Campers Gene and Marie Marsden took pride in being good citizens when in the wild. While driving miles to the Green River Lakes area, they taught their children what they had learned in the bear safety handbook put out by the Bridger-Teton Forest Service.

    Mr. and Mrs. Marsden did their best to keep a tidy camp. As the handbook had said to hang all food at least ten feet off the ground and four feet out from the trees, they did that and locked their food in their trailer(拖车) at night. It was already dark when they went to bed, but they perused the campsite with flashlights, making sure nothing was left out. Following the bear book's advice, they slept a hundred yards from where they cooked their food, and kept the car near their tents, separated from the trailer, which they left up at the other camp.

    The Marsdens liked having their dog Spike on guard. But on the first night, Spike would not stop barking. When Marie Marsden pulled the tent open and shone her flashlight, she saw a young bear.

    They all piled into the car and drove quickly down the path, calling out of the window to Spike and abandoning the trailer. They drove to a pay phone and called a Fish and Game Department guard, who identified the bear by the white ring of the fur the Marsdens had seen around his neck. The authorities informed the Marsdens that the bear was a young male that they'd been keeping an eye on.

    The next morning, the Marsdens heard helicopters circling over the mountain and wondered if it might have something to do with the bear.

    After spending the night in the public campground, they drove back to their site. Wandering the area in search of clues, Marie came to a stop below a tall tree. She slapped her head and shouted, “Oh no!”

    “What is it?” Gene asked.

    Marie pointed at the ground where Spike's dog food bowl lay upside down. A week after their return home, the Marsdens read the headline in their local paper. “Bear Killed in Wind Rivers.” According to the article, the Fish and Game Department had shot the young bear because, having been rewarded for invading(侵入) a human campsite, it would likely to do so again.

    The Marsdens knew they had been lucky in the encounter, yet much to their shame and sadness, they also knew that the bear had not.

    We can achieve knowledge either actively or passively. We achieve it actively by direct experience, by testing and proving an idea, or by reasoning.

    We achieve knowledge passively by being told by someone else. Most of the learning that takes place in the classroom and the kind that happens when we watch TV or read newspapers or magazines is passive. Conditioned as we are to passive learning, it's not surprising that we depend on it in our everyday communication with friends and co-workers.

    Unfortunately, passive learning has a serious problem. It makes us tend to accept what we are told even when it is little more than hearsay (传闻) and rumor.

    Did you ever play the game Rumor? It begins when one person writes down a message but doesn't show it to anyone. Then the person whispers it, word for word, to another person. Thai person, in turn, whispers it to still another, and so on, through all the people playing the game. The last person writes down the message word for word as he or she hears it. Then the two written statements arc compared. Typically, the original message has changed.

    That's what happens in daily life. The simple fact that people repeat a story in their own words changes the story. Then, too, most people listen imperfectly. And many enjoy adding their own creative touch to a story, trying to improve on it, stamping it with their own personal style. Yet those who hear it think they know.

    This process is also found among scholars and authors: A statement of opinion by one writer may be restated as fact by another, who may in turn be quoted by yet another; and this process may continue, unless it occurs to someone to question the facts on which the original writer based his opinion or to challenge the interpretation he placed upon those facts.

    Michelin inspectors, the super secret spies of the restaurant industry, are the anonymous (匿名的) keepers of the famous Michelin star rating. They've been writing anonymous reports of restaurants for over 100 years.

    “We say it's a little like the CIA,” said inspector “M” with a laugh. She asked that her identity not be revealed. “My whole life is staying under the radar, staying away from cameras, using fake names, trying to steal in and out of restaurants quietly.”

    Along with their boss, Jean Luc Naret, the director of the Michelin Guide, about 90 inspectors around the world decide which restaurants will win the cooking equivalent (等价物) of an Oscar, the Nobel Prize and Megamillions jackpot (百万彩票) all at once. The Michelin Guide covers 23 countries, and out of the 45,000 rated restaurants, less than 100 have the top rating — only nine American restaurants carry three stars.

    If the name “Michelin” brings the tires on your car to mind, you're not too far off. The Michelin rating began in France in 1900 as a marketing trick. The Michelin brothers thought their customers would bum more rubber if given a list of hotels and restaurants to explore.

    Inspector “M” admitted being an inspector leads to a lonely dining life. “Most of the time we dine alone,” she said. “It gives us the ability to really focus on the food and the atmosphere and capture the entire experience.” To cover their tracks, “M” said sometimes two inspectors will dine together and write two separate papers. It's better than saying “table for one”, right?

