According to sociologists(社会学家), every modern industrial society has some form of social stratification(阶层). Class, power and status are important in deciding people's rank in society.

    Class means a person's economic position in society. A commonly used classification is lower class, middle class and upper class. While sociologists disagree on how these terms should be exactly defined, they do describe societies like the United States quite well. One study shows that 53% of Americans belong to the lower class, 46% the middle class, and 1% the upper class. Interestingly, a surgeon earning $500,000 a year and a bus driver earning $50,000 a year both regard themselves as the middle class!

    Power refers to the amount of control a person has over other people. Obviously, people in positions of great power (such as governors) exercise(行使)big power, but people who take orders from others have less power. Power and class do not always go hand in hand, however. For example, the governor of a state has great power, but he or she may not belong to a corresponding (相应的)economic class. Generally, however, there is a relationship between power and class. To our knowledge, there aren't too many people who aren't millionaires in the U．S. Senate!

    Status is the honor or respect attached to a person's position in society. It can also be affected by power and class, but not necessarily so. For example, a university professor may have a high status but not belong to a high social class or have a lot of power over others.

    The organic food has gained a lot of [popularity as they are being considered as healthier and tastier.  A fair number of people advocate a large-scale shift to organic farming from conventional agriculture. But this might not seem well-founded.

    Since the mid-19^th century, conventional industrial agriculture has become incredibly efficient on a simple land to food basis. Conventional farming gets more and more crop per square foot of land, which can mean less wilderness needs to be transformed to farmland.

    To make farming more efficient, conventional agriculture uses a significant amount of synthetic fertilizer（合成肥料）each year, and all that nitrogen（氮）enables much faster plant growth. However, the cost is paid in vast polluted dead zones at the months of many of the world's rivers, because much of the nitrogen ends up running off the soil and into the oceans. This also makes conventional farming one of the major threats to the environment.

To weaken the environmental impact of agriculture, improve soil quality as well as produce healthier foods, some farmers have turned to organic farming. Environmentalists have also welcomed organic food as better for the planet than the food produced by agricultural corporations. Organic practices — refusing artificial fertilizers and chemical pesticides –are considered far more sustainable. Sales of organic food rose 7.7% in 2010, up to $26.7 billion—and people are making those purchases for their moral senses as much as their tongues.

    Yet a new meta-analysis in Nature does the math and comes to a hard conclusion: organic farming produces 25% fewer crops on average than conventional agriculture.

    In the Nature analysis, scientists performed an analysis of 66 studies comparing conventional and organic methods across 34 different crop species, from fruits to grains. They found that organic farming delivered a lower output for every crop type, though the difference varied widely. For crops like fruit trees, organic trailed（落后于）conventional agriculture by just 5%. Yet for major grain crops and vegetables – all of which provide the world's main calories – conventional agriculture outperformed organics by more than 25%.

    What that means is that while organic farming may be more sustainable than conventional agriculture, there are trade-offs（此消彼长）with each. So an ideal global agriculture system may borrow the best from both systems rather than upholding merely organic or conventional practices.

    We all know the names of certain famous male inventors throughout history, from Galileo to Alexander Graham Bell to Steve Jobs. Do you know the outstanding ladies listed below?

    Margaret Knight (1838-1914)

    Margaret Knight was nicknamed “the lady Edison'' for her productive inventions which included a safety device for textile looms, shoe manufacturing machines, a rotary engine and internal combustion engine (内燃机), among many others. Knight received 27 patents in her lifetime.

    Josephine Cochran(1839-1913)

    Cochrane, a wealthy woman who entertained often, wanted a machine that could wash dishes faster than her servants, and without breaking them. When she couldn't find one, she built the first dishwasher herself in 1886. She received a patent for her famous invention and started a company to sell her invention to restaurants and hotels.

    Katharine Burr Blodgett (1898-1979)

    Katharine Blodgett was the first woman to receive a Ph.D in physics at England's Cambridge University and the first woman hired by General Electric. Her most influential invention was non-reflective glass, which today is still essential for eyeglasses, car windshields and computer screens.

