Smith entered Mr.Watson's office.The boss was a hard man.He fired people who didn't do well without giving them a second chance.

    “Smith，” said Mr.Watson，“this past year your department hasn't earned money.We're going to drop that department.It's finished.I'm sorry，—but you'll have to go.” “But，sir—if I just had a little more time.For the moment I need the job to keep my son at Riverside School.”

    “What's that！” said the boss.“Riverside！I didn't know you had a boy there.That's an expensive school for a man with your salary.”

    “I know，sir.But he likes it there so much！He's a star athlete and the best boxer in the school.The boys call him Champ (冠军)there.”

    The boss sat perfectly still for a long time—a faraway (恍惚的) look in his eyes.Then，suddenly，he said，“We've got to close your department，Smith. But you'll take over a new job in another department.It means longer hours—maybe more pay.Now get out.You're here for life.”

    Smith got out，with surprise on his face.Then the boss took a letter from the top drawer of his desk.It was Herbie's last letter from Riverside School—written a few days before he died.He had read it over and over again with sick pain.The letter read：

    I can't say the boys here are any nicer to me than the others were.I guess it's the same everywhere when you're a cripple (跛脚的人)．But don't worry about me，Dad.They've got a good chemistry department here.And there's one boy here who is really great.He's a track star and boxing champ and just tops in chemistry.The boys call him Champ.He made them stop throwing my books around.And he knocked a boy down who hit me.He is the best friend I ever had.Dad，when I grow up，I want to do something for Champ.Something big—that he won't even know about.

    Robots make me nervous—especially the ones which seem to think for themselves. I was embarrassed to admit this till I heard that Bill Gates, the founder of Microsoft, felt the same way.

    Gates said in an interview with the social networking and news website Reddit: "I am in the camp that is concerned about super intelligence. First the machines will do a lot of jobs for us and not be super intelligent．That should be positive if we manage well. A few decades after that, though, the intelligence is strong enough to be a concern."

    Well, maybe I don't have to worry about my computer and kitchen equipment yet. After I use them I can always pull the plug. But in the future, machines might find a way to prevent us from switching them off. There's a terrible thought!

    Maybe the problem with computers too clever for us is not that they are evil like some we've seen in sci-fi movies. What could put us in danger is that they might be too efficient. That's what philosopher Nick Bostrom from Oxford University believes. He says that machines are indifferent to humans and in pursuit of their own goals，the destruction of people might be just additional damage. Bostrom gives us an example: A machine which might have its only goal to produce as many paperclips as possible might look at human bodies as extra material for paperclips and go after you. Because it is, well, a machine, it would not take pity on you.

    It's a good thing that American writer Isaac Asimov thought about how far robots can go and left us his three rules of robotics. They state that a robot may not hurt a human being or allow the human being to come to harm.

    I'm glad my machines at home are "dumb". All my cleaner wants to take over is the carpet in my living room. Let's hope they don't create an appliance which wants to take over the world!

    Montreal, Quebec is a great vacation destination with a number of annual and on-going activities and events in the area. Find a variety of area activities and attractions, lodging options and complete vacation packages conveniently online!

    Winter in Montreal: Ice Skating

    The skating experience starts with a guide who will bring your group to a rink (溜冰场) that is best for learning. You can rent skates, and you will be taught how to skate comfortably whether you are a beginner or an expert. The skating experience lasts 3 hours and an extra hour when you are allowed to take pictures and truly enjoy the rink experience.

    Montreal Tower Observatory

    This 4-hour tour will take guests to the tallest inclined tower in the world, complete with an added tour of the botanical garden. You'll notice that the city is actually quite beautiful especially from such a tall building. If you are bringing children along they will get a kick out of how unique the structure of the building is in the skyline of this big city. The trip to the top takes only approximately 2 minutes.

    Flavors of Old Montreal Walking Tour

    This is a 1.5-hour food walking tour. You'll basically explore all of old Montréal and you will see a place that has a rich culture and rich history. You will see what it was like in the olden days. You will see the life of the first and only French province in Canada. You will eat delicious foods like cheese, macaroons, and even more.

    Montreal Half-Day Bike Tour

    Montreal half-day bike tour is family friendly which lasts almost 3 hours. This ride is acceptable for any skill level and any age. There are three routes to choose from including the city tour, the Vista architecture tour and the city of contrast tour. Each course will have a tour guide who will introduce the sightseeing during the trip.

    Kieron Graham has known from a young age that he was adopted. While he loves his adoptive family, he has always wondered about his birth mother and brother. When his adoptive mom gave him a DNA test tool, they both hoped it might lead to his birth family. But neither guessed it would work so quickly, or that when it did, Graham would learn he and his long-lost brother may have crossed paths every day.

    It took just one week from the time Graham, a college student at Georgia's Kennesaw State University, received his DNA results on Ancestry.com for him to connect with his brother. Graham's DNA results showed that his closest match was a man named Vincent Ghant, and it turned out Ghant lived just a few minutes away.

Graham reached out and learned that the two were in fact long-lost brothers. Their mother, Shawn Ghant, made the difficult decision to place Kieron in adoptive care when he was just a baby. And she has worried and wondered about her youngest son ever since. Graham has since been reunited with his mother and both of his brothers on his mother's side.

    “It's all surreal(离奇的), too many emotions to describe exactly what I'm feeling about the entire situation, but it's a good situation,” Graham tells MNN.

    As fate would have it, Kieron and Vincent are both students at Kennesaw State. They even have the same major: political science. So it's a safe bet the two crossed paths many times over the past three years. And now, thanks to some DNA sleuthing(筛查), the two will cross paths many more times in the years to come.

    “We're getting together on Christmas with everyone, birth mother included,” Graham says. “That's sure to be a very indelible Christmas indeed, which will always be treasured by us.”

    Scientists have found an unexpected use for virtual reality headsets (耳机). The devices (装置), widely used by computer gamers, show pictures that can be used to test the navigational (导航的) skills of people, who were thought to be at risk of dementia (痴呆). Those who do worse in the tests will be the ones more likely to develop Alzheimer's disease later in life, scientists now believe.

    The discovery that the loss of navigational skills was associated with Alzheimer's was made several years ago by Dennis Chan and his colleagues based at several centers in the UK. These studies used computers to test navigational tasks. But now scientists plan to take their tests to a new level with the use of the virtual reality headsets in which wearers are placed in man-made environments through which they must navigate.

    Around 300 people, aged between 40 and 60, will be arranged to participate in the study. Some will have a gene that puts them at risk of the condition or will come from a family with a history of Alzheimer's. Not all will certainly be affected by the disease, however. Chan's project aims to find out who will. Wearing the headsets, participants will be asked to navigate their way through a series of different environments and then remember the details.

    Researchers recently pointed out the significance of a tiny area of the brain known as the entorhinal cortex (an important memory center in the brain). It acts as a center in a widespread brain network that controls navigation. This now appears to be the first part of the brain that seems to be easily harmed by Alzheimer's.

    The goal of the work is to help people as they develop the disease. "So far, drug trials for Alzheimer's have been applied when people have already got dementia, by which time considerable damage to the brain has already occurred," Chan told the Obsenver. "If we can develop drugs and use them earlier, for example, before the disease has spread beyong the entorhinal cortex, then this would have the potential to prevent the dementia."

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