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 times 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.

    Studies show that you may be lied to every day anywhere from 10 to 200 times. We say, “Nice song.” “Honey, you don't look fat in that, no.” But another study showed that strangers lied three times within the first 10 minutes of meeting each other. We lie more to strangers than we lie to coworkers. Men lie eight times more about themselves than they do about other people. Women lie more to protect other people. If you're married, you're going to lie to your wife/ husband in one out of every 10 communications. If you're unmarried, that number drops to three. But look, if at some point you got lied to, it's because you agreed to get lied to. Truth about lying: lying's a cooperative act. Not all lies are harmful. Sometimes we're willing to get lied to for social dignity(尊严), maybe to keep a private secret.

    Lying is complex. It exists in our daily and business lives. We're deeply disturbed by the truth. We explain it, sometimes for very good reasons, other times just because we don't understand the gaps between ideals and realities in our lives. We're against lying, but secretly we're for it in ways that our society has practiced for centuries and centuries. It's as old as breathing. It's part of our culture and history. Think the stories from Dante, Shakespeare, the Bible, News of the World.

    Lying has great value to the evolution of human beings. Researchers have long known that the more intelligent the species, the more likely it is to lie. We humans like to become leaders. It starts really early. How early? Well, babies will pretend to cry, pause, wait to see who's coming and then go right back to crying. One-year-olds learn hiding truth. Five-year-olds lie outright and try to control through flattery (奉承). Nine-year-olds, masters of covering up.

    So what do we do about lies? Well, there are steps we can take to guide our way through the bushes. Trained lie spotters (检测员) get to the truth 90% of the time. The rest of us, we're only 54% right. There are clever liars and stupid liars, but there're no real creative liars. While lying, we all make the same mistakes, and we all use the same techniques.

    Philadelphia offers a ton of attractions that are suitable for people of every age and here are some family—friendly attractions.

    Spruce Street Harbor Park

    Spruce Street Harbor Park, one of the best urban beaches in America, is an outdoor heaven on the Delaware River waterfront. Visitors can relax in a hammock, play on the playgrounds, and play games like table tennis and giant chess. Don't miss out on the park at night, when colorful LED lights hanging from treetops make the entire area bright.

    Blue Cross River Rink

    Offering ice skating in the winter and roller skating in the summer, Blue Cross River Rink creates a fun, outdoor experience for the whole family. Visitors can play on the nine-hole mini-golf course during the summer, and enjoy eats and drinks from the on-site bar and restaurant all year round.

    Sesame Place

    Big Bird, Elmo and the other stars of Sesame Street come out and play at Sesame Place, the only theme park in the nation starring the popular TV show's most lovable characters. A water park, interactive activities, parades, fireworks and shows add to the fun.

    Once Upon a Nation Storytelling Benches

    On summer days, uniformed and professional storytellers at 13 storytelling benches throughout Philadelphia's Historic District entertain visitors with true, free, three-to-five minute tales about the colonial era as part of Once Upon a Nation. Children can pick up a Story Flag at any storytelling bench, and then collect a star from every storyteller on their journeys. Flags with all the stars can get free rides on the Parx Liberty Carousel at Franklin Square.

    To start a conversation about the secret to happiness, ABC News' health editor Dr. Richard Besser hosted a Twitter chat Tuesday.  Experts from the National Institutes of Health, Mayo Clinic, Harvard University and TEDMED, as well as clinicians and people from across the country, joined the one-hour discussion. There are countless ways to measure happiness. With research on the topic increasing, researchers have carried out surveys to study people's sense of well-being.

    Angela Haupt, health and wellness editor for U.S. News and World Report, said, “Happiness indicators include life satisfaction, health and community engagement.”

    @toddkashdan added that, “despite problems with self-reports, there is no better way to measure happiness than focusing on personal thoughts and feelings.”

    While scientists try to find out what caused happiness, others often believe that true joy doesn't exist. Dr Friedman, a psychiatrist at New York Presbyterian-Weill Cornell Hospital, said that “happiness is hard to measure, but easy to recognize.”

