moved to a new seat, hoping it would help. When the baby's cries continued, the woman sitting next to her asked if she could try.

    Garvison later described in a grateful Facebook post how the woman, Nyfesha Miller, had the magic touch with her baby. "As soon as she had her, Rylee was looking out the window and stopped crying," Garvison recalled. "When we got in the air she fell right asleep and slept in her lap the whole flight until we got to our gate? Garvison told The Huffington Post she has been in touch with Ms. Miller almost daily since the flight.

    Garvison's post has been shared more than 84,000 times, and received hundreds of warm comments. "Years ago, the same kind of thing happened to me," wrote one mother. "It was a seven-hour flight and I had my ten-month-old little boy with me. A nun （修女）was sitting beside me and she walked him up and down the passage when he got fussy. It was such a relief for me and is something I will never forget."

    Not everyone has had happy experiences with baby air travelers. One airline is considering opening a "baby class" for airplanes with flight attendant nannies（保姆）, reported The Christian Science Monitor's Meredith Hamilton. For now, parents can hope to be seated beside someone like Ms. Miller on their next flight. "Nyfesha Miller, you will never understand how happy this act of kindness has made my family." wrote Garvison.

Finger painting is an art that most people have experienced in childhood. But there are still people who know little about this art form. Finger painting is a simple activity that involves dipping fingers in paints and then using fingers to create objects and shapes on a piece of paper. All you need is a table at elbow height, a few sheets of plain paper, and a few bottles of watercolor. 

When engaging kids in this activity, one should use non-toxic (无毒的) paints only. If not available in the market readily, non-toxic paints can be made at home easily. Preferably, the paints should also be eatable. Finger paints come in bright colors and can be purchased relatively inexpensively. Adults can save money by making their own finger paints using a mixture of cornstarch, food coloring and water.

It is a common fallacy that finger painting is for children alone, rather it's an activity that can be enjoyed by adults in equal measure. Adults can use rubber gloves while painting to avoid dirty marks of paints on their hands. When a group of people are gathered for an exercise of finger painting, it can be a great way of creating a bond between the group. Art and painting parties are a popular concept in the West. Organizations can also use finger painting as a team-building activity by making participants paint together on a large canvas (画布).

There's no limit to the expression of feelings in finger painting. All one needs to do is go all out and put all their feelings on a piece of paper by dipping their fingers in paints. While painting, one may unconsciously choose colors that reflect their emotions. For example, you may choose the color red to express your anger or green to express hope. At times you may be confused, and the painting will help you describe your confused state of mind. Once you get your emotions on paper, you are likely to feel relieved.

So what are you waiting for? Plan a finger-painting session soon, and experience the joy.