Eight-year-old Owen Howkins suffers from growth delays(迟缓) and poor eyesight. This means that Owen needs a wheelchair to get around. Not surprisingly, he felt people were staring (盯着看) at him, and that made him very uncomfortable, so he became lonely and even stopped going outside of his house. That, however, was all before Haatchi came into his life!

    Haatchi had a very unlucky start to life too. Tied to a railway track when he was just five months old, the dog was hit by a train. The hit unjured his tail and a leg so badly that both had to be cut off. Taken to a rescue shelter(救助站), the dog would have probably been killed if his story posted on Facebook had not been seen by Owen's dad Will. He fell in love with Haatchi and decided to keep him, thinking that they were helping him. It turns out that it was Haatchi who helped them. By always staying at young Owen's side, he became the boy's best friend. Slowly Owen liked to go outside. Wherever he goes, the dog follows and protects him. Owen now proudly walks around the neighborhood, showing off his dog and telling anyone willing to listen, Haatchi's story.

    Haatch's positive influence on the young boy has not gone unnoticed. In October 2012, the International Fund of Animal Welfare presented him with a special award(奖). The amazing friendship between the two has also been shown in a touching short film called “A Boy and His Dog” by students from the filmmaking class at the University of Hertfordshire. It has won several awards and had almost 2 million views. British best-selling author Wendy Holden has also writtern about this touching friendship in a aheartwarming children's book, which was released on February 13th and had made Owen and Haatchi better known!

    Bees and other pollinators（传粉者）  use smells to track down fresh flowers. Air pollutants can weaken those scents（气味）.  Scientists had worried this might make it harder for some pollinators to find a meal.

    Many animals help pollinate plants. Species that do this include bees, butterflies, etc. But for many reasons, the pollinators available to help plants in this way are decreasing. Scientists think a loss of habitat（栖息地）can be one factor. Diseases and exposure to poisonous chemicals also count.

    Jose Fuentes points to air pollution as another possible factor. He's an atmospheric scientist at Pennsylvania State University. In an earlier study, he showed some air pollutants could weaken or destroy scents emitted(发出)by flowers.

    Searching for a meal leaves pollinators out in the open and at risk of becoming other animal's lunch. And any time spent hunting food is time away from their duties back home, like protecting a hive（蜂巢）or nest, explains T'ai Roulston. He's an insect biologist at Virginia University. Roulston worked with Fuentes on the new study.

    In the study, the researchers focused on five kinds of representative scent molecules(分子)plants emit. One molecule they looked at, for example, is called beta-myrcene. Many flowers give off this chemical into the air.  Normally, this gas can travel some 800 meters from its flower source. But in polluted air, this same molecule could travel only half as far.

    Worse still, air pollution might do more than just weaken scent plumes（气味烟云）．Chemical reactions between air pollutants and plumes may transform the flowers' smells, creating new scents. And these scents may be unrecognizable to pollinators.

    That's certainly Fuentes' concern.  So, he says his next research project will look at how insects handle any new flower scent. "It's possible that some insects will change ways to detect and use these new molecules to find food," he says.

    Mr. Peter Johnson, aged twenty- three, battled for half an hour to escape from his trapped car yesterday when it landed upside down in three feet of water. Mr. Johnson took the only escape route—through the boot (行李箱).

    Mr. Johnson's car had finished up in a ditch (沟渠) at Romney Marsin, Kent, after skidding on ice and hitting a bank. "Fortunately, the water began to come in only slowly," Mr. Johnson said. "I couldn't force the doors because they were jammed against the walls of the ditch and dared not open the windows because I knew water would come flooding in."

    Mr. Johnson, a sweet salesman of Sitting Home, Kent, first tried to attract the attention of other motorists by sounding the horn and hammering on the roof and boot. Then he began his struggle to escape.

    Later he said, "It was really a half penny that saved my life. It was the only coin I had in my pocket and I used it to unscrew the back seat to get into the boot. I hammered desperately with a hammer trying to make someone hear, but no help came."

    It took ten minutes to unscrew the seat, and a further five minutes to clear the sweet samples from the boot. Then Mr. Johnson found a wrench (扳手) and began to work on the boot lock. Fifteen minutes passed by. "It was the only chance I had. Finally it gave, but as soon as I moved the boot lid, the water and mud poured in. I forced the lid down into the mud and scrambled clear as the car filled up."

    His hands and arms cut and bruised，Mr. Johnson got to Beckett Farm nearby, where he was looked after by the farmer's wife, Mrs. Lucy Bates. Trembling in a blanket, he said, "That thirty minutes seemed like hours." Only the tips of the car wheels were visible, police said last night. The vehicle had sunk into two feet of mud at the bottom of the ditch.

