Scientists have found living organisms trapped in crystals(晶体) that could be 50,000 years old.

     The organisms were found in a hot, but beautiful cave system in Naica, Mexico. These ancient life forms can be seen only with a microscope. Penelope Boston, who leads the Astrobiology Institute at NASA, the space agency of the United States, says the ancient microbes(微生物) were able to live by eating minerals such as iron.

     She spoke about the discovery recently at a meeting of the American Association for the Advancement of Science. If the findings are confirmed, they will show how microbes can survive in extreme conditions. Forty different kinds of microbes and some viruses were found in the underground area. The genetic structures of these organisms are 10 percent different from those of their nearest relatives.

     The caves in Naica are 800 kilometers deep. They were once used for mining lead. Before the miners began working in the caves, the area was separated from the surface and the outside world. Some of the caves are as big as the large religious centers built during Europe's Middle Ages. There are crystals covering the walls. The caves are so hot that scientists must wear special clothing to keep cool. The clothing keeps the crystals safe from human germs（病菌）or other damage. Boston said the researchers could only work for about 20 minutes at a time before they had to go to a room that was 38 degrees Celsius to cool down.

     NASA officials would not let Boston share her findings with scientific experts before last week's announcement. So scientists could not say much about the findings. But Norine Noonan, a biologist with the University of South Florida, said she believed them. "Why are we surprised?" Noonan asked. "As a biologist, I would say life on Earth is extremely tough and extremely colorful."

     Boston is also studying microbes commonly found inside caves in other countries, such as Ukraine and the United States. These microbes appear to be impossible to kill. Boston said they show how difficult life on Earth can be.

How to Make Friends

    Friendship is a very important human relationship and everyone needs good friends. Good friendship has many benefits. If offers companionship, improves self-worth and promotes good health. There are times in our lives such as when we have recently moved into a new town, or changed our jobs or schools. Such changes often leaves us without a friend.{#blank#}1{#/blank#}. But for many of us the process is difficult and requires courage. Below are some helpful suggestions on how to make and keep friends.

1）Associate with others.

    The first step to making friends is associating with other people. You can go to public places to meet new people. Besides, you will need to make yourself known by becoming an active member of such places.

2）Start a conversation.

    Starting a conversation is the second most important step in making new friends.{#blank#}2{#/blank#} You can always start the conversation. Being able to make small talk is a very useful skill in relating with other people.

3）{#blank#}3{#/blank#}

    Choosing friends with common interests is important in building friendship as these interests would always bring you and your friend together. Hanging out will always be a pleasant experience.

4）Let it grow.

    It is a good thing to stay in touch. However, try not to press your new friend with calls, messages or visits as this would likely wear him or her out and finally you may lose your friend.{#blank#}4{#/blank#}. The best friendships are the ones that grow naturally.

5）Enjoy your friendship.

    The best way to enjoy your friendship is to allow your friends to be themselves.{#blank#}5{#/blank#} Try not to change them from who they are to what you want them to be.  Become the kind of friend you will want your friend to be to you.

A. Be cheerful.

B. So you will need to give your friend time to react to you.

C. Making new friends comes easy for some people.

D. For a friendship to develop you need to stay in touch.

E. Do not wait to be spoken to.

F. Try not to find fault with your friends.

G. Do things together.

    Why do Americans struggle with watching their weight, while the French, who eat rich food, continue to stay thin? Now a research by Cornell University suggests how life style and decisions about eating may affect weight. Researchers concluded that the French tend to stop eating when they feel full. However, Americans tend to stop when their plate is empty or their favorite TV show is over.

    According to Dr. Joseph Mercola, a health expert, the French see eating as an important part of their life style. They enjoy food and therefore spend a fairly long time at the table, while Americans see eating as something to be squeezed (挤进) between the other daily activities. Mercola believes Americans lose the ability to sense when they are actually full. So they keep eating long after the French would have stopped. In addition, he points out that Americans drive to huge supermarkets to buy canned and frozen foods for the week. The French, instead, tend to shop daily, walking to small shops and farmers' markets where they have a choice of fresh fruits, vegetables, and eggs as well as high-quality meats for each meal.

    After a visit to the United States, Mireille Guiliano, author of French Women Don't Get Fat, decided to write about the importance of knowing when to stop rather than suggesting how to avoid food. Today she continues to stay slim and rarely goes to the gym.

    In spite of (尽管) all these differences, evidence shows that recent life style changes may be affecting French eating habits. Today the rate of obesity (肥胖)—or extreme overweight — among adults is only 6%. However, as American fast food gains acceptance and the young refuse older traditions, the obesity rate among French children has reached 17% — and is growing.