    “When you're really, really into food and very crazy about food, everything else that's going on around you isn't so important,” she said.

    Melissa Poe was 9 years old when she began a campaign for a cleaner environment by writing a letter to the then President Bush.Through her own efforts,her letter was reproduced（复制）on over 250 donated billboards（广告牌）across the country.

    The response to her request for help was so huge that Poe established Kids For A Cleaner Environment(Kids F.A.C.E.) in 1989. There are now 300,000 members of Kids FACE worldwide and is the world's largest youth environmental organization.

    Poe has also asked the National Park Service to carry out a "Children's Forest" project in every national park. In 1992, she was invited as one of only six children in the world to speak at the Earth Summit in Brazil as part of the Voices of the Future Program. In 1993, she was given a Caring Award for her efforts by the Caring Institute.

    Since the organization started, Kids F.A.C.E.members have distributed and planted over 1 million trees! Ongoing tree-planting projects include Kid's Yards—the creation of backyard wildlife habitats and now Kids F.A.C.E.is involved in the exciting Earth Odyssey, which is a great way to start helping.

    "Starting the club turned out to be a way to help people get involved with the environment. Club members started doing things like recycling, picking up litter and planting trees as well as inviting other kids to join their club."

    "We try to tell kids that it's not OK to be lazy," she explains. "You need to start being a responsible, environmentally friendly person now, right away, before you become a resource-sucking adult."

    UK is becoming a popular destination for people who wish to study abroad. However, Britain is quite an expensive place to study and live in. Tuition fees have now reached £ 9,250 a year and students also face some of the highest living costs in the world.

    Fortunately, there are a number of countries where universities offer degree programs entirely in English, along with the chance to learn the local language while you live there. Here are three of the options.

    Tianjin University

    Moving to China is not for the faint hearted. Undergraduate degree courses at Tianjin last four years. Living costs are only around £ 400 a month and tuition fees are £ 2,300 a year. Flights will cost £ 3,600 over the four years. The total cost, at £ 28,800, is still around half that of a three-year degree in Britain. Tianjin is one of the world's latest cities and is only a half-hour train ride from Beijing. Three undergraduate programs are offered in English: Chemical Engineering, Environment & Energy and Pharmaceutical Science.

    University of Amsterdam

    The Dutch capital is not a cheap city to live in, but standard tuition fees of £ 1,800 a year make it significantly cheaper than a British degree. There are 14 bachelor's degrees on offer that are taught in English, including Political Science, Economics & Business Economics and Actuarial Science. Nearly all Dutch people speak English, making it an easy country to get by in.

    University of Milan

The University of Milan's fees range from £ 140 to £3,650 a year. The one bachelor's degree offered entirely in English—Political Science is a three-year course. While living costs in Milan are high, the significantly lower fees make it a cheaper option than a British university.

    Barbara McCintock was one of the most important scientists of the twentieth century. She made important discoveries about genes(基因) and chromosomes (染色体).

    Barbara McClintock was born in 1902 in Hartford, Connecticut. Her family moved to Brooklyn area of new York City in 1908.Barbara was an active child with interests in sports and music. She also developed an interest in science.

    She studied science at Cornell University in Ithaca, New York. Barbara was among a small number of undergraduate students to receive training in genetics in 1921. Years later, she noted that few college students wanted to study genetics.

    Barbara McClintock decided to study botany, the scientific study of plants, at Cornell University. She completed her undergraduate studies in 1923. McClintock decided to continue her education at Cornell. She completed a master's degree in 1925. Two years later, she finished all her requirements for a doctorate degree.

    McCintock stayed at Cornell after she completed her education. She taught students botany. The 1930s were not a good time to be a young scientist in the United States. The country was in the middle of the great economic Depression. Millions of Americans were unemployed. Male scientists were offered jobs. But female geneticists were not much in demand.

    An old friend from Cornell, Marcus Rhoades, invited McClintock to spend the summer of 1941 working at the Cold Spring Harbor Laboratory. It is a research center on Long Island, near New York City. McClintock started in a temporary (临时的) job with the genetics department. A short time later, she accepted a permanent (永久的) position with the laboratory. This gave her the freedom to continue her research without having to teach or repeatedly ask for financial aid.

    By the 1970s, her discoveries had had an effect on everything from genetic engineering to cancer research. McClintock won the Nobel Prize for Physiology or Medicine in 1983 for her discovery of the ability of genes to change positions on chromosomes. She was the first American woman to win an unshared Nobel Prize.