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 achievethis level of organization. Where we use sound and sight to communicate, ants dependprimarily on pheromone (外激素), chemicals sent out by individuals and smelled or tastedby 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 itsindividual parts.

    In the latest romance-drama, Descendants of the Sun (《太阳的后裔》), a handsome soldier Yoo Shi-jin(柳时镇) (Song Joong-ki)(宋仲基) meets the pretty doctor Kang Mo-yeon(姜暮烟) (Song Hye-kyo)(宋慧乔) in a hospital, and he doesn't hesitate to hit on her.

    The dialogue, which takes place early in the first episode(集), immediately indicates that this is no ordinary South Korean drama. There's no family feud (不睦), or love tangles, or guesses and misunderstandings. The 16-episode show is set in the fictional war-torn country of Uruk(乌鲁克). Song Joong-ki is the leader of a special warfare command unit, while Song Hye-kyo plays a doctor who works for a humanitarian medical organization. Both are sent in the midst of disaster and disease as part of their work with UN peacekeeping troops. Both know and show clearly what they want and what they hate.

    But what stands out the most are Song's skills as a pick-up artist(撩妹技能).

    Boldness and creativity are the key weapons in his arsenal. When Kang invites Yoo to drink wine with her, Yoo, who is not allowed to drink alcohol as a soldier, says, ＂There is a way.＂ before kissing her. Forget about the ＂eighth-episode rule＂ . This kiss happens in the fourth.

    Humor also does the trick. On their first date in a cinema, Yoo says, ＂This is the most exciting moment of my life. The moment I am with a beautiful woman before the theater lights go out.＂ When Kang tries to give Yoo a hard time, Yoo jokes, ＂I mistook you for a beautiful woman because it's dark.＂

    And actor Song Joong-ki, who just came back from two years of military service last May, makes sure he delivers his pick-up lines just right.

    ＂In Deep Rooted Tree (《树大根深》) and The Innocent Man (《善良的男人》), he [Song Joong-ki] showed he had the steel to play fearless and heartless men — that he could be taken seriously as an actor, despite his pretty face. In Descendants, he hits the emotional core of every scene, whether he has to be bold and amorous, guarded and mysterious, or sad,＂said critic Foong Woei Wan in The Straits Times.

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

    I felt superior 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 T had thought myself immune(免疫的), for I was bred in the tradition of going to places on my own two legs. At that time, we regarded 25 miles as a good day's walk and the ability to cover such a distance in ten hours as a 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 Statue 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 illness 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, flowers, 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 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 (混凝土) road. And much of their thinking takes place while waiting for the traffic 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.

    The smallest kids on Earth are much smaller than you or your baby brother or sister. They're even smaller than the hairs on your head. We call them “NanoPutians”(纳米小人). Also known as NanoKids, the NanoPutians aren't real people. They are actually tiny molecules (分子) made to look a little bit like people.

    James Tour invented the NanoPutians as a way to teach kids about nanoscience, which refers to the study of things that are smaller than about 100 or 200 nanometers. “The exact size is less important than the possible applications of working with such tiny things,” Tour says, “Nanoscience is the study and development of the small so that it will affect the large.”

One of the goals of the research is to control individual atoms. Carbon, hydrogen, oxygen, and other types of atoms are the building blocks of the universe. They make up planets, rocks, people, trees, CDs — all the stuff out there. “Most things that people build come together in a top-down way”, Tour says. If you want to make a table, for instance, you cut down a big tree, make wooden boards, and hammer them together. Nature, on the other hand, builds things from the bottom up. When atoms join together they make molecules. Each molecule has a certain shape, and a molecule's structure determines what it can do. Molecules can make them come together to make a cell — or a tree.

    Tour and his co-workers turned these molecular structures into cartoon figures and made an animated(动画的) science video about the little people, set it to music and started showing it to kids in school while talking about how exciting research on small things can be.

    “Learning about the NanoKids has opened up a world of possibility for real kids who ordinarily would rather not study biology, chemistry or physics.” Tour says. When you look closely enough, the really small can be really cool.

    Kieron Graham has known from a young age that he was adopted. While he loves his adoptive family, he has always wondered about his birth mother and brother. When his adoptive mom gave him a DNA test tool, they both hoped it might lead to his birth family. But neither guessed it would work so quickly, or that when it did, Graham would learn he and his long-lost brother may have crossed paths every day.

    It took just one week from the time Graham, a college student at Georgia's Kennesaw State University, received his DNA results on Ancestry.com for him to connect with his brother. Graham's DNA results showed that his closest match was a man named Vincent Ghant, and it turned out Ghant lived just a few minutes away.

Graham reached out and learned that the two were in fact long-lost brothers. Their mother, Shawn Ghant, made the difficult decision to place Kieron in adoptive care when he was just a baby. And she has worried and wondered about her youngest son ever since. Graham has since been reunited with his mother and both of his brothers on his mother's side.

    “It's all surreal(离奇的), too many emotions to describe exactly what I'm feeling about the entire situation, but it's a good situation,” Graham tells MNN.

    As fate would have it, Kieron and Vincent are both students at Kennesaw State. They even have the same major: political science. So it's a safe bet the two crossed paths many times over the past three years. And now, thanks to some DNA sleuthing(筛查), the two will cross paths many more times in the years to come.

    “We're getting together on Christmas with everyone, birth mother included,” Graham says. “That's sure to be a very indelible Christmas indeed, which will always be treasured by us.”

    Downloading music over the Internet is pretty common among high school and college students. However, when students download and share copyrighted music without permission, they are against the law.

    A survey of young people's music ownership has found that teenagers and college students have an average of more than 800 illegally copied songs each on their digital music players．Half of those surveyed share all the music on their hard drive (硬盘), enabling others to copy hundreds of songs at any one time. Some students were found to have randomly linked their personal blogs to music sites, so as to allow free trial listening of copyrighted songs for blog visitors, or adopted some of the songs as the background music for their blogs. Such practices may be easy and free, but there are consequences.

    Sandra Dowd, a student of Central Michigan University, was fined US $7,500 for downloading 501 files from Lime Wire, a peer-to-peer file sharing program. Sandra claimed that she was unaware that her downloads were illegal until she was contacted by authorities. Similarly, Mike Lewinski paid US $4,000 to settle a lawsuit（起诉）against him for copyright violation (违反). Mike expressed shock and couldn't believe that this was happening to him. "I just wanted to save some money and I always thought the threat was just a scare tactic(战术)." "You know, everyone does it," added Mike.

    The RIAA (Recording Industry Association of America), the organization that files lawsuits against illegal downloaders, states that suing (控告) students was by no means their first choice. Unfortunately, without the threat of consequences, students are just not changing their behavior. Education alone is not enough to stop the extraordinary growth of the illegal downloading practice.