The United States has always been a country of many cultures. Before Europeans came to North America, many groups of Native Americans lived here. Different Native American groups had different cultures. The first Europeans in the United States were from England and Holland, but immigrants came from all European countries. Many people also immigrated from Asia and Africa. Sadly, many Africans were brought to the United States as slaves. Many immigrants come from Latin America too. Today, the United States has people from more cultures than ever.

    In the 19th century, people spoke of the United States as a “melting pot.” People thought that all immigrates should forget their native cultures and languages and become English-speaking Americans. They felt that people should assimilate-join American culture. However, not everyone wanted to assimilate completely. Many people tried to keep parts of their cultures, such as foods, customs, and languages. However, their children often forgot their parents' or grandparents' language. But most Americans, even those whose families have been here a long time, can tell the countries their relatives came from. And of course, new immigrants take great pride in their curare and language.

    For all of these reasons, melting pot is no longer a good way to describe the United States. Instead, people now call the United States a “salad bowl.” They say salad bowl because in a salad, you can still see all of the individual parts (lettuce, tomato, and so on), but all the different parts mixed together and begin to take on the flavor of one another.

    Changing technology stimulates (刺激) the brain and increases intelligence. But that may only be true if the technology challenges us. In a world run by intelligent machines, our lives could get a lot simpler. Would that make us less intelligent?

    After the Industrial Revolution, machines began to replace manual workers. The process played out in agriculture as well as manufacturing so that groups of agricultural workers were replaced and forced to move to cities to make a living.

    When machines took away much of the manual work, people became less physically active and gained weight. The sedentary (久坐的) lifestyle contributed to a worldwide spreading of overweight and related metabolic disorders such as heart disease, secondary diabetes and kidney disease .

    As our bodies rested, our brains were forced to work harder, however. It is much more difficult to drive through an overcrowded modern city than it is to move around in a small rural village, for instance. Modern jobs are also more complex and urgent and they require more education because employees need to process new information quickly. Even during our leisure time, our brains work harder due to greater availability of books and explosion of audiovisual media, for entertainment, study, music, news, and so forth.

    Now in the Internet age, the amount of information grows fast along with the advance of electronic technologies. The number of people with whom we interact electronically grows by leaps and bounds thanks to the ease of use of social media like Facebook and Twitter.

    All of this extra work for our brains makes us more intelligent. That helps explain why human intelligence increases steadily from generation to generation in all developed countries, a phenomenon named the Flynn Effect. Of course, there are other reasons, including improved nutrition, better medical practices that reduce brain damage, and improved sanitation and public health that reduce diseases of childhood.

    In the P.G Wodehouse novels, Bertie Wooster got away with being a fool because Jeeves was there to back him up with superior brain power. Similarly, people of the future are at risk of being less intelligent because machines will do their thinking for them.

    Artificial intelligence is taking over many human jobs. For instance, planes are being flown much of the time by automatic pilots. Moreover, the complex problem of controlling air traffic around large modern airports is also achieved by artificial intelligence that operates well beyond the capability of mere human air traffic controllers.

    Artificial intelligence exists in many fields of modern life for the simple reason that intelligent machines can already outperform humans, including some aptitudes (天资) which were once thought to be a human advantage, such as playing chess or recalling details in a game of Jeopardy.

    Machine intelligence is increasing much faster than human intelligence. As machines get smarter, they will do more of our thinking for us and make life easier.

    Instead of struggling to identify ourselves to some electronic system via passwords that are secure only if they are hard to remember, the system will work harder to identify us using biometrics (生物测定学) such as fingerprints or even the individual sound of our hearts. More technologies of the future may also be voice-activated so that we will talk with machines much as we would talk to a friend.

    In the future, the electronic assistant will develop to the point where it serves similar functions as a real living chief male servant of a house, fulfilling requests such as: “Organize a dinner party for six on Thursday, Jeeves, and invite the usual guests .”

    At that point, our long struggle with challenging technologies is at an end. Like Bertie Wooster, we can take it easy knowing that the hard work of planning and organizing is being done by a better brain—the electronic assistant. Starved of mental effort, our brains will return to an earlier or less advanced form.

