Bill Gates recently predicted that online learning will make place-based colleges less significant, and five years from now, students will be able to find the best lectures in the world online. I applaud Mr. Gates. But what's taking us so long?

    As early as 1997, MIT (麻省理工) decided to post videos of all university lectures online, for free, for all people. But today, how many students have you met who mastered advanced mathematics or nuclear physics from an MIT online video? Unfortunately, the answer is not many.

    The problem is the poor quality of online education websites and the experience they provide to students. Those who go to the MIT website and watch courses online are surely very smart people, but it's not like playing a video game such as World of Warcraft. Only the most ardent students, those who are highly motivated, will devote themselves to studying these boring online videos.

    The real question is why we aren't spending more to develop better online education platforms. Where is the Avatar of education? Think about this. The market for Hollywood films per year is worth around 30 billion USD. Education in the world is a trillion-dollar-a-year market, hundreds of times bigger than Hollywood movies. Yet the most expensive digital learning system ever built cost well under 100 million dollars.

    Bill Gates' prediction is going to happen. There is no doubt about it. But it will only happen when we create high level educational content and experiences that engage and excite more than has ever been possible in the real world.

    As we age, our ability to think and remember starts to deteriorate. But not everyone. Some of us have brains that age more slowly. Enter the super-ager!

    Super-agers are people over the age of 80 who have the brain structures and abilities of much younger people. Eighty-seven-year-old Bill Gurolnick is a super-ager. “What do I feel like? If I was to give a number, I probably feel like I'm about my early 70s…”

    Scientists know that parts of the brain decrease in size with age. But in super-agers that process is much slower. Emily Rogalski is a neuroscientist at Northwestern University's Feinberg School of Medicine, in Chicago, Illinois. In a recent study, she showed that super-agers have young brains. The area of the brain responsible for attention and memory—the cortex—was shown to be thicker in super-agers. “When we look at the cortex of their brain, we see that, on average, that it looks more like a 50-year-old brain that it looks like an average 80-year-old bran…”

    Not only do super-ages have thicker cortexes, they have more spindle neurons. These large brain cells appear to be involved with social-emotional communication. But their exact purpose is still a mystery. Scientists writing for Smithsonian magazine say they are “brain cells for socializing.”

    Several factors affect how our brains age. Scientists say super-agers have several things in common, including an active lifestyle. Many travel and play sports. They are often big readers. And they usually have healthy relationships and spend time with friends. Super-agers also seem to have certain common personality traits. Rogalski says they are, for the most part, known for their optimism, resilience and perseverance. Growing old, she adds, does not have to be depressing and sad. “Perhaps, if we expected a bit better from ourselves, then we would understand that not all aging is stressful!”

    Can we all be super-agers? The science behind super-aging is a relatively new, but growing field. Scientists involved in the research offer this advice as we age: Stay active. Learn new things. Challenge yourself. Surround yourself with healthy relationships.

    A group of graduates, highly established in their careers, got together to visit their old university professor. They talked about the present-day hot topic—Happiness, but conversation soon turned into complaints about stress in work and life.

    Offering his guests coffee, the professor went to the kitchen and returned with a large pot of coffee and different kinds of cups-porcelain（陶瓷的）, plastic, glass, crystal, some plain looking, some expensive, some extremely beautiful—telling them to help themselves to the coffee.

    When all the students had a cup of coffee in hand, the professor said, “If you noticed, all the nice looking expensive cups were taken up, leaving behind the plain and cheap ones. While it is normal for you to want only the best for yourselves, that is the source of your problems and stress.”

    “Be assured that the cup itself adds no quality to the coffee. In most cases it is just more expensive and in some cases even hides what we drink. What all of you really wanted was coffee, not the cup. But you consciously went for the best cups…And then you began coveting each other's cups.”

    “Now consider this: life is the coffee; the jobs, money and position in society are the cups. They are just tools to hold and contain life, and the type of cup we have does not define, nor change the quality of life we live. Sometimes, by concentrating only on the cup, we fail to enjoy the coffee God has provided us. God brews（酿造）the coffee, not the cups…Enjoy your coffee! The happiest people don't have the best of everything. They just make the best of everything.”

    Live simply. Love generously. Care deeply. Speak kindly.

    Leave the rest to God.

