People aren't walking any more—if they can figure out a way to avoid it.

    I felt superior(不为……所动) about this matter until the other day I took my car to mail a small parcel. The journey is a matter of 281 steps. But I used the car. And I wasn't in any hurry, either. I had merely become one more victim of a national sickness: motorosis.

    It is an illness to which I had thought myself immune(免疫的), for I was brought up in the tradition of going to places on my own two legs. At that time, we regarded 25 miles as good day's walk and the ability to cover such a distance in ten hours as sign of strength and skill. It did not occur to us that walking was a hardship. And the effect was lasting. When I was 45 years old I raced -–and beat-—a teenage football player the 168 steps up the Stature of Liberty.

Such enterprises today are regarded by many middle-aged persons as bad for the heart. But a well-known British physician, Sir Adolphe Abrahams, pointed out recently that hearts and bodies need proper exercise. A person who avoids exercise is more likely to have illnesses than one who exercises regularly. And walking is an ideal form of exercise— the most familiar and natural of all.

    It was Henry Thoreau who showed mankind the richness of going on foot. The man walking can learn the trees, flower, insects, birds and animals, the significance of seasons, the very feel of himself as a living creature in a living world. He cannot learn in a car.

    The car is a convenient means of transport, but we have made it our way of life. Many people don't dare to approach nature any more; to them the world they were born to enjoy is all threat. To them security is a steel river thundering on a concrete road. And much of their thinking takes place while waiting for the traffic light to turn green.

    I say that the green of forests is the mind's best light. And none but the man on foot can evaluate what is basic and everlasting.

    Where to Drink

    Cafe San Bernardo

    Join table-tennis and pool-playing port. Cafe San Bernardo has been running since 1912. The Villa Crespo dive bar also offers up table football for￡4 an hour. Service is efficient; with last orders at 5 am. The daily happy hour between 6 pm and 9 pm includes 60 minutes playing your game of choice, plus a half bottle of red wine and a corn pie, for￡9.

    Avenue Corrientes 5436, Villa Crespo, 5411 4855 3956, cafesanbernardo. com

    M Salumeria & Enoteca

Trading only in wine with a story, sommelier (侍酒师）Mariana Torta chooses new ways on a daily basis, and keeps a list of around 250 labels. There's no wine menu—simply take your bottle from the shelf.

    Open 11:00am-11:30pm, El Salvador 5777, Palermo Hollywood, 5411 4778 9016, on Facebook

    Negro Cueva de Cafe

    Coffee has found its place in Buenos Aires. While LAB: Tostadores, the Shelter and Coffee Town are famous new places, Negro Cueva de Cafe is one of the best bars. It serves Ecuadorian, Colombian and Brazilian beans and its attracting cakes include croissant.

    Open 9:30 am—7:00 pm, Suipacha 637, Microcentro, 5411 4322 3000, negrocuevade-cafe. com

    La Calle

Head to the Niceto Vega address and you'll be faced with a pizza. Don't worry, it's the right place. La Guitarrita is the front to “hidden” bar La Calle. Order the house cocktail, special candy, and prepare to sing until dawn with a high-energy young crowd.

    Open 8:00 pm—2:00 am, Niceto Vega 4942, Palermo Soho, 5411 3914 1972, on Facebook

    Sure, it's good to get along with your teacher because it makes the time you spend in the classroom more pleasant. And yes, it's good to get along with your teacher because, in general, it's smart to learn how to relate to the different types of people you'll meet throughout your life. But really, there's one super-important reason why you should get along with your teacher. Kids who get along with their teachers not only learn more, but they're more comfortable asking question and getting extra help. This makes it easier to understand new materials and do yours best on tests.

    When you have this kind of relationship with a teacher, he or she can be someone to turn to with problems, such as problems with learning or school issues.

    As a kid in elementary or middle school, you're at a wonderful stage in your life. You're like a sponge (海绵), able to suck up lots of new and exciting information. On top of that, you're able to think about all this information in new ways. Your teacher knows that, and in most cases, is thrilled to be the person who's giving you all that material and helping you put it together. Remember, teachers are people, too, and they feel great if you're open to what they're teaching you. That's why they wanted to be teachers in the first place to teach!

    Some kids may be able to learn in any setting, whether they like the teacher or not. But most kids are sensitive to the way they get along with the teacher, and if things aren't going well, they won't learn as well and won't enjoy being in class.

    Sometimes the toughest thing about feelings is sharing them with others．Sharing your feelings helps you whether your feelings are wonderful or terrible．Sharing also helps you to get closer to people you care about and who care about you．But how?

