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 cow's 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.

    There are an extremely large number of ants worldwide. Each individual (个体的) ant hardly weigh anything, but put together they weigh roughly the same as all of mankind. They also live nearly everywhere, except on frozen mountain tops and around the poles. For animals their size, ants have been astonishingly successful, largely due to their wonderful social behavior.

    In colonies (群体) that range in size from a few hundred to tens of millions, they organize their lives with a clear division of labor. Even more amazing is how they achieve this level of organization. Where we use sound and sight to communicate, ants depend primarily on pheromone (外激素), chemicals sent out by individuals and smelled or tasted by fellow members of their colony. When an ant finds food, it produces a pheromone that will lead others straight to where the food is. When an individual ant comes under attack or is dying, it sends out an alarm pheromone to warn the colony to prepare for a conflict as a defense unit.

    In fact, when it comes to the art of war, ants have no equal. They are completely fearless and will readily take on a creature much larger than themselves, attacking in large groups and overcoming their target. Such is their devotion to the common good of the colony that not only soldier ants but also worker ants will sacrifice their lives to help defeat an enemy.

    Behaving in this selfless and devoted manner, these little creatures have survived on Earth, for more than 140 million years, far longer than dinosaurs. Because they think as one, they have a collective (集体的) intelligence greater than you would expect from its individual parts.

    A company in San Francisco, California, has found a way to turn used plastic bottles into women's shoes.

    Every day, millions of Americans drink water and other liquids from plastic bottles. More than 60 million of them are thrown away each day. Many of the plastic bottles end up in landfills or are burned with other waste products.

    A San Francisco start-up company called Rothy's, however, turns this plastic waste into environmentally friendly shoes. Roth Martin is the company's co-founder. He explains how they turn plastic into soft material for women's feet. They take the plastic, clean it, and break it down into small pieces. Then they press them through a device that makes soft fibers. Those fibers are then combined together. This is done by a 3D machine. It is designed to reduce waste while making the shoes. The knitted stuff and the inner part of the shoe are then attached to the shoe's outer part, called the sole. This outer sole is also made from environmentally friendly material: responsibly sourced no-carbon rubber.

    Rothy's shoes are sold online. They are flat shoes, with either a rounded or pointed toe. They come in different colors and designs. They cost either $ 125 or $ 145 per pair, depending on the design. After American actress Gwyneth Paltrow discovered them last year, the demand for the shoes grew. Martin says there is no shortage of material to fill that demand. "We're not going to run out of water bottles any time soon. So we have a limitless supply of material, and I think that is a good sign for our future." When the environmentally friendly shoes wear out, customers can return them at no cost to a company that uses the recycled material to make other products.

    For now, the shoes are only available to be shipped in the United States. However, the company says it will add international shipping in the near future.

Yoga (瑜伽) is a kind of sport. It is very popular around the world now. Everyone, young or old, men or women, can do yoga.

There are many reasons why people like yoga. First, yoga can build up your muscle. Your body will become stronger and more flexible. Second, yoga helps you get rid of stress. What's more, yoga can help your mind stay calm. To put it simply, the reason why so many people are falling in love with yoga is that they are discovering how wonderful it is for their mind, body and spirit.

Yoga began in India about 5,000 years ago. At that time, people wanted to be free, healthy and live a long life. As a result, this kind of exercise was born. The early yoga was part of the religion (宗教). It was usually taught one to one—one teacher and one student. Later, it was accepted by more people.

Yoga is an Indian word that means "to join together". There are three parts of yoga altogether: exercise, breathing and meditation (冥想). In the past, people paid more attention to the spirit. The idea behind the exercise was to join the mind, body and spirit as one.

With the development of the exercise, more and more people are doing yoga as a way of keeping healthy. Among them, office ladies enjoy doing yoga most. Yoga can give them peace, help them feel relaxed and have fewer worries and illnesses.

The term "SMART goals" was coined by in 1954. Since then, SMART goals have become popular with business managers, educators and others because they work. The late management guru Peter F. Drucker developed the concept. Drucker shaped many top managers' career. Management by objectives was one of his primary business theories.

In 2002, Drucker received the highest civilian honor in the U.S.—the Medal of Freedom. He died in 2005 at age 95. Drucker's family decided to look forward instead of backward, and they gathered distinguished business people to form The Drucker Institute.

The institute's website states ""Their work is to transform the archival (档案) treasure into a social enterprise whose purpose is to strengthen society by encouraging effective, responsible and joyful management."

If you have been to a business management class, you may likely have learned how to write goals and objectives in Drucker's way: SMART. If you haven't heard about Drucker, you are in for a treat that will help you achieve what you want and be more successful, whether you are a teacher trying to teach well, an adult learner or a person who seeks to achieve your dreams.

SMART goals are: "s" stands for specific. Make your goal or objective as specific as possible Say exactly what you want to achieve in clear, concise words. "M" stands for measurable. Include a unit of measure in your goal. Be objective rather than subjective. When will your goal be achieved?

How will you know it has been achieved? "A" stands for achievable. Ensure that your goal is feasible in terms of the resources available to you. "R" stands for realistic. Focus on the end results you desire rather than the activities necessary to get there. You want to grow personally, so reach for your goal—but be reasonable or you'll set yourself up for disappointment. "T" stands for time-bound. Give yourself a deadline within a year. Include a timeframe such as a week, month or year, and include a specific date if possible.

In 1962, Rachel Carson's bestseller Silent Spring created an awareness of the dangerous effects of pesticides. Then, a fire, which broke out in 1969 on Cleveland's Guyahoga River, {#blank#}3{#/blank#}(reveal) the problem of chemical pollution in water. Senator Gaylord Nelson dreamed of a similar event {#blank#}4{#/blank#} would get people to take environmental issues seriously. In 1969, he was greatly inspired by protests {#blank#}5{#/blank#} the Vietnam War and came up with the idea for Earth Day.

In the fall of 1969, Nelson announced it and appealed to the entire country to get {#blank#}6{#/blank#} (involve). Consequently, telegrams, letters and telephone calls from all over the country poured in. Since 1970, Earth Day celebrations {#blank#}7{#/blank#} (grow) . Later, Nelson was awarded the Presidential Medal of Freedom because of his work.

Today, numerous {#blank#}8{#/blank#} (community) celebrate Earth Week, an entire week of activities focused on the 64. {#blank#}9{#/blank#} (environment) issues. In 2017, the March for Science {#blank#}10{#/blank#} (occur) on Earth Day and was followed by the People's Climate Mobilization on April 29.