A study published Monday found that people who sleep less tend to be fat，and experts said it's time to find out if more sleep will fight fatness.

    “We've put so much emphasis on diet and exercise that we've failed to recognize the value of good sleep，”said Fred Turek，a physician at Northwestern University.

    Monday's study from Eastern Virgnia Medical School in Norfolk covered 1,000 people and found that total sleep time decreased as body mass index－a measure of weight based on height increased.

    “Men slept an average of 27 minutes less than women and overweight and fat patients slept less than patients with normal weights，”it said.In general the fatter subjects slept about 1.8 hours a week less than those with normal weights.

    “Americans experience insufficient sleep and fat bodies.Clinicians are aware of the burden of fatness on patients，”the study said.

    “Our findings suggest that major extensions of sleep time may not be necessary，as an extra 20 minutes of sleep per night seems to be associated with a lower body mass index，”it added.

    “We caution that this study does not set up a cause­and­effect relationship between restricted sleep and fatness，but investigations indicating success in weight loss via extensions of sleep would help greatly to set up such a relationship.”

    The study was published in the Archives of Internal Medicine along with an editorial by Turek and Northwestern colleague Joseph Bass commenting on it and related research.

    In an interview，Turek said some studies have shown the lack of sleep causes declines in an appetiteholding back protein hormone，and increases in another hormone that cause a longing for food.“In addition neuropathies(神经疗法)in the brain governing sleep and fatness appear to overlap(部分重叠)，”he said.

    “Fatness has been rising dramatically in developed countries and reached epidemic(流行病)levels in the United States，”it added，“leading to a variety of health problems.”

    Our series The Genius Behind will take you inside the minds of people who are making the impossible possible. Whether it is designing the fastest ever land vehicle, helping the blind to see or creating space history, success relies levels of knowledge to new heights . What can we learn about genius from minds? Based on the people and the projects outlined in the series, we've come up with five lessons.

    Lesson one: New challenges require new ways of thinking

    Bloodhound SSC aims to be the first vehicle to break the 1,000 mph barrier. One of the key challenge has been to design the wheels. Thinking twice, Mark Chapman, chief engineer decided to change the way they were trying to solve problems and came up with a wheel design, part car, part jet fighter and part spaceship, which would hold together and was strong enough.

    Lesson two: Let evidence share your opinion

    Geophysicists widely believed that water on Earth originated from comets. But by studying rocks, Steven Jacobsen discovered water hidden inside, suggesting that the oceans gradually made its way out of the planet's interior many centuries ago. “Unfortunately, I had a pretty hard time convincing others,” he admits. Only time can tell whether the new theories are true.

Lesson three: It really is 99% efforts

    Sheila Nirenberg at Cornell University is trying to develop a new prosthetic device(假肢器官)for treating blindness. “Sometimes I'm exhausted and I get burnt out,” she adds. “But then I get an email from somebody saying that they can't see their own children's faces, and it is like, 'How can I possibly complain? Once I thought of this, I couldn't eat, I couldn't sleep—all I wanted to do was work'. It gives me the energy to just go back and keep doing it.”

    Lesson four: The answer isn't always what you expect

    Sylvia Earle has spent decades trying to see the ocean with new eyes. Her “dream machine” is a submarine that could take scientists all the way to the bottom of the deepest ocean floor what sort of material could best withstand the types of pressure y would encounter thousands of miles below the ocean surface?” It could be steel, it could be titanium, it could be some sort of ceramic, or some kind of aluminium system,” says Earle. “But glass is the best choice.”

    Lesson five: A little luck goes a long way

    It was considered as one of the biggest success stories in the history of space exploration—20 years of planning ended earlier this year with the Philae lander landing safely Comet 67P over 300 million miles(480 million kilometers)away from Earth, though Philae's anchoring harpoons(锚定鱼叉)didn't fire as planned.

    As a matter of fact, genius is difficult to define. “Genius is a funny word,” says Nirenberg. “I just sort of ignore it and just go on with life. You just do what you do regardless of whatever label's attached to you. I don't know really how else to explain it.

    It's important that parents talk with their kids. But some kids hardly talk to their parents. How can parents get their kids to talk to them more? Here is how I do it.

    From the time my boys were little, we had strict rules about screen time in the car. We did not watch movies unless we were going to be in the car for more than an hour. Now that they are older, we have the same rule about earphones, let alone phones.

    I have watched about 11 billion YouTube videos featuring everything from stupid kid stunts (特技) to stupid professional stunts and sports highlights. These are not interesting to me but they are interesting to my kids, so I watched them all. I also try to find funny things in the news to use as conversation starters.

    Listening is the key to more talking, right? But sometimes kids just need to talk instead of having a two-way exchange. Or there are other kids in s the car who have somehow forgotten that the driver is an actual mom, and they talk about some serious news. I just listen to them quietly. Make note of things to circle back to if necessary. Just let the words flow when what they really need is your listening.

    My kids love stories about the older days. They want stories about me falling in the dining hall, getting in trouble at school or crashing my car, but not the, “I walked 10 miles to school in the snow”. Luckily I have plenty of examples and provide just enough information to cause questions for more details.

