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.

    The Boy Made It!  One Sunday, Nicholas,a teenager, went skiing at Sugarloaf Mountain in Maine．In the early afternoon, when he was planning to go home, a fierce snowstorm swept into the area．Unable to see far,he accidentally turned off the path．Before he knew it,Nicholas was lost,all alone!He didn't have food,water,a phone,or other supplies．He was getting colder by the minute．

    Nicholas had no idea where he was．He tried not to panic．He thought about all of the survival shows he had watched on TV．It was time to put the tips he had learned to use．

    He decided to stop skiing．There was a better chance of someone finding him if he stayed put．The first thing he did was to find shelter from the freezing wind and snow．If he didn't,his body temperature would get very low,which could quickly kill him．

    Using his skis,Nicholas built a snow cave．He gathered a huge mass of snow and dug out a hole in the middle．Then he piled branches on top of himself,like a blanket,to stay as warm as he could．

    By that evening,Nicholas was really hungry．He ate snow and drank water from a nearby stream so that his body wouldn't lose too much water．Not knowing how much longer he could last,Nicholas did the only thing he could—he huddled(蜷缩)in his cave and slept．

    The next day,Nicholas went out to look for help,but he couldn't find anyone．He followed his tracks and returned to the snow cave,because without shelter,he could die that night．On Tuesday,Nicholas went out again to find help．He had walked for about a mile when a volunteer searcher found him．After two days stuck in the snow,Nicholas was saved．

Nicholas might not have survived this snowstorm had it not been for TV．He had often watched Grylls' survival show —-Man vs．Wild． That's where he learned the tips that saved his life．In each episode(一期节目) of Man vs．Wild, Grylls is abandoned in a wild area and has to find his way out．

    When Grylls heard about Nicholas' amazing deeds,he was super impressed that Nicholas had made it since he knew better than anyone how hard Nicholas had to work to stay alive．

    Scientists have found that human eyes are more likely to be damaged by UV rays (紫外线) while skiing in the snow-covered areas than sitting on the beach, according to a report by the UK newspaper The Telegraph.

    The researchers at Kanazawa Medical University, Japan and American company Johnson conducted the study together. They looked at the effects of light reflection on newly fallen snow on a ski trail (a rough path) in Ishikawa District, northern Japan. They compared the results with the levels of UV rays on a sand beach in southern Japan's Okinawa District They found that on the beach, eyes are exposed to a daily 260 kilojoules (千焦耳) of UV a square meter compared to 658 kilojoules in snow-covered areas. The findings are supported by the Japan Meteorological Agency. According to the agency, the reflection rate of UV light on beaches is often between 10 and 25 percent, compared to 80 percent in lie new snow areas. The amount of light increased 4 percent with a 300-meter rise in height.

    Most of us know that UV rays can harm the skin. That's why we wear sunscreen on our skin before we get out in the suit. But many of us may not realize that UV rays are also harmful to the eyes.

    If your eyes are exposed to large amounts of UV radiation over a short period of time. You may experience a kind of sunburn of the eye, which is harmful. Your eyes will become red and feel a strange feeling. They may be sensitive to light. Fortunately, this is usually temporary and seldom causes permanent damage to the eyes.

    Long-term exposure to UV radiation, however, can be more serious. Scientific studies and researches have shown that exposure to small amounts of UV radiation over a period of many years increases chance of eye damage, which could lead to total blindness.

    Getting on the school bus, like the possible dangers around the home, getting on the school bus can also bring its own set of dangers. There are several important safety measures that parents should be aware of when it comes to bus safety.

    Parents should always make sure that someone is taking charge of children at the bus stop to make certain clear ground rules which are in place and are being followed—particularly rules that forbid horseplay in and around the street.

    Teach children to ask the bus driver for help in picking up anything they may have dropped around the bus, as children getting dropped articles are often hit by the bus or another vehicle because they are not seen by the bus driver or by oncoming traffic.

    Children should be asked to take five large steps away from the bus when they get it off, and make sure that the bus driver can see you and look you directly in the eyes to signal it is OK to cross the street. It is still very important that children also look both ways as they cross the street.

    Inform children that they must never speak to any stranger who talks with them first and that they must never accept a ride from any person unless their parents tell them directly that it is OK. Teach kids that adults should ask other adults for help, not kids. If an adult asks a kid for help, that child should get another adult.

    If for any reason a child feels uncomfortable or unsafe at the bus stop they need to bring it to a parent's or caregiver's attention.

Remember, planning ahead is always the best safety measure. Follow these rules and your family will be off danger!

    Everybody seeks happiness in the world. We will be really happy when we get a new car or a big house or get married... The thing is, if we are continually searching for happiness in the outside world, we will be very disappointed. It seems as if we are forever chasing it and it is always just one step away.

    Happiness is a short state of mind, just like the state of sadness or joy or anger. It would not be possible for us to be in a happy state 24 hours a day. If you think that sounds laughable, think about being at a funeral when everyone is mourning. Would it feel right to go about with a huge smile on your face?

    What we go through in our lives helps us grow and understand the value of happiness. We need to be able to respond in all manner of ways according to what we are dealing with at any given time. All emotions and states are part of the life.

    Happiness can be found in reaching out and being in relationship with people. Though time or money may be lost in helping others, these will become our happy memories. Happiness is a dance with whatever in front of you. It is a deep connection to everything around you. It does not come from expecting others to bring you joy but from how you can create joy for others.

    If you want to experience happiness more often, see what you can do to put a smile on someone else's face each day and notice how much happier you feel when you have achieved that. Happiness is not to be found in material possessions. It is freely available to everyone at any time. All that is required to experience happiness is that you place your focus on moments in your life that make you smile.

    In San Francisco, where the number of the homeless has risen by 7% in the last decade, a non-profit organization is putting bathrooms on wheels and driving them to those in need. The group, Lava Mae, is improving retiring city buses and bringing them into different neighborhoods, currently providing about 200 showers each week.

    Doniece Sandoval, the founder of Lava Mae, first became interested in the issue in 2012, when she passed a young woman under an overpass near the San Francisco Design Center who was repeating to herself that she'd never get clean. "It made me wonder what her chances were," said Sandoval, who was then inspired to research exactly how many public shower stalls（淋浴间）existed in the city. Her findings were disheartening.

    So Lava Mae came together when she heard the city would be retiring cold city buses. "I told myself, I want those buses!" she said.

    Each bus has two private bathrooms, one of which is wheelchair accessible. Along with the basic shower, sink and toilet, the spaces have soft lighting, digital controls for water, and hair dryers.

    "Though you're only going to be on the bus for 20 minutes or so, it's 20 minutes of complete privacy," Said Sandoval.

    The buses are parked near agencies that already serve the homeless. "If we can reduce the amount of time people have to run from place to place to get essential services, we'll be able to make things better," said Sandova.

    What's next for lava Mae? The group is starting a program so that others can mimic their process. " What we're hoping to do is to get people to follow what we do, so they can recreate it." she said.