    Still, common themes about satisfaction come up in these conversations. Finding meaning in daily work was important. Indeed, researchers have found that having creative and purposeful work to do is a key factor in happiness.  But people were quick to state the importance of balancing work and family obligations.

    Chat participants(参与者) agreed that money does not surely bring happiness. And studies agree once people's basic needs like food and housing are met, higher incomes do little to improve your happiness.  At last, people found value in their connections with others.  Research shows that having support through friends, family, and social networks can bring happiness.  Many agree with @drmommy, who said “I measure my happiness by the loving people that are around me.”

    So, can we increase our happiness?  Expressing gratitude(感激) is a possible way of feeling happiness. Researchers have found that people who regularly write down things for which they are grateful in “gratitude journals” have increased satisfaction in life, higher energy levels, and improved health.  In one study, people who read a letter of appreciation to someone in their lives prove happier almost one month later.  Performing acts of kindness can raise your moods

    Data show that our relationships matter, too. People who are interested in meaningful conversations with friends or family are reported to be happier than those who don't. Close interpersonal ties and strong social support are important for happiness.

    Scientists say a huge percentage of bird species are in danger because their habitats, or homelands, are disappearing.

    Traditional migration (迁徙) paths take birds through countries that are not protecting the places for birds to stop, rest and feed. The scientists studied the migration or flight paths of almost 1,500 species. They decided that 91 percent of them passed through dangerous areas.

    The major danger for migratory birds is development. Buildings and pavements have covered the places where birds stop and feed as they move from one part of the world to another. One of the scientists who worked on the study says "Many of these important places have been lost to land reclamation because of urban, industrial and agricultural land expansion".

    The problem, according to scientists, is that many of these small birds die along their migration paths because they don't have a safe place to feed and rest. There is no place to restore (恢复) their energy for the next part of their journey. Countries in North Africa, Central Asia and those along the coasts of East Asia are having the most difficult time in protecting land. The scientists say these countries do not have enough areas that are safe for birds. One species that doesn't exist now is the Eskimo curlew. "Our world gets poorer every time we lose a species," one of the scientists says.

    The researchers say countries need to work together and come up with safe stopping areas for birds that pass through their boundaries. For example, one country might have preserved safe zones for migrating birds. But a neighbor country might not. A bird might die.

    One scientist who is not connected with the report tells Los Angeles Times that while some habitats are changing, more work can be done to make urban areas safe for birds.

    He says small changes, like planting more native plants or keeping cats out of the areas birds would be likely to use, could make a big difference.

    Anyone who is afraid of failure and afraid to face challenges will never taste success, so said our professor in marketing. I laughed it off at that time, but got frightened when it actually happened in my life.

    I landed in a small city in the Middle East to set up a firm, a world－class car rental firm. Having decided on the project, I earnestly settled in preparation. With a positive mind, I told myself nothing should stop me now, and was more than keen to make it a success.

    However, the least expected thing happened. Iraq invaded Kuwait. Tension ran high in the region. Eventually the war broke out, and many people fled the country, leaving my firm in deep trouble.

    As usual, "things become difficult, and every effort seems to bring disappointment, it can be tempting to lower your expectations or even water down your goals and ambitions." I was no exception. I thought of running away. I remembered the words of Thomas Edison, "Many of life's failures are people who did not realize how close they were to succeed when they gave up."

    I decided to hang on, telling myself, "I am not afraid of challenges and obstacles." I stayed on through months of uncertainty and insecurity. Finances ran low, and banks could not wait to get their dues. To add to all this, the banks even threatened to take all my vehicles. I felt I made a wrong decision to move there. I was now ready to face failure.

    I was living against all hopes, believing that something good would happen. After 2 months the war ended. My persistence paid off: people started flooding back and the car bookings picked up, five times over.

    Success comes to the one who dares, even after failure, to think positively and look forward confidently. After all, it is only the experience that makes a man tough. Failure does not mean you will never make it. It means that it will take a little longer. It provides us with a learning experience.