If you're a fan of smart technology, you may have had some sleepless nights lately.

    That's because Alexa, the artificial intelligence (AI) behind US company Amazon's Echo smart speakers, has been "letting out an automatic, creepy (令人毛骨悚然的) cackle," for no apparent reason, according to BBC News.

    Many social media users shared their stories of Alexa scaring them with the seemingly unprompted laugh.

    "Every time Alexa laughs, an angel dies," Tesla and SpaceX founder Elon Musk joked on social media.

    On March 7, Amazon released an update that fixed the problem, saying that the laugh was triggered (引发) by Echo devices mistakenly thinking that users had said the command "Alexa, laugh".

    However, what should have been a funny story raised the ongoing topic of man versus machine.

    With the rise of artificial and robotic technology, "Digital machines have started to demonstrate (展示) broad abilities in pattern recognition, complex communication, and other fields that used to only belong to human," wrote Erik Brynjolfsson and Andrew McAfee in their book The Second Machine Age: Work, Progress, and Prosperity in a Time of Brilliant Technologies. They believe that AI will "do more and more, and our lives will get better".

    However, ever since the earliest days of AI, there have been concerns that some day, software will take over the world, leaving the fate of humans unknown.

    "With artificial intelligence we are summoning (召唤) the demon ," Musk told students during a meeting at MIT in 2014. "If I had to guess at what our biggest existential threat is, it's probably that. So we need to be very careful."

    Many scientists have shared the same concern. The late British physicist Stephen Hawking said at a technology conference in Portugal in November that "computers can, in theory, imitate human intelligence, and exceed it… AI could be the worst event in the history of our civilization." If creators are to safely control AI, however, Hawking suggested that they "employ best practice and effective management".

    "I am an optimist and I believe that we can create AI for the good of the world," he said at the conference. "We simply need to be aware of the dangers, identify them, employ the best possible practice and management, and prepare for its consequences well in advance."

    The Pew report—which was based on surveys carried out in Britain, France, Germany, Italy, Spain, Greece, Poland and the Czech Republic—concluded that the European Union was “ the new sick man of Europe”.

    The percentage of Europeans with a favorable view of the EU has plunged from 60 percent last year to 45 percent now.

    The UK may be considered the most Eurosceptic（欧洲怀疑论者）country, but its support for the union has barely changed in the past 12 months, slipping only two points to 43 percent.

    By contrast, France's backing for the EU has slipped sharply, from 60 percent last year to 41 percent today.

    On the question of whether to remain in the EU, 46 percent of the British want to leave the union and surprisingly, the same percentage want to stay.

    The Pew report's authors said, “The long-drawn economic crisis has created bad forces that are pulling European public opinion apart, separating the French from the Germans and Germans from everyone else.”

    They added, “The effort over the past half century to create a more united Europe is now the main disaster of the euro crisis. The European project now stands in a bad reputation across much of Europe.”

    The only European leader rated highly by their own voters was the German Chancellor Angela Merkel, with 74 percent voters in favor of her.

    Prime Minister David Cameron was the next highest with a positive score of 37 percent among the British public, although he can take some comfort from the fact that 58 percent of Poles（波兰人）and half of all French people think he is doing a good job.

    In spite of the dark economic future and growing doubt of the EU, there were strong majorities of more than 60 percent in favor of keeping the euro in the five countries surveyed that use the single currency.

    Everyone is welcome to visit our city Los Angeles (LA). I am sure you can do many things in Los Angeles with your kids.

    Fun at the Beach

    Thanks to its almost perfect weather all through the year, a visit to the beach is one of the best things to do when in Los Angeles with your kids. While they enjoy themselves nearby, you can simply lie back and have a good rest in the sun.

    Trip to Disneyland

    A trip to the City of Angels with your little angels is incomplete (不完整的) without a visit to the Magic Kingdom. The joy they'll feel from being around all those Disney characters that they know and love will light up your day, too.

    Visit to the Museum

    If you want to turn your stay in LA into an educational one for your kids, you should visit the museum. Starting with the Natural History Museum of Los Angeles County to the California Science Center, or even the Kidspace Children's Museum in Pasadena, you have many choices. I'm sure a visit to all these places will make your kids smarter.