    Eco City Farms is an educational nonprofit organization. It seeks to empower the community by teaching economic development, job training and a healthier way of living. The group has set up farms near automobile repair businesses and fast food stores in urban neighborhoods.

    Social activist Margaret Morgan-Hubbard founded Eco City Farms. She says that lack of fresh produce is a major health problem for children and their families living in Maryland. "What's critical is that 70 percent of the people in these towns are either overweight, have some illnesses, for example, diabetes, or have other kinds of diet-related ailments because they don't have access to healthy food.

    Eco City Farms offers several programs for agriculture, food and finding jobs with environment-friendly businesses. People can also learn how to cook healthier foods and teach others how to prepare meals. On a recent day, Philip Sidibe demonstrated his cooking skills. He prepared Aloco, a popular food in Cameroon where he grew up. He and other young people not only cook their food, they also grow it in a large garden.

    Tameka Barbour-Gaskins lives in Autumn Woods. She says her whole family is eating healthier meals because of the local produce. "I like junk food. I like quick meals. Not easy to just go from eating a certain way all your life to switching over to being healthier… With the urban garden here, with my son learning, he can help me switch around my style of eating. I want a healthy family."

    Margaret says the urban garden is an agent for change and the young people are its newest supporters. "Our program is about planting seeds. It's about planting seeds not just in the ground, but in other human beings so that the movement can grow and it's really exciting because these young people will be working with us throughout the year to help plan the actual farm and to finally own it."

    Looking back at my younger years, I am sometimes amazed at how life has turned out. Nothing is exactly what I had originally planned for. The only thing that stays the same is who I am, my values, and my interests. If I could go back in time and hang out with my younger self for a day, here's what I would tell her.

    ⒈Everything happens for a reason.

    Without mistakes and failure, you would never have learned. Without pain, you would never have grown. So don't stress or think that life is unfair, because everything happens for a reason. And only time will tell what it will teach us.

    ⒉Focus on one thing at a time. You can have it all but not all at once.

    It is not surprising that many of us are doing too many things at once. We need to make ends meet. But if you are working three jobs at a time, it is not likely that you will succeed at any of them. You have to keep your eyes on the big picture. You have to ask yourself what exactly do you want to achieve for the next 10 years? Focus on one thing at a time. Achieve your goals one by one.

    ⒊You can plan ahead, but your plan will definitely change when the time comes.

    You can plan ahead because sometimes planning ahead can give you a clearer direction of where you want to go. However, plans will almost always change, so be prepared！

    ⒋Trust your instincts.(直觉)

    Don't worry too much about a decision you have to make. Just do what feels right. You know what you want. You might consult other people. But deep down, you know what you want. Do what makes you happy. Because at the end of the day, even if you follow logic, you will want to quit and follow your heart.

    ⒌It's okay to be unsure about your purpose in life.

    You might be graduating or have hit a turning point with your career. You might feel a bit lost and unsure of where to go. It's okay. Go out there and try as many different things as you can. Don't ever feel like you're wasting your time. Enjoy the journey. Don't rush. Every little path will lead you somewhere. And looking back, you will be able to connect the dots. It will all make sense.

    ⒍Don't try too hard with people.

    Don't worry if you feel like it's hard to make new friends. Just be yourself and be as open as you can. It might take a while until you find new best friends and a mate for life, but when you do, you will know it. It's not hard work. So, just do your thing and be yourself.

A letter to my younger self

Who's in control of your life? Who's pulling your strings? {#blank#}1{#/blank#}We learned this way of operating when we were very young, of course. We were brainwashed. We discovered that feeling important and feeling accepted was a nice experience and so we learned to do everything we could to make other people like us. As Oscar Wilde puts it, most people are other people. Their thoughts are someone else's opinions, their lives a mimicry (模仿), their passions a quotation.”

So when people tell us how wonderful we are, it makes us feel good. We long for this good feeling like a drug一we are addicted to it and seek it out wherever we can. {#blank#}2{#/blank#}Just as drug addicts and alcoholics live worsened lives to keep getting their fix (成瘾物), we worsen our own existence to get our own constant fix of approval.

But just as with any drug, there is a price to pay. The price of the approval drug is freedom-the freedom to be ourselves. The truth is that we cannot control what other people think. People have their own schedule and they come with their own baggage and, in the end, they're more interested in themselves than in you. {#blank#}3{#/blank#}Everyone has different way of thinking, and people change their opinions all the time. The person who tries to please everyone will only end up getting exhausted and probably pleasing no one in the process.

So how can we take back control? {#blank#}4{#/blank#}We should guide ourselves by means of a set of values-not values imposed from the outside by others, but innate values which come from within. If we are driven by these values and not by the changing opinions and value systems of others, we will live a more authentic, effective, purposeful and happy life.

A. I's the inner self born in our mind that is keeping us under control.

B. Furthermore, if we try to live by the opinions of others, we will build our life on sinking sand.

C. As a matter of fact, people sometimes fail to understand who they are and where they are going.

D. For the most of us, it's other people-society, colleagues, friends, family or our community.

E.I think there's only one way-make a conscious decision to stop caring what other people think.

F. Therefore, we are so eager for the approval of others that we live unhappy and limited lives, failing to do the things we really want to.