    Nisha Pradhan is worried. The recent college graduate just turns 21 and plans to live on her own. But she's afraid she won't be able to stay safe. That's because she isn't able to smell.

    Back home, her family do her smelling for her. She's moved in with them for now, but she's looking for a place of her own. “Now that I'm searching for ways or place to live as an independent person, I find that the sense of smell is important to how we live our lives,” Pradhan says.

    She says when she was a child she liked to eat and ate a lot. But there came a point where she lost interest in food.

    “One of the first things that people notice whenever they have a smell problem is that food doesn't taste right any more,” says Beverly Cowart, a researcher. That's because eating and smell go hand in hand. How food tastes often rely on what we smell. “When you lose your sense of smell, your whole sense of food flavors changed and reduced,” Cowart says, “You can still taste the basic tastes. What you're missing are the small distinctions.”

    “When I go out to eat I have often found that food is very tasteless to me. I never feel full,” she says. “I think a lot of us today like to pretend to be food lovers and we all like to talk about 'Oh, I think this could use a little bit more flavor,' or ‘I think this has a hint of meat,' I can't really participate in those conversations,” she says.

    Pradam thinks her smell loss also may have affected her memory. Pradhan may be on to something, according to biologist Paul Moore. “When smell signals come in, you feel about them first. And then you think about it and then the memory is laid down. So without the feel part, the thinking about its part doesn't come. And that means no new smell memory gets created.”

    For many families, a night at the ballpark is a treat. But it can be a terrible experience for those with autistic(自闭症的)children, who are sensitive to light and noise and usually become upset and scared.

    For these families, fear of how their child will react to new situations­and how others will react to them-keeps them from gaining everyday experiences others get to have.

    Dr. Wendy Ross was heartbroken to see that. The pediatrician(儿科医生)in Philadelphia also knew that separation from the community didn't serve her patients well in the long run.

    "If kids are not in the community, building their skills from very young ages, then there's no reason to expect them to be independent one day," Ross said. "It's a social disability. It needs to be addressed in a social setting."

    So in 2007, Ross set out to do just that. Today, her nonprofit, Autism Inclusion Resources, helps families affected by autism deal with challenging social situations, such as sporting events, airport travel and museum visits.

    Many Major League Baseball teams hold annual 44autism awareness nights", when they take temporary measures such as lowering the volume (音量)on the public address system. But Ross wanted to do more. "You can't turn down the volume of the world," Ross said. "It's nice to do it for one night, but our goal is for families to be able to go to a game on any night."

    To that end, Ross partnered with the Philadelphia Phillies to develop a creative program.

    She armed all the Phillies players and game-day staff with knowledge about autism and how to interact with individuals who have the disorder. Each family is also provided a clinician at the game who gives additional support if problems arise. She also helps prepare the families for the event.

    Ross has also found her airport travel program to be successful for families. Using the same principles, she trains airline and security staff at major airports and then guides families through the travel experience, including checking in, going through security and boarding a plane.

    Ross hopes that the tools she gives families can help them explore other settings on their own. "We really see it as a stepping stone to a brighter future," she said.

    You're probably used to the regular upgrades in our cell-phone networks. There was 2G, which came along in 199l, replaced with 3G in 2001, followed by 4G in 2009. Now we're hearing about the coming of 5G.

    But 5G is a much bigger leap than before. 5G, of course, is much faster than 4G in the real world and a 5G phone in a 5G city will enjoy Internet speeds between 9 and 20 times as fast. The arrival of 5G also means enormous leaps forward in capacity－so much that every cell-phone plan will offer cheap, truly unlimited Internet access. "The consequences of that are huge," says Sherif Hanna, Qualcomm's director of 5G marketing. For example, apps will no longer degrade (降低) your video quality or postpone downloading when you're out of Wi-Fi range. In fact, you'll probably prefer to do your downloads when you're on cellular (使用流量) because 5G will be much faster than whatever service you've got at home or work.

    "However, not everyone is excited by the 5G development. The new standard gets its speed partly by using existing transmission(传输) frequencies more efficiently and partly by using the millimeter wave range. That's a big, juicy line of radio frequencies that are currently underused because millimeter wave is really hard to use," Hanna says.

    These frequencies are much higher than anything we've used for the cellular, which means they can offer unbelievable speed－but at the cost of range. Millimeter wave cellular towers have to be about 500 feet apart. Cell carriers not only will have to upgrade all their cell transceivers (called small cells) but will install(安装) a lot more of them as well.

    That's why the millimeter wave flavor of 5G, the superfast coverage, will be available only in densely populated cities such as New York and San Francisco. In suburban and rural areas, 5G will bring a speedup of "only" nine times faster.