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 givennight 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.

    We all see and hear about extraordinary people around us and wonder why we can't be more like them. It's not the big things that make someone extraordinary. Here are some small things that extraordinary people do every day:

    ●{#blank#}1{#/blank#}That you're the boss doesn't mean you are right every time. Learn to back up your decisions with reason. Use logic(逻辑) to explain things, not authority. By doing this your decisions might invite criticism, but you will also get an opportunity to improve.

    ●They are generous with compliments（恭维）. Remember the time, when you worked really hard but got nothing in return? Not even a thank- you. {#blank#}2{#/blank#} So every chance you get to praise someone, do it. A simple, “That was some great work, keep it up,” can go a long way in making the employees feel great about themselves. {#blank#}3{#/blank#}

    ●They are helpful. Never hesitate to help someone. It's fairly simple but it goes a long way. Don't say something vague（含糊）like, “Can I help you?” because they might just say, “No, I'm good.” {#blank#}4{#/blank#} “I had the same problem with this coffee machine in the morning. I think I have figured a way to make it work.” Offer in a way that feels mutually beneficial .

    ●They're in charge of their emotions. Sometimes it is very important to stay silent. Especially when you're angry, you don't want to end up saying things you didn't really mean to. So they take their time to think about what happened, and then come to a decision about how to deal with it. {#blank#}5{#/blank#} Never be too casual with words or actions.

    In some science-fiction movies, robots refuse to die no matter how people fight back (反击). Now, it has turned into a fact. For the first time, researchers have created a robot that can take a beating (挨打) and keep on working. Developed by scientists from Cornell University and the University of Vermont, the new robot looks like a spider with four legs.

    Until now, even the most advanced robot was almost certain to break down when damaged. That's because its computer doesn't know how to operate the machine after its shape has been changed.

    To solve this problem, the scientists put some sensors (传感器) into the machine. The sensors can read how the machine is working and send signals to the computer.

    Using this information, the system follows a new way to tell the machine's shape at any given moment. The computer considers a lot of possible next steps, and it calculates how best to move the robot forward the longest possible distance, before trying to move it again.

    The new technology is a major advance in robotics (机器人技术), scientists say. It may someday help researchers create better artificial arms and legs that give new freedom to people who lack them. The new knowledge might also help scientists understand how people and animals tell their own sense of place in space.

     “Designing robots that can fit changing environments has been a difficult problem,” says scientist Olaf Sporns of Indiana University. “This work provides a new way toward solving this important problem.”

    Imagine putting a seed in a freezer, waiting 30,000 years, and then taking the seed out and planting it. Do you think a flower would grow?

    Amazingly, scientists have just managed to do something very similar. They found the fruit of an ancient plant that had been frozen underground in Siberia—a region covering central and eastern Russia—for about 31,800 years. Using pieces of the fruit, the scientists grew plants in a lab. The new blooms have delicate white petals. They are also the oldest flowering plants that researchers have ever revived from a deep freeze.

    “This is like regenerating a dinosaur from tissues of an ancient egg,'' said Jane Shen-Miller, a biologist of University of California, Los Angeles.

    The plant has a long history. Back when mammoths and woolly rhinoceroses walked on the land, an Arctic ground squirrel buried seeds and fruits in an underground chamber near the Kolyma River in northeastern Siberia. The ground became pennafrost, a layer of soil that stays frozen for a long time.

    Recently, Russian scientists dug out the old squirrel hole and found the plant remains 38 meters below the surface. Back at the lab, the team fed nutrients to tissue from three of the fruits to grow shoots. Then the scientists transferred the shoots to pots filled with soil. The plants produced seeds that could be used to grow even more of them.

    It's important for scientists to know that plant tissues can still be revived after being frozen for a long time. That's because many researchers are trying to preserve the seeds of modem plants by freezing them and then storing them in giant lockers at various spots around the globe. One such endeavor, an underground facility in Norway, is called the Svalbard Global Seed Vault. It stores hundreds of thousands of frozen seeds. If a plant ever goes extinct, scientists could bring it back by taking its seeds from the Svalbard or other storage lockers.

    "No one knows how long they are able to live for, but freezing is basically the format for many plant conservation attempts nowadays," Jane Shen-Miller said. It's a good thing that at least some plants are tough enough to survive in the experience.

    Johnny Smith was a good math student at a high school. He loved his computer. He came home early every day, then he worked with it till midnight. But Johnny was not a good English student, not good at all. He got an F in his English class.

    One day after school Johnny joined his computer to the computer in his high school office. The school office computer had the grades of all the students: the math grades, the science grades, the grades in arts and music, and the grades in English. He found his English grade. An F! Johnny changed his English grade from an F to A. Johnny' parents looked at his report card. They were very happy.   "An A in English!" said Johnny's Dad. "You're a very clever boy, Johnny." Johnny is a hacker.

    Hackers know how to take information from other computers and put new information in. Using a modem, they join their computers to other computers secretly. School headmasters and teachers are worried about hackers. So are the police, for some people even take money from bank computer account and put it into their own ones. And they never have to leave home to do it! They are called hackers.

    Scientists are studying different foods, and they will see which foods protect us from cancer (癌症), and which cause it. It is known that a healthy diet (饮食) will help keep a healthy body weight, which can also decrease the risk (风险) of many types of cancer.

    Fruit and vegetables

    Fruit and vegetables are an important part of a healthy diet. They can decrease the risk of some cancer types like mouth and throat cancer. They are a good source of many important nutrients such as vitamin A, vitamin C, vitamin E, and are an excellent source of fiber.

    Our advice

    Try to get plenty of fruit and vegetables in your diet. Eating fruit and vegetables with a variety of colors will help you get many kinds of vitamins and minerals as the chemicals that give these foods their colors are good for you.

    Meat

    Eating lots of red and processed meat can increase (增加) your risk of stomach cancer. Red meat includes all fresh and frozen beef, pork and lamb. Processed meat includes ham, bacon and sausage. White meat, such as chicken, is unlikely to increase your risk of cancer.

    Our advice

    Eat smaller and fewer parts of red and processed meat. Try using beans or peas instead of meat in your diet. When you cook meat, use low-temperature methods.

    Fat

    Fat is a necessary part of our diet but high-fat diet can increase our risk of cancer, heart disease and other diseases. Meat is higher in saturated fat (饱和脂肪) and eating too much saturated fat may increase your risk of breast cancer.

    Our advice

    Try not to eat too much fatty foods. In particular, try to cut down on saturated fat contained in fatty meat, biscuits, and butter. Try to avoid frying foods in lots of oil.