Long before they can actually speak, babies pay special attention to the speech they hear around them. Within the first month of their lives, babies' responses to the sound of the human voice will be different from their responses to other sorts of hearing stimulation. They will stop crying when they hear a person talking, but not if they hear a bell or the sound of a rattle. At first, the sounds that a baby notices might be only those words that receive the heaviest emphasis and that often occur at the ends of utterances(讲话，说话). By the time they are six or seven weeks old, babies can detect the difference between syllables pronounced with rising and falling tones. Very soon, these differences in adult stress and intonation can influence babies' emotional states and behavior. Long before they develop actual language comprehension, babies can sense when an adult is happy or angry, attempting to begin or end new behavior, and so on, merely on the basis of clues such as the rate, volume, and melody of adult speech.

    Adults make it as easy as they can for babies to pick up a language by exaggerating(夸张) such clues. One researcher observed babies and their mothers in six diverse cultures and found that, in all six languages, the mothers used simplified utterances and nonsense sounds, and transformed certain sounds into baby talk. Other researchers have noted that when mothers talk to babies who are only a few months old, they exaggerate the pitch, loudness, and intensity of their words. They also exaggerate their facial expressions, hold vowels(元音) longer, and emphasize certain words.

    More significant for language development than their response to general intonation is observation that tiny babies can make relatively fine distinctions between speech sounds. In other words, babies enter the world with the ability to make those precisely perceptual（知觉的，感性的） recognition that are necessary if they are to acquire listening language.

    Babies obviously obtain pleasure from sound input, too: even as young as nine months they will listen to songs or stories, although the words themselves are beyond their understanding. For babies, language is a sensory-motor delight rather than the route to boring meaning that it often is for adults.

    CHICAGO -- New research on vegetables and aging gives mothers another reason to say "I told you so." It is found that eating vegetables appears to help keep the brain young and may slow the mental decline（下降） sometimes associated with growing old.

    On measures of mental sharpness, older people who ate more than two servings of vegetables daily appeared about five years younger at the end of the six-year study than those who ate few or no vegetables.

    The research in almost 2,000 Chicago-area men and women doesn't prove that vegetables reduce mental decline, but it adds to mounting evidence pointing in that direction. The findings also echo（回应） previous research in women only.

    Green leafy vegetables including spinach（菠菜）, kale and collards （甘蓝） appeared to be the most beneficial. The researchers said that may be because they contain healthy amounts of vitamin E, an antioxidant（抗氧化剂） that is believed to help fight chemicals produced by the body that can damage cells.

    Vegetables generally contain more vitamin E than fruits, which were not linked with slowed mental decline in the study. Vegetables also are often eaten with healthy fats such as salad oils, which help the body absorb vitamin E and other antioxidants, said lead author Martha Clare Morris, a researcher at the Rush Institute for Healthy Aging at Chicago's Rush University Medical Center.

    The fats from healthy oils can help keep cholesterol（胆固醇）low and arteries （动脉）clear, which both contribute to brain health. The study was published in this week's issue of the journal Neurology and funded with grants from the National Institute on Aging.

    About 30 years ago, I left Cuba for the United States with my son. After getting settled finally in Brunswick, New Jersey, I enrolled (注册) my son in kindergarten. Several weeks later, my son's teacher asked me to meet him at his office.

    In the teacher's office, and exchange of greetings was followed by his questions: "Is your son mentally retarded (弱智的)? Does he suffer from any kind of mental disability?"

    Was he talking about my wonderful Scola? No, no, it can't be. What a helpless, lonely moment! I told him that Scola was a quiet, sweet little boy, instead. I asked him why he was asking me all these questions.

    My son could not follow the teacher's directions, he told me, and thus, Scola was disrupting the class. Didn't he know my son did not speak English yet? He was angry: "Why hasn't your son been taught to speak English? Don't you speak English at home?"

    No, I didn't speak English at home, I replied. I was sure my son would learn English in a couple of months, and I didn't want him to forget his native language. Well, wrong answer!

    What kind of person would not speak in English to her son at home and at all times? "Are you one of those people who come to this country to save dollars and sent them back to their country, never wanting to be a part of this society?"

    Needless to say, I tried to tell him I was not one of "those people." Then he told me the meeting was over, and I left.

    As I had expected, my son learned to speak English fluently before the school year was over. He went on to graduate from college and got a job, earning close to six figures. He travels widely and leads a well-adjusted, contented life. And he has benefited from being bilingual (双语的).

