Before birth, babies can tell the difference between loud sounds and voices. They can even distinguish their mother's voice from that of a female stranger. But when it comes to embryonic learning(胎教), birds could rule the roost. As recently reported in The Auk: Ornithological Advances, some mother birds may teach their young to sing even before they hatch(孵化)。New-born chicks can then imitate their mom's call within a few days of entering the world.

    This educational method was first observed in 2012 by Sonia Kleindorfer, a biologist at Flinders University in South Australia, and her colleagues. Female Australian superb fairy wrens were found to repeat one sound over and over again while hatching their eggs, When the eggs were hatched, the baby birds made the similar chirp to their mothers—a sound that served as their regular “feed me!”call.

To find out if the special quality was more widespread in birds, the researchers sought the red-backed fairy wren, another species of Australian songbird. First they collected sound data from 67 nests in four sites in Queensland before and after hatching, Then they identified begging calls by analyzing the order and number of notes. A computer analysis blindly compared calls produced by mothers and chicks, ranking them by similarity.

    It turns out that baby red-backed fairy wrens also emerge chirping like their moms. And the more frequently mothers had called to their eggs, the more similar were the babies' begging calls. In addition, the team set up a separate experiment that suggested that the baby birds that most closely imitated their mom's voice were rewarded with the most food.

    This observation hints that effective embryonic learning could signal neurological(神经系统的) strengths of children to parents. An evolutionary inference can then be drawn.“As a parent, do you invest in quality children, or do you invest in children that are in need? ”Kleindorfer asks. “Our results suggest that they might be going for quality. ”

    Residents in the poorest counties in the U.S. face a life expectancy up to decade shorter than their counterparts in the wealthiest areas, according to a study published in the American Journal of Public Health.

    Researchers from East Tennessee State University wanted to better understand how socioeconomic status was associated with heath outcomes. To find out they divided the country's 3,141 counties into 50 new 'states' (with 2 percent of the counties in each) based on household income as opposed to geographic proximity (接近).

    The researchers broke down the data by county since they found state-level data may hide some 'impact of socioeconomic differences on both the best-off and worst-off counties.' They then examined health data from the wealthiest and poorest 'states' (top and bottom 2 percent) to see how residents differed on factors like smoking, clinical care and excessive drinking. Researchers found that there was nearly a 10-year gap in the life expectancy of men with an average of 79.3 years in the wealthy counties compared to 69.8 years in the poorest. For women, the difference was slightly less - 83 years in the wealthiest counties and 76 years in the poorest.

    The study authors caution that while they found a connection between socioeconomic status and health outcomes, they did not analyze cause and effect. But they suggest that the data shows how policy makers should not just focus on state-wide initiatives (主动性) but more targeted efforts to help those most at risk. “With limited resources, methods of pinpointing the poorest counties can assist in the allocation of resources and programs to those communities that are in the greatest need,'' the study authors wrote.

Having Breakfast or Not

    Will it matter if you don't take your breakfast? A short time ago, a test (试验) was given in the United States. People of different ages, from 12 to 83, were asked to have a test. During the test, these people were given all kinds of breakfast, and sometimes they got no breakfast at all. Scientists (科学家) wanted to see how well their bodies worked when they had eaten different kinds of breakfast.

    The results show that if a person eats a right breakfast, he or she will work better than if he or she has no breakfast. If a student has fruit, eggs, bread and milk before going to school, he or she will learn more quickly and listen more carefully in class. The result is opposite to what some people think. Having no breakfast will not help you lose weight (减轻体重). This is because people become so hungry at noon that they eat too much for lunch. They will gain weight (增加体重) instead of losing it. You will lose more weight if you reduce your other meals.

How to make Quick Decisions For Your Life

    We make decisions every day. {#blank#}1{#/blank#}When it comes to making decisions, choosing the right one can at times be stressful, especially if the decision must be made quickly. Indecision often weighs us down, but there are some useful tips for making quick decisions more easily.

