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.

How to remember your passwords

    Remembering and then forgetting your passwords can be a frustrating business, and one that contributes to more than half of calls made to helplines. {#blank#}1{#/blank#} Once you have reset your password, you're going to need to remember that one too. Follow our tips on breaking the password-frustration cycle.

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    We often create so many user IDs but there are only a small number of passwords that you really need to remember. It's important for you to remember your banking and email passwords, but do you really need to worry about your occasional eBay visit? If you can commit(交付) just a few to memory, you can hand the rest over to a password keeper to do the remembering for you.

Sign up for a password keeping service.

    {#blank#}3{#/blank#} You just need to encrypt(加密) your data and keep it in a safe server. Many password keepers require you to remember just one master password, which will give you access to the accounts you have chosen.

Write them down

    “Just keep them in a safe place, such as a locked box,” says Internet security blogger Bruce Schneider. {#blank#}4{#/blank#} Thus, it isn' t entirely discouraged and can be an efficient back-up plan when all else fails.

Work on your memory

    {#blank#}5{#/blank#} Practicing memory techniques or making certain lifestyle changes, including reducing stress, might just prevent you from having to make that frustrating password phone call ever again.

    A new study shows that rising levels of planet-warming gases may reduce important nutrients in food crops.

    Researchers studied the effects of one such gas—carbon dioxide—on rice. The researchers grew rice plants in a controlled environment. They set carbon dioxide levels to what scientists are predicting for our planet by the end of the century. They found that the resulting rice crops had lower than normal levels of vitamins, minerals and protein. The researchers said the effects of planet-warming gases would be most severe for the poorest citizens in some of the least developed countries. These people generally eat the most rice and have the least complex diets, they noted.

    In the experiment, scientists grew 18 kinds of rice in fields in China and Japan. They pumped carbon dioxide gas over the plants in an effort to create the atmosphere of the future. Rice grown under high carbon dioxide conditions had, on average, 13 to 30 percent lower levels of four B vitamins and 10 percent less protein. The crops also had 8 percent less iron and 5 percent less zinc（锌）an rice grown under normal conditions. However, vitamin E levels increased by about 13 percent on average.

    The results are bad news, “especially for the nutrition of the poorer population in less-developed countries,” said the University of Tokyo's Kazuhiko Kobayashi, who helped to write the report. That includes about 600 million people in Indonesia, Cambodia, Myanmar, Bangladesh, Laos and other nations, mainly in Southeast Asia, the report said.

    One of the scientists is Sam Myers of Harvard University in the American state of Massachusetts. He said that findings like this are an example of the surprises climate change create. “My concern is there are many more surprises to come,” he said.

    Myers noted that pollution, loss of some species, destruction of forests, and other human activities are likely to produce unexpected problems. He said that you cannot completely change all the natural systems that living organisms have grown to depend on over millions of years without having effects come back to affect our own health.

    The new study suggests a way to lower the nutritional harm of climate change. One way, Kobayashi said, is grow different forms of rice that have shown to be more resistant to higher carbon dioxide levels.

    As we know, earthquakes can bring people much fear. There are some places that have few or no earthquakes. Most places in the world, however, have them regularly. Countries that have a lot of earthquakes are usually quite mountainous.

    The most talked about earthquake in the United States was in San Francisco in 1906. Over 700 people died in it. The strongest one in North America was in 1964. It happened in Alaska.

    Strong earthquakes are not always the ones that kill the most people. In 1755, one of the strongest earthquakes ever recorded was felt in Portugal. Around 2,000 people died.

    In 1923, a very strong earthquake hit Tokyo, Yokohama area of Japan. A hundred and forty thousand people died. Most of them died in fires which followed the earthquake.

    One of the worst earthquakes ever was in China in 2008. It killed a large number of people. The worst earthquake ever reported was also in China, in which 400,000 people were killed or injured. This earthquake happened in 1556.

    Earthquakes worry people a lot. The reason is that we often do not know when they are coming. People cannot prepare for earthquakes.

    The doctor made it sound easy. Just walk. It was easy for him to say. I couldn't walk to the end of the road to pick up my mail. I tried to stand up, but soon got breathless and just stopped. My mailbox seemed to be so far away. It was hard for me, though I am only 39 years old!

    A month ago, my wife Stephanie and I were in Colorado Springs with our friends when I woke up at 12 o'clock at night and didn't feel very well. Stephanie and I drove to the hospital, and my 10­day vacation turned into a 10­day hospital stay. I got a scar (伤疤) on my body. It was really tough to walk around then and I needed practice.

    Stephanie had to go to work so she encouraged me to try to take a few walks. Minutes later, she came back with a puppy. "Where did you get that?" I asked. "In our mailbox," she replied. What a wonder! The puppy was dirty, with big pleading (恳求的) eyes. Stephanie was late for work. I was not very happy. I couldn't take care of myself. How could I look after this puppy? "He's going to the pound (动物收容所)," I thought. However, wherever I went, the puppy would closely follow me. I tried walking. The puppy ran ahead, looked back and repeated it again and again. He seemed to say "come on". I took a deep breath, and then tried stepping; the puppy was right at my side. I succeeded at last. I didn't take the puppy to the pound. Instead, we walked toward the mailbox.

    We named him Cheyenne. Before long, I was walking with Cheyenne every day. Pretty soon, I was strong enough to work on the farm again. Now I wonder who put a puppy in a mailbox. Nobody is so crazy after all, Cheyenne was maybe what the doctor ordered.

Growing up, we are constantly reminded that young people are heavily affected by technology. We are the "antisocial club", those who prefer to text our friends in the same room rather than make eye contact with them. And even though never-ending studies reveal to us the extent of our social media addiction, we should at least consider that it's not only our young people's problem any more.

There's the rise of the Instagram mums, who like to post an abundance of cute baby pictures, share their mom feelings along the way and show their wonderful lifestyles. They are the so-called "Facebook mum generation", a growing group of parents that like to overshare.

While all of this might be fine, and even a little humorous, new research suggests that parents' technology addiction is negatively affecting their children's behavior. According to the study, 40% of mothers and 32% of fathers have admitted having some sort of phone addiction. This has led to a significant fall in verbal interactions within families and even a decline in mothers' encouraging their children.

There is no denying that I get annoyed when receiving the words "I'll be with you soon" from a parent, when all I want to do is ask one question. But, at the same time, every day leaving the room to wait until my father is finished with his "serious business" (Farmville), has now become the norm. Whether you want to escape your disturbing children for a bit, or want to stay up late flicking through Twitter, know that wanting to do all of these is normal. We, your children, know how addictive it can be and how difficult it is to switch off. But before telling us to put our phones away at the table or even worse, listing statistics of how damaging social media can be for us, maybe lead by example, considering how much time you spend on the phone and how this is impacting your children and your relationship with us. Maybe in this way we can work on our addiction together.