    An Israeli law banning too skinny models went into effect with the start of 2013. The law, approved last March in Israel, requires models to prove they have maintained a Body Mass Index (BMI) of at least 18.5 for three months before a fashion show. That means a woman who is 68 inches tall can weigh no less than 119 pounds.

    "This law is another step in the war against eating disorders," said physician Adatto. "Underweight models," he explained, "can no longer serve as role models for innocent young people who copy their false image of being skinny."

    But some critics in this country say it is misguided, focusing on weight instead of health. They also say the Israeli ban is bound to fail because of the strong power of the fashion industry. "I think it's an approach that isn't going to work." said eating disorder expert Susan Ice, who worked with an organization which creates a healthy working environment for models.

    But Adatto told the reporter that he began to concern the issue after meeting an ambitious model who looked like she needed to be hospitalized. He said. "I realized that only legislation(立法) can change the situation. There was no time to waste; so many girls were dieting to death."

    However, the efforts to regulate models' weight in Spain and Italy have not resulted in significant changes in part because of difficulties in determining reliable methods of measuring weight and health.

    Still, folks including Ice say there's no denying that images from Hollywood and the fashion industry can be difficult for young women to deal with. "Certainly I don't believe the modeling industry has caused the rise in eating disorders, but it makes it harder," she says. "It's a difficult recovery environment, worshiping thinness as the beauty ideal."

    Pablo Picasso was an amazing painter who experimented with colour and shape. Picasso wanted to find ways to paint emotions. His paintings opened people's minds and showed there were many ways to express ideas.

    Born in Spain in 1881, Picasso learned to paint at an early age because his father was a painter. At fourteen, Picasso began attending the Academy of Fine Arts in Barcelnoa. Although Picasso did well, his teacher wouldn't let him develop his own style. So he change schools. Though his new teachers praised his work, they still criticized it as being too different. Picasso made up his mind to express himself in his own way.

    Disappointed with his career in Spain, nineteen-year-old Picasso moved to Pairs, where he learned about abstract art. He started copying famous paintings so he could paint in any style. However, an important development in his own style came along when his best friend committed suicide（自杀）. Picasso was so upset that he painted only in blue and gray. He painted the poor and the disabled. This is known as his "Blue Period".

    In 1904, his painting style changed again when he fall in love with an artist's model. He began painting everything with colors of rose, red and pink. He mainly painted artists during this time, called his "Rose Period."

    Picasso's style went through style change as he began to learn African art and geometry（几何学）. Instead of painting with different colors, he used different shapes. His paintings made people surprise because they looked like they had been broken and put back together incorrectly. Everything was geometric and abstract. Picasso's new style became known as "Cubism." Cubism was so unique it became very popular.

Pablo Picasso in most remembered for his Blue, Rose, and Cubist periods. But Picasso never stopped experimenting with painting. His painting styles kept changing until his death at the age of ninety-two.

In 1835, William Talbot finally succeeded in producing a photograph of his country house. He declared that his was the first house ever known to have drawn its own picture. The drawing was formed "by the action of light upon sensitive paper." Photography offered nature a "pencil" to paint herself through optical （光学的） and chemical means alone.

By the mid-nineteenth century, people no longer needed to hire a draftsman to draw detailed images because the process could be completed instantly with a camera. Advocates for the technology stated that not only was it more precise than the human hand-it was faster and cheaper.

The removal of human fallibility in the creating process was one of photography's biggest selling points, but this also started debates about the new medium's implications for visual culture. Could images made largely by a machine be considered art? If so, where did human creativity, fit in this process?

As the twenty-first century becomes increasingly automated （自动化的）, more and more people attempt to identify where human agency exists in the technologically driven world. Images generated with artificial intelligence by companies like OpenAI are stimulating questions like those that emerged with the coming of the photograph. By typing a sentence, users can generate "new" images composed from images collected across the internet. The result has been a flood of Al-generated images in places that are previously unique to human authors. Painting competitions, commercial graphic design and the fashion of portraiture（肖像） have all since collided with the technology in troubling ways.

The fine arts were thought to be a final hold-out of human creativity, but the surprisingly high quality of Al-generated images is producing deeper questions about the nature of originality. If the history of photography tells us anything, it's that the debate won't be settled quickly; straightforwardly or by the institutions we typically associate with cultural gate-keeping.