    Being the head of a high school for many years, I grew tired of budget meetings, funding cuts, and many other administrative chores. I started to dream of retirement. Sitting in traffic on a weekday morning, I would find my mind wandering. I would imagine spending time with my grandchildren, quiet evenings with my wife, traveling, or rediscovering some great books. I told myself that I wouldn't sign myself up for any committees, any classes, or anything requiring a schedule.

    My first day of retirement came at last! I cooked a great breakfast for my wife and me, leisurely read the paper, cleaned a bit of the house, and wrote a few letters to friends. On the second day, I cooked breakfast, read the paper … On the third day. This is retirement? I tried to tell myself that it was just the transition, that those golden moments were right round the corner, and that I would enjoy them soon enough. But something was missing.

    A former colleague asked a favor. A group of students was going to Jamaica to work with children in the poorest neighborhoods. Would I interrupt my newly found “happiness” and return to the students, just this once? One trip. That's all. My bags were packed and by the door.

    The trip was very inspiring. I was moved not only by the poverty I saw but also by the sense of responsibility of the young people on the trip. When I returned home, I offered to work one day a week with a local youth organization. The experience was so positive that I was soon volunteering nearly full-time, working with students across North America to assist them in their voluntary work.

    Now, it seems, the tables have turned. Some days I am the teacher, other days I am the student. These young people have reawakened my commitment to social justice issues by challenging me to learn more about the situation in the world today, where people are still poor and suffer because of greed, corruption and war. Most importantly, they have given me the opportunity to continue to participate in helping to find solutions. In return, I help them do their charitable projects overseas. I've gone from running one school to helping oversee the construction of schools in twenty-one countries!

    The new president of Harvard University is the son of an Eastern European refugee and Auschwitz (奥斯威辛) survivor—Lawrence S. Bacow. His father worked full time while attending a state college in Detroit at night to earn his degree.

    Bacow, the former president of Tufts University, has taken over Harvard at a time when higher education is under attack for being financially out of reach to many Americans. But Bacow said his family's journey had reflected the power of college education to transform generations and the opportunities that have historically been available in the United States.

    "My parents came to this country with almost nothing," Bacow said. "I wouldn't be here if this country had not been open to people like my parents at that time. Nor would I if my father hadn't had the opportunity to get the college education."

    Bacow grew up in Pontiac, Michigan. His father's family fled anti-Jewish (反犹太的) violence in Minsk, then part of the Soviet Union, before the start of World War II and went to the United States. His mother arrived in Brooklyn at age 19, having survived Auschwitz concentration camp. She was the only Jew from her town to have survived the war. Yet Bacow, who is married with two sons, said that while growing up in Michigan, he had a happy childhood, entering science fairs as a child and building radios like his dad.

    Bacow has spent most of his professional career at MIT, Harvard and Tufts. He was a professor of environmental studies at MIT, and later a principal at the university. He led Tufts from 2001 to 2011. At Tufts, Bacow earned a reputation for shaking up a sleepy university that was being overshadowed by its peers in Boston. He is also credited with leading it through both 9/11 and the 2008 financial crisis.

    As the Tufts president, Bacow traveled around the country, reaching out to alumni (校友), and he urged his faculty and deans to do the same, in an effort to boost donations to finance Tufts' academic ambitions. He raised more than $20 million for faculty recruitment, attracting up-and-coming professors by offering junior faculty perks (福利), such as long academic leaves that they couldn't get elsewhere.

    Under Bacow's leadership, Tufts spent millions on labs and libraries. He also made addresses nationally about the need to make higher education more accessible and affordable to low-income students.

Something Fun

    A person is on trial for murder in a court room in Oklahoma. There is strong evidence indicating that he is guilty（有罪的）. However, the body is not found.

    In the defense's (辩护方) closing speech, the lawyer, knowing that his client (委托人) is guilty and that it looks like he'll probably be seriously punished, decided to play a clever trick.

    "Ladies and gentlemen of the jury (陪审团), I have a surprise for you all," the lawyer says as he looks at his watch. "Within one minute, the person assumed dead in this case will walk into this court room," he says and he looks towards the court-room door. The jury, somewhat surprised, looks at the door eagerly. A minute passes. Nothing happens.

    Finally the lawyer says, "Actually, I made up the previous statement. But you all waited with expectation. I, therefore, put it to you that there is a reasonable doubt in this case as to whether anyone was killed and insist that you pass a judgment of not guilty."

    The jury, clearly confused, back off to discuss.

    A very few minutes later, the jury returned and one of them pronounces a verdict (裁决) of guilty.

    "But how?" asks the lawyer in surprise  "You must have had some doubt; I saw all of you stare at the door."

    Answers the jury member, "Oh, we did look. But your client didn't."