Computers have beaten human world champions at chess and, earlier this year, the board game Go. So far, though, they have struggled at the card table. So we challenged one AI to a game.

    Why is poker(扑克) so difficult? Chess and Go are “information complete” games where all players can see all the relevant information. In poker, other players' cards are hidden, making it an “information incomplete” game. Players have to guess opponents' hands from their actions—tricky for computers. Poker has become a new benchmark for AI research. Solving poker could lead to many breakthroughs, from cyber security to driverless cars.

    Scientists believe it is only a matter of time before AI once again vanquishes humans, hence our human-machine match comes up in a game of Texas Hold's Em Limit Poker. The AI was developed by Johannes Heinrich, researcher studying machine learning at UCL. It combines two techniques: neural(神经的) networks and reinforcement learning(强化学习).

    Neural networks, to some degree, copy the structure of human brains: their processors are highly interconnected and work at the same time to solve problems. They are good at spotting patterns in huge amounts of data. Reinforcement learning is when a machine, given a task, carries it out, learning from mistakes it makes. In this case, it means playing poker against itself billions of times to get better.

    Mr Heinrich told Sky News: “Today we are presenting a new procedure that has learned in a different way, more similar to how humans learn. In particular, it is able to learn abstract patterns, represented by its neural network, which allow it to deal with new and unseen situations.”

    After two hours of quite defensive play, from the computer at least, we called it a draw.

    Generally speaking, college graduation brings both the satisfaction of academic achievement and the expectation of a well-paid job. But for 6,000 graduates at San Jose State this year, there's uncertainty as they enter one of the worst job markets in decades.

    Ryan Stewart has a freshly minted degree in religious studies, but no job prospects. “You look at everybody's parents and neighbors, and they're getting laid off and don't have jobs,” said Stewart. “Then you look at the young people just coming into the workforce.., it's just scary.”

    When those graduates entered college, the future never looked brighter. But in the four years they've been here, the world outside has changed dramatically. “Those were the exciting times, lots of dot-com opportunities, exploding offers, students getting top dollar with lots of benefits,” said Cheryl Allmen-Vinnidge, of the San Jose State Career Centre. “Times have changed. It's a new market. The job situation is grim (严峻的) now.” Cheryl Allmen-Vinnidge ought to know. She runs the San Jose State Career Centre, (it is) sort of a crossroads between college and the real world. Allmen-Vinnidge says students who do find jobs after college have done their homework. “The typical graduate who does have a job offer started working on it two years ago. They've postured themselves well during the summer. They've had several internships (实习) ,” she said. And they've majored in one of the few fields that are still hot—like chemical engineering, accounting or nursing—where average starting salaries have actually increased over last year. Other popular fields (like information systems management, computer science, and political science) have seen big declines in starting salaries.

    Ryan Stewart (he had hoped to become a teacher) may just end up going back to school. “I'd like to teach college some day and that requires more schooling, which would be great in a bad economy,” he said.

    It is true more students are able to receive college education. It is also true that they will have to face fiercer competition in the job market as they graduate. It becomes harder and harder for the current graduates to get a foothold in job markets, but many of them have no choice but to follow the beaten track. To some students a degree may not be ticket to instant wealth. For now, they can only hope its value will increase over time.

Shakespeare's Sister

    Let us imagine, since facts are so hard to come by, what would have happened had Shakespeare had a wonderfully gifted sister, called Judith.

    Shakespeare himself went, very probably — his mother was an heiress — to the grammar school, where he may have learnt Latin — Ovid, Virgil and Horace — and the elements of grammar and logic. He was, it is well known, a wild boy who poached (偷猎) rabbits, perhaps shot a deer, and had, rather sooner than he should have done, to marry a woman in the neighborhood, who bore him a child rather quicker than was right. That escapade sent him to seek his fortune in London. He had, it seemed, a taste for the theatre; he began by holding horses at the stage door. Very soon he got work in the theatre, became a successful actor, and lived at the centre of the universe, meeting everybody, knowing everybody, practicing his art on the boards, exercising his wits in the streets, and even getting access to the palace of the queen.

    Meanwhile his extraordinarily gifted sister remained at home. She was as adventurous, as imaginative, as curious to see the world as he was. But she was not sent to school. She had no chance of learning grammar and logic, let alone of reading Horace and Virgil. She picked up a book now and then, one of her brother's perhaps, and read a few pages. But then her parents came in and told her to mend the stockings or mind the stew(炖锅) and not moon about with books and papers. They would have spoken sharply but kindly, for they were practical people who knew the conditions of life for a woman. Soon, however, before she was out of her teens, she was to be engaged to the son of a neighboring wool stapler(经销商). She cried out that marriage was hateful to her, and for that she was severely beaten by her father. Then he ceased to scold her. He begged her instead not to hurt him, not to shame him in this matter of her marriage. He would give her a chain of beads or fine dresses, he said; and there were tears in his eyes. How could she disobey him? How could she break his heart?