    The future is still in the fog.

    Not sure what gift to get your loved ones? Think technology! You may even find something special for yourself!

    Mini Quadcopter

    Would you like to have a flying toy, but lack space to fly one? Consider a Mini Quadcopter that is small enough to fit inside your hand. This Mini Quadcopter can be controlled to fly in any direction with its remote control. The Mini Quadcopter is available from Hammacher Schlemmer for $39.95.

    Selfie Toaster

    Does your sweetie like taking selfies and eating toast? Well, why not combine the two with the Selfie Toaster? The Selfie Toaster crates an image on the piece of toast so you can smile at yourself every morning. The Selfie Toaster is available from Etsy for $10.95.

    Amazon Echo

    Give the knowledge of the world with the Amazon Echo.

    The advice can answer questions, tell you about weather conditions, tell jokes, play music and more. The Echo also acts as a Bluetooth speaker so you can connect your phone and listen to your favorite songs. The Echo is available from Amazon for $179.

    Indoor Snowfall Light

    Get into the spirit of the holiday season in your home with the Indoor Snowfall Light. The light shows snowflake shapes in your room to give you the feeling of a winter snowfall. You can control the speed of the snowfall, unlike the real whether. The Indoor Snowfall Light is available from Sharper Image for $59.99.

SECONDARY PROGRAMS & RESOURCES

    How's your happiness quotient (指数)? Science tells us that if you want to increase your "happiness quotient" every day, it's important to take time and accept the present blessings (恩赐) in your life.

    I wanted to share a moment of feeling about some of my blessings and what's in my life to be grateful for as Thanksgiving approaches.

    One of our family traditions at our Thanksgiving meal is to go around the table and to let each one share something we're especially thankful for.

    I'm going to recite lots of things, including that I'm grateful for my health, my loving husband, and the wonderful relationship we share. My husband joins me for 3-mile walk to start our day. The exercise habit keeps our moods in check and the ups and downs of life easier to manage. We talk as we walk, sharing ideas, worries and good feelings too. Sometimes we argue a little until we figure out what to do. We always come up with something. What a blessing that is!

    It is so much to be grateful for. I feel I am the luckiest woman alive. It's my wish for you that you'll be able to spot something in your life. I hope yet you will savor (体味) and appreciate it.

    Many of us spend the holiday with our aging parents or other loved ones. In my work at AgthgParents.com, we just reminded everyone that you never know if there will be another Thanksgiving with these loved ones. We can't take the day for granted. Just be in the moment. We suggest that you verbally give thanks to your parents, no matter what conditions your aging parents may be in now. Do what you can to be tuned in to what you need as well as what your family needs.

    Albert Einsein said," Only a life lived for others is worth living."

How does this job offer sound? You'll need to be available on short notice，including late at night and on weekends. You could be asked to do anything from helping at community events to responding to life-threatening emergencies (sometimes putting your own safety at risk). This job also involves a lot of regular training. Oh, and you won't be paid for any of this. Would you take the job?

    This job might not necessarily appeal to everyone, but if this sounds like an opportunity you'd eagerly accept，then you'd fit right in with Western Australia's 26,000 emergency service volunteers. The emergency services aren't the only industry benefiting from volunteers. Across both Australia and America, between a quarter and half of the population volunteer each year in areas including education, sports, health, religion, and social services.

    What motivates people to volunteer? Yes, volunteers don't get paid. But it doesn't mean people don't get benefits from volunteering. Indeed, research shows there are significant mental health benefits coming with volunteering. It can be a means to make new friends, build new skills or try things out of your comfort zone. It can also be a means to help loved ones. A case is someone close to me who recently lost her husband to a disease. When her husband was admitted to a nursing facility, she decided to volunteer for the patient advocacy committee. She found great support and felt she could make a difference in the lives of the patients. After her husband's passing, she decided to continue volunteering for the committee not only as a way to show gratitude for the great care her husband received but also because she made friends there. She found a way to put her career skills to use for the common good and keep active after retirement.

    There are countless ways to volunteer. No matter how you do it, it is definitely worth every minute you put into it.