    You can't tell your friends what's inside your backpack if you don't know what's in there yourself．Feelings are the same way．Before you can share them with anyone，you have to figure out what feelings you have．

    Making a list of your feelings can help．You can do this in your mind or by writing it out or even by drawing pictures．Is something bothering you? Does it make you frustrated or terrified? Do you feel this emotion only once in a while or much of the time?

    The way a person feels inside is important．If you keep feelings locked inside，it can even make you feel sick! But if you talk with someone who cares for you，you will almost always start to feel better．It doesn't mean your problems and worries magically disappear，but at least someone else knows what's bothering you and can help you find solutions．

    Your mom and dad want to know if you have problems and what's happening in your life．But what if a kid doesn't want to talk with parents? Then find another trusted adult，like a relative or a teacher at school．Maybe this person can help you talk with your parents about your problem or concern．

    Once you know who you can talk with，you'll want to pick a time and place to talk．You can talk publicly in your family．But some kids are more private than others and they will feel shy about sharing their feelings．Then find a quiet place or write it down on a piece of paper．A kid doesn't have to share every feeling he or she has．

    ARCHAEOLOGISTS (考古学家) GUIDED BY laser images of a remote region of northern Guatemala have discovered 20-foot-high walls, watchtowers, and other evidence that ancient Maya societies had been annoyed by warfare threat over many years. The finds have upended long-established impressions of a civilization that it tamed the jungle and built thriving cities, then declined and disappeared quietly beneath the dense tropical forest.

    Among the most surprising discoveries was a large stone complex now called La Cuemavilla. Built on a steep ridge, the heavily fortified site included high walls. Moats which serves as the largest defensive system ever discovered in the region.

    This was surprising says an archaeologist, because we had a tendency to romanticize Maya warfare as something that was largely ritualized. But the fortifications were seeing suggest an elevated level of antagonism over centuries. Rulers were so deeply alarmed that they felt the need to invest in all these hilltop fortifications. There is an almost visible sense of fear in this landscape.

    All these findings owe credit to PACUNAM LIDAR Initiative, a laser survey of some 800 square miles of the Maya Biosphere Reserve in northern Guatemala. Using revolutionary Laser technology, the survey revealed the long-hidden ruins of a sprawling pre-Columbian civilization that was far more complex and interconnected than most Maya specialists had supposed.

    Guided by the new Laser treasure maps, the LIDAR team deployed through the jungle over the past year to conduct hands-on investigations of more than a dozen of the most promising sites-most of which would have been imperceptible without LIDAR.

    "You could walk over the top of a major ruin and miss it, "says an archaeologist who's part of the PACUNA project. But LIDAR picks up the patterns and makes the features pop out with surprising clarity.

    Three-dimensional maps generated by the survey yielded surprises even at Tikal, the largest and most extensively explored archaeological site in Guatemala. The ancient city was at least four times bigger than previously thought, and surrounded by a massive ditch and fortified base stretching for miles.

    Archaeologists stress that LIDAR, for all its utility, will never see below the ground or yield direct dates of occupation. "We still need to dig and hack our way through the jungle, but now we have a very accurate map to guide us."

Ivan Pavlov was a Russian physiologist (生理学家) best known for his discovery of classical conditioning (经典条件反射). During his studies on the digestive systems of dogs, Pavlov found that the animals salivated (流口水) naturally upon the presentation of food. However, he also noticed that the animals began to salivate whenever they saw the white lab coat of an experimental assistant. By associating the presentation of food with the lab assistant, he finally found that a dog would salivate to the presence of a stimulus (刺激物) other than food. He called this response a conditional reflex.

Ivan Pavlov was born in a small village in Ryazan. Russia, where his father was the village minister. His earliest studies were focused on theology (神学), but reading Charles Darwin's On the Origin of Species had a powerful influence on his future interests. He soon stopped his religious studies and devoted himself to the study of science at the University of Saint Petersburg. Pavlov's interests were the study of physiology and natural sciences. He helped found the Department of Physiology at the Institute of Experimental Medicine and continued to manage the program for the next 45 years.

Pavlov received much praise for his work. He worked in the Russian Academy of Science and won the 1904 Nobel Prize in Physiology. The Soviet government also offered lots of support for Pavlov's work, and the Soviet Union soon became a leading center of research on physiology. While Ivan Pavlov was not a psychologist, and reportedly disliked the field of psychology, his work had a major influence on the field, particularly on the development of behaviorism. His discovery and research on reflexes influenced the growing behaviorist movement. and Pavlov's discovery had a major influence on many thinkers, such as John B. Watson.