    Speaking more than one language allows people to communicate with others; it teaches people about other cultures and other places- something very basic and obviously lacking in the "educator" I met in New Jersey.

    Nola (August 21, 1974-November 22, 2015)was a northern white rhino(犀牛) who lived at the San Diego Zoo Safari Park near Escondido, California. At her death, she was one of only four remaining northern white rhinos in the world. The other three lived in Kenya. World Rhino Day, held on September 2, is to raise awareness(意识) of the less than 30, 000 other rhinos left on Earth.

    "Rhinos need our help today, not tomorrow," Nola's lead keeper Jane Kennedy said. "Last year we lost over 1, 200 rhinos just in South Africa. If we continue to lose more than 1, 000 rhinos a year, in 10 to 20years all the rhinos on the planet will be gone. "

    "Unfortunately, most animals are in danger of dying out because of humans," Kennedy says. "Humans have either poached animals, or because there are over seven billion of us, we've taken up too much of the world's resources". Poachers illegally hunt rhinos for their horns. They sell the horns for thousands of dollars per pound, to be used for art, jewelry, and decorations. Experts believe that one rhino is poached every eight hours.

    In 1975, the San Diego Zoo Institute for Conservation Research started the Frozen Zoo, a program through which researchers have collected cell (细胞) samples from more than 8, 000 different types of animals, including the northern white rhino. Scientists hope that by studying the rhino cells, they will get greater understanding of it, and will find ways to increase its numbers.

    Jane Kennedy describes World Rhino Day as "a celebration of rhinos along with an awareness campaign(活动)for everybody across the world to know that rhinos need our help. "At the San Diego Zoo, children and adults are welcome to visit and speak with zookeepers to learn about rhinos. But you don't have to live in San Diego to celebrate World Rhino Day. It is observed around the world, with zoos and wildlife parks holding special events and programs to teach people about rhinos, and enable them to see the animals up close. For more information, go to www. worldrhinoday.org.

Rosie, a first-year university student in Beijing, entered a classroom for her oral English exam and slid her topic across the table to Joe, a foreign teacher. My Story, it read. "In middle school, my classmates laughed at me for having deaf-mute parents," she began softly. "From that moment on, I decided not to tell anybody. But today…"

It's widely considered taboo(忌讳) in Chinese to discuss the details of an unhappy family life with anyone other than very close friends. However, as Joe has noticed, many Chinese students appear surprisingly comfortable discussing emotional moments from their lives when they speak with foreign teachers in a language different from their own.

"Speaking English," one of his Chinese students told him, "I feel like another person." When speaking Chinese, he is kind of reserved; in English class, he is more open. English, to the Chinese speaker, may be like a mask, creating a buffer(缓冲物)between speaking the truth and the listener's reaction. Students focus on how to speak rather than what is being said. If there's a misunderstanding, English can take the blame.

Another reason why Chinese students are more comfortable sharing their secrets during English class may be the distinct approach to teaching used by their foreign teachers. "I always try to come to each student, make eye contact, have a 20-second conversation and see how they are doing," Joe said. Classes taught by Chinese teachers, in contrast, are more formal. Many students said they had never been asked their opinion in class.

Rosie's English vocabulary is now extensive, but she still can't find the words to describe her feelings towards the English language. "English makes me feel I am different," she said. "English is beautiful."

If you're a teen artist, this is the perfect challenge for you. We've seen just how talented you can be; but this month, we're putting your skills to the test. This contest requires your art to be made out of a wide variety of colors. You should use different colors even for your outlines and shading. Think you're up for the challenge? 

Deadline:June 1

Rules:

You must be a teen (aged 13-19) to enter. 

No inappropriate content. 

Submissions must relate to the topic (only colors, no black-and-white drawings). 

Guidelines and Details:

Your entry must be a character created by yourself. 

There is no limit to the number of characters you can submit. 

How to Submit:

Submit entries through our website. All entries submitted to Teen Ink are automatically considered for the contest. There is no cost to submit or be published. See our submission guidelines for more information. 

Submit your work to the appropriate art category on Teen Ink. Include "only colors" as one of your submission's tags. You can do this by using the "additional tags" field in your submission form. 

Prizes:

Winners and honorable mentions will have their works published in Teen Ink magazine. 

The overall winner will receive a $25 gift card.