While dog keepers realize their dogs can read their moods accurately,scientists have always been a little doubtful.Now thanks to some researchers at the University of Veterinary Medicine in Vienna,Austria,we finally have some convincing evidence.

    For their study,biologist Corson Miller and his team exposed eleven selected dogs to digital images of women that were either angry or happy.Half the dogs were rewarded for touching the screen when shown a happy face,while the other half got their treat for selecting those that appeared angry.

    Interestingly,the dogs were not provided with the entire face.Some dogs were shown only upper halves while the others observed lower halves.That's because the scientists believe humans show their emotions on their entire face.

    After some training like how to recognize small differences like the wrinkles between the eyes or the changes in their shape that accompany the happy or angry expressions,the dogs were mostly able to identify the correct expression not only on a familiar face but on a strange face.The researchers concluded the dogs were smart enough to read human emotions.

    They also found those being trained to read angry expressions took a longer time to learn.They guess it may be because dogs find angry faces disgusting,causing them to withdraw quickly.However,once the smart dogs realized they were getting rewarded,the trepidation seemed to disappear.In fact,the dogs had such a good time playing the computer "game" that scientists had a hard time keeping them away from the touch screens after the study was completed.

    The researchers also noticed only dogs with a male owner had a harder time understanding the expressions correctl. Since the touchscreen models were all females, this confirmed what has been observed in previous studies-dogs are more efficient at reading facial expressions of people that are the same gender as their owner.

    A layover（临时滞留）or flight delay can be extremely fun in these international airports.

Munich Airport, Germany

    Aviation（航空）lovers passing through Munich can take a behind-the-scenes tour to learn how the airport operates. Visitors can also tour three historic aircraft and a retired rescue helicopter, climb up to a 28-metre high observation platform for an up-close view of take-offs and landings, and watch films on aviation in the airport's 60-seat cinema. Travelers can also kill layover time at an 18-hole mini-golf course, or even stop in for a teeth cleaning at the airport dental office.

    Changi Airport, Singapore

    After a long flight to Singapore, travelers can relax in a Balinese-style swimming pool, work out at the airport gym, or enjoy a drink and live musical performances at the airport's Music Bar. The airport also boasts a tranquil butterfly garden, and a “fragrant garden” which is home to 15 species of plants and trees. Free movies at one of two airport cinemas also keep passengers entertained.

    Schiphol Amsterdam Airport, the Netherlands

    Schiphol is Europe's fifth-largest airport. Here passengers can view the works of Dutch masters free of charge, and try their luck at airport's casino（赌场）. You can even have your wedding ceremony at Schiphol—couples can choose from four different wedding packages, including a 1930-style ceremony held on a Dakota military aircraft.

    San Francisco International Airport, California

    The airport's 24–hour AirTrain not only moves passengers between terminal, but also provides a fun view of the runways. There are three aquariums（水族馆）to explore, along with interactive play area, an aviation museum, and a library. If that's not enough to keep the little ones busy, travelers can rent portable DVD players and movies for use in the airport.

    When Iwas.in the third grade, we had a hunt at school. We gathered up chalk，pencils，stones, and so on, rapidly filling our checklists. It was a very close race. I was out of breath when I reached the clover (三叶草)patch in search of the last, most hard-to-find item: a four-leaf clover.

    I was pretty sure that I was going to win. 1 have always been able to find four-leaf clovers. I just see them.

    I spent my childhood collecting and pressing four-leaf clovers into books at my mother's house. I started with big cloth- and leather-bound books. When I ran out of romantically bound volumes, I began to put my treasures into anything I could find: fiction paperbacks, cookbooks. The same is true in my house today. Shake a book, and a papery treasure just might fall into your hand.

    A few years ago, in Nova Scotia, my husband and I pulled off the road for a picnic. The ground was thick with clover. Some shoots had four, five, even six leaves. I lined them up on the picnic table to admire as my husband, never yet having found one four-leaf clover, looked on with awe. To me, it was simple. The differences in their shapes popped out, breaking the pretty pattern of the conventional clovers with their three perfect leaves.

    Two summers back, while waiting for an airport shuttle in Munich, I found a tiny four-leaf clover in a traffic circle and put it into my passport. On the way home, my husband and I were upgraded to business class. Friends attributed our good luck to the clover. I think, it's more likely that we were upgraded because a kind customer service officer took pity on us.

    People disagree about whether the luck lies in the finding or in the possession of a clover. Some believe that the luck is lost if the four-leaf clover is even shown to somebody else, while others think the luck doubles if it is given away. I believe that positivity is increased by sharing. I feel lucky to find the clovers so often, but I don't think they influence my life any more than it does to share anything a little special—that momentary closeness between you and a friend or a stranger, as you all lean in to wonder at a rare find.

    “Attention, everyone!” Miss Dalrymple looked at her class of ten-year-olds. “Today we are going to create a special card for Father's Day, which falls on this weekend.” Then she busied herself handing out the paper and art materials to her noisy pupils.

    They were a mixed punch. Some came from the rich side of the town, but the majorities were from parents who struggled to get jobs. So she had not been eager to carry out this activity.

    “Think about all the things that your dad does that make him special,” she said loudly as she approached the last table. “You can write a poem or short story thinking of the positive characteristics that make your dad special. The written part of this activity should be completed before you start to decorate your card.”

    Andrew looked at the blank page. He had never met, spoken to, or been hugged by his dad, so how could he write about him? Once when he was looking in his grandma's photo box, he had seen an old black and white photo but it was badly creased(弄皱) and difficult to recognize any clear features. She had quickly taken it from him and buried it deeply among the rest, never to be found again. After thinking for a while, he wrote:

Dear Dad,

    You are a person I do not know and would probably not recognize as I only saw an old photo of you a long time ago. I think and wonder about you often, especially when I have no one to talk to about the Saturday fixtures(体育活动). One day when I grow up I will do an Internet search to find you, but I am not sure whether I will be successful as several attempts by the Child Support Agency have not been successful. Happy Father's Day, Dad.

Love,

Andrew

    Everyday Food by Martha Stewart

    No matter how busy you are, at the end of the day you want meals that are easy to prepare. And you want lots of choices and variations. You'll find all of that in this book: 250 simple recipes for delicious meals that bring freshness and nutrition.

    Paperback, published by Random House, $16.79

    Zeroes

    By Scott Westerfeld, Margo Lanagan, Deborah Biancotti

    The New York Times best-selling author Scott Westerfeld teams up with Margo Lanagan and Deborah Biancotti in the book about six teenagers with amazing abilities. These teenagers have powers that set them apart. They can do things ordinary people can't.

    Paperback, published by Simon & Schuster, $12.99

    Mighty Jack

    By Ben Hatke

    Jack dislikes summer. But he's got a good reason: summer is when his single mom takes a second job and leaves him at home to watch his sister, Maddy. It's lots of responsibility, and it's boring, too, because Maddy doesn't talk. But one day, at the market, Maddy does talk—to tell Jack to trade their mom's car for a box of mysterious seeds. It's the best mistake Jack has ever made.

    Hardcover, published by First Second, $14.15

    Only Daughter

    By Anna Snoekstra

    She's caught stealing. She's homeless and on the run. But she happens to look the same as a girl who went missing a decade ago, Rebecca Winter. She takes Rebecca's identity, using it as a way out. Little does she know her new life as Rebecca is itself a prison and it looks like a killer might be after her.

    Kindle edition, published by Harlequin Enterprises, $8.88