    Visit to the University Studios Hollywood

    Your kids could get to see interesting things from some of the most popular movies ever. From the theme park of Jurassic Park to Wisteria Lane from the TV play Desperate Housewives, the Universal Studios Hollywood is a place that we all find wonderful.

    A strange object was found in a small city called Carlos Spegazzini, just a short drive from the capital city of Buenos Aires.

    When farmer Jose first found an odd scene in his farmland, he began to dig at the object. However, he quickly found himself running to tell his wife. Jose needed more support if he was going to investigate this strange thing.

    Even the dog was hesitant to investigate. Unfamiliar with the object, man's best friend was not about to jump at it with little concern. Therefore, they chose to call in somebody who has a better idea of what to do.

    When the police first showed up, they were just as stumped as Jose. They knew this object was something out of the ordinary. It might even be something extraordinary, so more questions appeared.

    It quickly became apparent, it was time to call in the big guys. That's right; when you find something that appears to be out-of-this-world, it's time to call in those who study the mysteries of the old world.

    Authorities called in archaeologists who jumped at the chance to study the object. They quickly determined one thing was for certain: the ancient big one that left this behind was absolutely massive! The group was unable to move the shell, as it weighed nearly two tons!

    Clearly, this massive beast was not the only of its kind existing in the modem-day world. Similar fossils had been found in the surrounding areas and had even made their way to museums. But what was the ancient beast?

    I was getting ready to go to bed when the phone rang. This could not be good. My mind raced through the list of family members who might need help, but the voice was hardly familiar.

    "Linda, this is Lesley." I didn't know Lesley well. We did occasionally speak with each other, but to say we were friends was not appropriate. I asked what she needed. Perhaps something really awful caused her to reach someone she barely knew. Instead, she asked me, "Do you have room for a turkey? In your freezer?" We had lots of room in our freezer, and in fact, too much. "Sure," I responded, "did your freezer break down?" "Not exactly," Lesley replied, "but I will explain when I arrive."

    Minutes later came a huge freezer truck. Lesley stepped down and explained the lease (租约) of the grocery store her husband serviced had run out and that they had to empty all the freezers that night. Thinking it was a shame to throw away all this good food, they decided to drop off food to anyone she could think of. Noticing our freezer was pretty empty, Lesley asked to fill it up. Our home was their last stop and anything left would have to be put in our freezer. An hour later, everything finished, I asked her, "When will you come back for all this?" Lesley laughed, "We don't want it back. It is yours! Thanks for helping us out!" Then they waved goodbye and drove away.

    "For helping them out?" We opened our freezer door. Inside were all expensive foods we never bought but often longed to try. We were struggling to buy groceries, yet it was not something we shared with anyone. However, our needs were met in an unexpected way by that call.

The Art Institute of Chicago

    Visiting time

    The museum is open daily 10:30 am-5:00 pm. The museum and its shops are closed on Thanksgiving Day, Christmas Day, and New Year's Day.

    Highlights of the Art Institute

    American Art

    Discover how artists have expressed the many aspects of the American experience through the rich variety of this collection. This tour might include the works of artists like Paul Revere, Winslow Homer, and Georgia O'Keeffe.

    Impressionism: Monet, Degas, Renoir and More

    Learn about the color and excitement of late 19th-century life as you view one of the most admired collections of French Impressionism in the world.

    Hidden Histories

    Hear stories about artists and their artworks that may be overlooked or under-appreciated for one reason or another  These could be very small or out-of-the-way works.

    For families with children

    With free admission for kids under 14 and Chicago teens under 18, the Art Institute is the perfect place for a creative outing with the whole family.

    Visit the Family Room in the Ryan Education Center, and introduce your children to the museum's collections with a variety of activities. Assemble (组装)puzzles based on masterpieces in the museum, build architectural wonders with colorful blocks, and learn about art through stories and games. Food is available at an on-site cafe. (Outside food is not allowed to be brought in.)