    Stephanie Kwolek (1923-2014)

    In 1965, Stephanie Kwolek created an unusually lightweight and durable new fiber which was later developed by a chemical company DuPont into the synthetic Kevlar (凯夫拉尔纤维), used in everything from military helmets and bulletproof vests to work-gloves, sports equipment, and building materials. Kwolek was awarded the National Medal of Technology for her research on synthetic fibers and was admitted into the National Inventors Hall of Fame in 1994.

    1990 was a significant year in world events. In February, Nelson Mandela was set free after 27 years in prison. In October, East and West Germany became one country again. Then at the end of 1990, the World Wide Web was born. For this final event we have one man to thank, Tim Berners-Lee, the father of the Web.

    Berners-Lee was born on June 8, 1955 in London, England. His parents, both computer designers, encouraged him to think and work creatively as he grew up. He was an excellent student and naturally took an interest in computers and science.

    After graduating from Oxford University, Tim went to work at a science research center in Switzerland. There he developed some of the different systems that would later become the Web. The first was HTML, the computer language used to make web pages. The second was an address system that let computers anywhere find each other and send and receive information. In 1990, while still at the science center in Switzerland, he put them together to make the first Internet browser. It could run on any computer and allowed people to share their information with the rest of the world.

    Tim knew that the more people used the Web, the more useful it would be. He wasn't interested in money but knowledge, so he gave out his invention for free to anyone who was interested. Many were interested and the growth of the Internet began.

    Today Tim works as a professor at the MIT in America, researching new and interesting ways to use the Web. He has received many awards from governments and organizations for his efforts. He is still not very interested in money. That is why he is so admired by his students and workmates. It may also be one of the reasons why few people outside the world of technology know his name.

    Despite what so many people would love to believe, NASA hasn't discovered any evidence of past or present intelligent life on Mars. So, when the Curiosity rover (好奇号探测器）found something suspicious on the Red Planet's surface, they were not only surprised but also a little bit worried.

    The thin fragment (碎片）was suspicious enough to guarantee its own name, with NASA's Curiosity rover team calling it the “Pettegrove Point Foreign Object Debris,” named for the location where it was discovered. With no idea what it was or where it came from, the rover s handlers began to worry that it might actually be a piece of the rover itself, suggesting some unseen damage or other issue with the robot. Thankfully, those concerns seem to have been unfounded.

    In a new update from NASA the object has now been identified as a natural piece of rock rather than a piece of any man-made craft or vehicle. The team analyzed the bizarre object with a tool called the ChemCam RMI. The instrument uses a laser (激光器）t0 sniff out the makeup of anything it's pointed at, and the results for this particular piece of debris revealed that it's actually just a very thin piece of rock.

    NASA describes the inspection： The planning day began with an interesting result from the previous plan's ChemCam RMI analysis of a target that was referred to as “Pette Point Foreign Object Debris” （PPFOD),and speculated to be a piece of spacecraft debris fact was found to be a very thin flake of rock, so we can all rest easy tonight-Curi0sity n0t begun to shed its skin!

    How this particularly thin sliver of rock got to where it is—and why it seems to be a different colour than the surrounding sand and debris-remains unexplained, but at least the rover falling apart.

    To ensure an excellent experience during your tour of the Mark Twain House, here are some guidelines and general information:

The House is Shown Only by Guided Tour.

    To ensure an optimum (最佳) experience, house tours are limited to 14 people, first-come, first-served. If your group has more than 10 people, call (860) 280-3130 to reserve a discounted group tour in advance of your visit. If you have a party of fewer than 10 people feel free to purchase tickets online: We will hold them at Will Call. The tour schedule is usually online about a month in advance.

Our site is made up of three buildings

    The Webster Bank Museum Center at the Mark Twain House & Museum is always your first and last stop as it houses our ticket counter, museum store, film, exhibits and cafe. All tours gather in the museum center before heading over to Mark Twain's historic 1874 home. Mark Twain's historic carriage house is the third building on our property, but is generally not open to the public. The hayloft (干草棚) has been repurposed into offices and the main floor of the barn is a space available for rent for parties and meetings.

Coupons & Discounts

    The Mark Twain House offers only a few coupons and discounts. The price you pay for admission helps us maintain the beauty of this icon of American architecture. If you are lucky enough to find one of those special offers online or at your local library, keep in mind they are good only for the general Mark Twain House Tours. No passes or discounts may be applied to our specialty tours.