    The force of her own gift alone drove her to it. She made up a small parcel of her belongings, let herself down by a rope one summer's night and took the road to London. She was not seventeen. The birds that sang in the woods were not more musical than she was. She had the quickest fancy, a gift like her brother's, for the tune of words. Like him, she had a taste for the theatre. She stood at the stage door; she wanted to act, she said. Men laughed in her face. The manager — a fat, loose-lipped man — howled with laughter. He roared something about puppies dancing and women acting — no woman, he said, could possibly be an actress. She could get no training in her craft. Could she even seek her dinner in a bar or roam (游荡) the streets at midnight? Yet her genius was for fiction and lusted to feed abundantly upon the lives of men and women and the study of their ways. At last — for she was very young, oddly like Shakespeare the poet in her face, with the same grey eyes and rounded brows — at last Nick Greene the actor-manager took pity on her; she found herself with child by that gentleman and so — who shall measure the heat and violence of the poet's heart when caught and confined in a woman's body? — killed herself one winter's night and lies buried at some cross-roads where the omnibuses (公共汽车) now stop outside the Elephant and Castle.

    That, more or less, is how the story would run, if a woman in Shakespeare's day had had Shakespeare's genius.

    I had been in the city for some time and was coming home. I missed my boat and decided to travel on an old ship. I knew that it would not be a comfortable journey but I had no time to wait for another boat.

    Hardly had we left the port when I saw the dog Gulliver, the captain's favourite dog, for the first time. What a big dog it was! I had never seen one that could frighten me so much!

    On the third day the ship caught fire. Nobody tried to put it out. The ship began sinking and all the men rushed to the life-boats. I saw no chance of getting away in a boat. Suddenly I remembered there was a life-raft on the ship. I had no time to lose, so I immediately rushed towards the raft and pushed it overboard.

    In jumping down onto the raft I hurt myself badly and was unconscious for some time. When I came to, I found there was no sign of a life-boat. Every man who had been on board the ship must have gone down with her. I was the only one who was saved.

    The I saw Gulliver was coming fast towards the raft. He struggled a long time before he managed to get onto it. I wanted to push him back into the water but did not dare to move. The dog shook himself, went to the other end of the raft and lay down. I didn't dare to sleep that night. I must watch him. In the moonlight I could see his eyes were open. He was watching, too.

    Street art is a very popular form of art that is spreading quickly all over the world. You can find it on building, sidewalks, street sings and trash cans from Tokyo to Paris, and from Moscow to Cape Town. Street art has become a global culture and even art museums and galleries are collecting the works of street artists. Even advertising companies also use street art in their ads due to its popularity.

    Street art started out very secretly because it's illegal to paint on public and private property without permission. People often have different opinions about street art. Some people think it is a crime with others think it's a new form of culture.

    Art experts claim that the movement began in New York in the 1960s. Young adults sprayed words and images on walls and trains. This colorful and energetic style of writing became known as graffiti(涂鸦). Graffiti art showed that young people wanted to rebel against society. They didn't want to accept rules, and they travelled around cities to create paintings that everyone could see. In many cases, they had trouble with the police and the local government.

    Many street corners in Paris show the works of Space Invader. A French artist uses small pieces of glass to make images of space creatures. He has been doing this for some years and the police have arrested him a few times. On his website, you can see many other places where he has created this form of art.

    Street artists do their work for some reasons. Some of them do not like the artists who make so much money in galleries and museums. They choose street art because it is closer to common people. Some artists try to express their political opinion in their works. They often want to protest against big firms and corporations. Others like to do things that are forbidden and hope they don't get caught.

    In today's world, the Internet has a big influence on street art. Artists can show their pictures to people all over the world. Many city residents, however, say that seeing a picture on the Internet is never as good as seeing it alive. The street art movement lives with the energy and life of a big city. There it will continue to change and grow.

    It's 2035. You have a job, a family and you're about 40 years old. Welcome to our future life.

    Getting ready for work, you pause in front of the mirror. “Turn red,” you say. Your shirt changes from sky blue to deep red. Tiny preprogrammed electronics (智能电子元件) are rearranged in your shirt to change its color. Looking into the mirror, you find it hard to believe you're 40. You look much younger. With amazing advances in medicine, people in your generation may live to be 150 years old. You're not even middle aged!

    As you go into the kitchen and prepare to pour your breakfast cereal（谷物） into a bowl, you hear, “To lose weight, you shouldn't eat that,” from your shoes. They read the tiny electronic code on the cereal box to find out the nutrition details. You decide to listen to your shoes. “Kitchen, what can I have for breakfast?” A list of possible foods appears on the counter as the kitchen cheeks its food supplies.

“Ready for your trip to space,” you ask your son and daughter. In 2005 only specially-trained astronauts went into space—and very few of them. Today anyone can go to space for daytrips or longer vacations. Your best friend even works in space. Handing your children three strawberries each, you add, “The doctor said you need these for space travel.” Thanks to medical advances, vaccination shots (防疫针) are a thing of the past. Ordinary foods contain specific vaccines(疫苗). With the strawberries in their mouths, the kids head for the front door.

    It's time for you to go to work. Your car checks your fingerprints and unlocks the doors. “My office, autopilot,” you command. Your car drives itself down the road and move smoothly into traffic on the highway. You sit back and unroll your e-newspaper. The latest news downloads and fills the viewer. Looking through the pages, you watch the news as video film rather than read it.