    {#blank#}2{#/blank#}Sometimes the key to making a quick decision comes down to planning ahead of time for just such an occasion. We all know we're going to come to an important decision-making point sooner or later, so having a plan already in hand can put our mind at ease when that time comes.

    Overcome fear. {#blank#}3{#/blank#}While it may seem difficult to overcome the fear of making the wrong choice, many experts agree that we shouldn't be afraid to make the wrong decision, even if it seems important. The vast majority of wrong decisions can be corrected, while delaying decisions can often lead to more problems.

    Write down all the advantages and disadvantages of your decision. Even if you don't have all the information, writing down all the pros and cons（优缺点） is a good starting point for figuring out what to do. In cases where there simply isn't enough time to write things down, make a mental list in your mind. Thinking of the pros and cons can help you organize your thoughts. {#blank#}4{#/blank#}

    Determine criteria. Remember that every decision you make should come with a certain list of criteria. {#blank#}5{#/blank#}But once you know the requirements you're looking for, making a decision will become easier. Look for the choice that satisfies the list you've made, and once that choice is found, you should move ahead with it.

A. Have a plan.

B. The list may be short or quite long.

C. Communicate your decision with others.

D. And this can always lead to a clear answer.

E. So cut out any options that you know you will not choose.

F. Often, one thing that keeps us from making decisions is fear.

G. Some can be very important while others are not serious in the long run.

The Seven Cs of a Good Letter

    What is the secret of writing a good letter? Here are two main ones. Don't try to be fancy. Don't try to impress your reader. You will be successful if you follow these seven Cs.

    Clear. Use short, direct sentences. {#blank#}1{#/blank#}Try your tone as if the reader were right there with you. Above all, don't use an introduction.

    Correct. {#blank#}2{#/blank#}Don't guess, even for spelling. Refer to your dictionary. If you need to, check a reference book too. Use them as much as you need to.

    Complete. Don't scatter(分散) your points. {#blank#}3{#/blank#}This is good organization too.

    Courteous. Be friendly rather than overly casual. Present your information nicely even if you are complaining about something. In all letters, treat others as you want them to treat you.

    Concise. Make each point as clearly and briefly as you can.

    Conversational. This is really the secret of good writing. {#blank#}4{#/blank#}Such a letter has a natural, friendly tone. Let your personality come through naturally.

    Considerate. {#blank#}5{#/blank#}Write about what you believe the reader needs or wants to know. Try to be helpful. This will build good feeling toward you.

    The seven Cs are about writing letters. But how about school papers? Use the seven Cs. Write as if you are talking to your teacher or professor. You'll be surprised. You'll almost instantly become a good writer. And you might even enjoy writing from now on.

A. Just "talk" to the person.

B. Make them easy to understand.

C. Make sure what you say is correct.

D. Include long sentences in your letter.

E. Writing should not be taken too seriously.

F. Think of the readers' point of view as you write.

G. Finish one point completely before going on to the next.

    What is happiness? When you can feel inner peace and satisfaction, you are happy. {#blank#}1{#/blank#} This usually happens when we do something we love or achieve something that we value. It is our opinions that make us feel happy or unhappy. All of us constantly go through various situations or conditions, but we do not have to let them influence our reactions and feelings. {#blank#}2{#/blank#}

    Try hard to make a change of the way you look at things. {#blank#}3{#/blank#} That means looking at the good and positive side of every situation. Pay attention to solutions, not problems. Listen to relaxing and uplifting music. Watch funny and interesting programs that make you laugh.

    Always look at what you have done and not at what you haven't done. Look at what you can do, not at what you cannot do. Each day do at least one act to make others happy. When you make someone happy, you'll become happy, and then people will try to make you happy. {#blank#}4{#/blank#} On the contrary, be happy for their happiness. Communicate with happy people and try to learn from them to be happy. Remember, do your best to stay detached (冷静的) when things do not occur as intended and desired. Detachment has much to do with inner peace. {#blank#}5{#/blank#}