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.

LONDON — A British judge on Thursday sentenced a businessman who sold fake(假冒的) bomb detectors(探测器) to 10 years in prison, saying the man hadn't cared about potentially deadly consequences.

    It is believed that James McCormick got about $77.8 million from the sales of his detectors - which were based on a kind of golf ball finder - to countries including Iraq, Belgium and Saudi Arabia.

    McCormick, 57, was convicted(判罪) of cheats last month and sentenced Thursday at the Old Bailey court in London.

    "Your cheating conduct in selling a great amount of useless equipment simply for huge profit promoted a false sense of security and in all probability materially contributed to causing death and injury to innocent people," Judge Richard Hone told McCormick. "you have neither regret, nor shame, nor any sense of guilt."

    The detectors, sold for up to $42,000 each, were said to be able to find such dangerous objects as bombs under water and from the air. But in fact they "lacked any grounding in science" and were of no use.

    McCormick had told the court that he sold his detectors to the police in Kenya, the prison service in Hong Kong, the army in Egypt and the border control in Thailand.

    "I never had any bad results from customers," he said.

    Dogs are wonderful companions all their own, but they can also help change your life so that you're more accepting of new friendships. A new study studied how dogs' brains responded to the human voice and found that “the human brain responds to dog emotions the same way it responds to human emotions” and that the dog's brain does the same.

    Dogs are pack animals, so in terms of pet ownership, your dog will prefer to stay with you rather than somewhere alone. Think about how this concept applies to friendship. People today are getting more and more used to spending time on social networking, email, and text. While all methods of communication are good, there is nothing like seeing your friends and hearing their voice. With good friends, sometimes a look explains everything, and you can only get this when you're together hanging out in person.

    Let's face it, dogs never hide their feeling. They let you know what they enjoy doing most, whether it is chasing a ball, going for a walk, or getting a treat. For people, it's harder to be open with your emotions. But in order to truly find a friend, you'll need to let go of your fears and put trust into your friends. The reality is that you'll never make everyone you meet happy one-hundred percent of the time, so if your friends and family think you're great, put aside the need to be liked by everyone.

    Dogs wait for you to come home and are so happy to see you again that they practically do a happy dance when you walk through the door. Friends, on the other hand, are sometimes so busy that even hearing from a friend becomes an unwelcome interruption. Rather than avoid calls or emails, make a point to talk to friends on a regular basis.

    With beautiful canals, top art museums, and cycling culture I Amsterdam is one of the most popular travel destinations in the world. As the capital and most populous city in the Netherlands, it's often referred to as the “Venice of the North” because of its wide system of bridges and canals. Here are some key points for you to keep in mind while planning a trip there.

    Must-See Attractions

    Most visitors begin their Amsterdam adventure in the Old Centre, which is full of traditional architecture, shopping centers, and coffee shops. The top museums to visit are the Rijks museum, the Ann Frank House, and the Van Gogh Museum. As a World Heritage Site, the Canal Ring was originally built to attract wealthy home owners and an area for celebrity spotting and nightlife today.

    Transportation

    Travelers should be aware that Amsterdam Airport Schiphol is one of the busiest airports in the world. This airport is located about 15 kilometers southwest of the city center. You can catch a train from Schiphol to Amsterdam Central Station, which has many connecting routes. It's not a good idea to drive a car to the city center. Cycling is popular here, and it's easy to rent a cheap bike around the town. Amsterdam has a flat terrain (地形) and it's a good choice to explore the city on foot.

    Money-saving Tips

    Look for accommodations in Amsterdam's South District where rates are generally cheaper than in the city center.

    Buy train tickets at the machine instead of the counter to save a bit of money.

    Instead of hiring a tour guide, jump onto a canal boat. They're inexpensive and will give you a unique point of view of the city.

    There are many international organizations which work to save and protect endangered species (物种) and natural environment. If you would like more information about any of the organizations listed below, you can write to the addresses given.

    Why elephants rarely get cancer is a mystery that has confused scientists for decades. A study was led by researchers at Huntsman Cancer Institute (HCI) at the University of Utah and Arizona State University, including researchers from the Ringling Bros. Center for Elephant Conservation may have found the answer. According to the results, elephants have 38 additional modified copies of a gene (基因) that encodes p53, a well-defined tumor (肿瘤) suppressor, as compared to humans, who have only two. Further, elephants may have a more powerful mechanism for killing damaged cells that are at risk for becoming cancerous. In isolated elephant cells, this activity is doubled compared to healthy human cells, and five times that of cells from patients with Li-Fraumeni Syndrome, who have only one working copy of p53 and more than a 90 percent lifetime cancer risk in children and adults. The results suggest extra p53 could explain elephants' increased resistance to cancer.

    "Nature has already figured out how to prevent cancer. It's up to us to learn how different animals overcome the problem so we can adapt those strategies to prevent cancer in people," says co-senior author Joshua Schiffman, M.D., pediatric oncologist (肿瘤学家) at Huntsman Cancer Institute, University of Utah School of Medicine, and Primary Children's Hospital.

    According to Schiffman, elephants have long been considered a walking problem. Because they have 100 times as many cells as people, they should be 100 times more likely to have a cell slip into a cancerous state and cause the disease over their long life span of 50 to 70 years. And yet it's believed that elephants get cancer less often, a theory confirmed in this study. Analysis of a large database of elephant deaths estimates a cancer death rate of less than 5 percent compared to 11 to 25 percent in people.