While your pet fish may appear to be unaware of your presence, chances are that it knows you extremely well and can probably even identify you from a crowd of human faces!

    To test if this was accurate, some scientists decided to study archerfish（喷水鱼）. These animals don't have a sophisticated（复杂的）brain that is necessary to recognize the slight differences between human facial features.

    They began by presenting four archerfish with images of two human faces. Initially, the fish spit at both. However, they soon learned spitting water at the one selected by the researchers earned them a food treat. After that, they focused primarily on that image. The researchers then took the experiment one step further by introducing 44 other human faces to the mix.

    To the researcher's astonishment, the trained archerfish were able to recall the learned image almost 81% of the time. And this accuracy improved to 86% when the researchers made the identification even harder, by replacing the colored photos with a set of black and white images and hiding the shape of the head.

    The results of the study suggest that though having tiny brains, archerfish may have developed high visual discrimination abilities. While it is contrary to the previous theory that a sophisticated brain is necessary to recognize human faces, the researchers believe they do not recognize faces by recalling complex facial information like gender and identity, but more likely by discriminating between detailed  patterns. Even so, the fact that these archerfish could “remember” those faces demonstrates that they have an impressive memory for details that lasts much longer than the originally-thought 3 seconds!

    This is not the first time researchers have realized how “smart” fish are. Previous studies have shown that fish can recognize those fish they have “socialized” with previously, and even recall complex three-dimensional maps of their surroundings.

    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.

    Watching wooden dolls come to life may not be one of the most popular forms of entertainment today, but with over twenty years' experience, talented puppeteer (木偶表演者) Peter Roberts has earned himself the title "master puppeteer" because of his great ability to turn puppets into believable, almost living characters. "People are quite often surprised to hear what I do for a living and have little appreciation of puppy as a form of entertainment. But while the exact origins of puppet theatre are unknown, it has been popular in many cultures and may have been the very first kind of theatre," he explains.

    Roberts' shows are highly original. "A puppet show can involve anything from clowning(傻逗) to storytelling," he says.  Equally diverse are the audiences he performs for. "Some are attracted by the puppets themselves, while others enjoy the dialogue." Roberts believes that this form of entertainment can be appreciated by people of all ages and cultures.

    Roberts' interest in puppets started when he received some beautiful glove puppets one Christmas. He started putting on shows with these for family and friends and then moved on to handmade Chinese string puppets. Learning mostly from books and personal experience, he explains, "I was already spending most of my free time carving puppets and putting on shows, so I hardly noticed the change from students to full-time professional puppeteer."

    The puppets are designed specifically for each show, which is extremely time consuming. According to Roberts, "Sometimes what you expect and what you actually create in the end are two very different things. I've made some of my best puppets 'accidentally'."

    When most people hear the word "puppetry", they more than likely think of a way of keeping children entertained at birthday parties. Certainly the subject matter will be expected to be light-hearted rather than serious. However, Roberts wants to point out that puppets convey serious messages sometimes." he says.

    Copenhagen Destination Guide

    The modern city of Copenhagen combines the best of European cafe culture and Scandinavian architecture. It's charming and compact with lots of local history to dive into. Although spending time in Copenhagen can become expensive, there are many ways to experience the city on a budget as well.

    Attractions

    Copenhagen is one of the world's best cycling cities. To see the city with ease, rent a bike or take a small group tour to see the sights, including the Little Mermaid, the island of Amager and the community of Christiania. You can also take a canal boat tour to see the city from a unique view. The Tivoli Gardens offer a sense of love in the evenings. There are some excellent museums to explore. Be sure to add the Museum of Art and Design to your travel plan.

    Transportation

    Kastrup Airport is the first destination for most visitors. It typically takes less than 15 minutes to get from the airport to the city center by train, so all the visitors prefer this way to travel between the two places. Canal boat tours are the easiest way to see the city's attractions. Cycling is the fastest and most flexible way to get around, and it's a refreshingly pedestrian-friendly city as well.

    Tips

    Find local sandwich shops to eat like the locals do and give your wallet a break.

    Museum lovers should have a Copenhagen Card, which provides free entrance to about 60 museums and many other attractions too.

    Consider visiting Copenhagen in the autumn, when it's a little cold but accommodations become much cheaper than those in the summer.

    Check at www.Save70.com to view price comparisons for flights and hotels before you book.

    Below is a web page from http://www.parents.com/ .

    Kid of the Year Photo Contest

    Enter your kid's photo today and win! We're giving away 52 weekly $250 prizes from Readers' Choice votes. PLUS our editors will select one entry (参赛作品) to win our grand prize of $7,000.

    Official Contest Rules

    No purchase necessary to enter or win. The Kid of the Year Photo Contest entry period begins at 12:00 a.m. March 23, 2019, and ends on January 21, 2020 (the “Entry Period”). Entries must be received by 9:00 p.m. on January 21, 2020 (“Entry Deadline”). Entries will not be acknowledged or returned.

    SPONSOR: Meredith Corporation, 1716 Locust Street, Des Moines, Iowa.

    ENTRY: There will be two methods of entry.

    Share My Entry:

    Visit http://www.parents.com/photos/photo-contests-1/kid-of-the-year/ and click the button to enter. Then complete the registration form and follow the instructions to upload one album of up to six photos of your child aged three months to eight years. Photos must be taken by entrant, non-professional, unpublished and may not have won any prize or award. Photos must be .jpeg or .bmp image formats (格式) and cannot exceed 3 MB.

    Facebook Entry:

    Visit Facebook.com/ParentsMagazine and click the Kid of 2019 tab. Fill out the registration form and upload one album of up to six photos of your child aged three months to eight years. You may provide one description and one album title that will be applied to all photos. Photos must be taken by entrant, non-professional, unpublished and may not have won any prize or award. Photos must be .jpeg or .bmp image formats and cannot exceed 3 MB.

    This promotion is in no way sponsored, supported or run by, or associated with Facebook. You are providing your information to Parents Magazine and not to Facebook. The information you provide will only be used to run the promotion and register for Parents.com.

    Photos must not contain material that infringes the rights of another, including but not limited to privacy, publicity or intellectual property rights, or that constitutes copyright violation. Photos must not contain brand names or trademarks.

    LIMIT: One entry per household, per eligible (有资格的) child, per week. One weekly prize per child. For entries of more than one eligible child in the household, the entry process must be completed separately for each child. No group entries.

    People like to post their selfies(自拍照) on social media. To know more about it, scientists at Syracuse University in New York recently did a research and came up with some surprising findings.

    People who post selfies and use editing software to make themselves look better show behavior connected to narcissism(自恋), the researchers said. Makana Chock, a professor from Syracuse University, said because social media is mostly used by people to share unimportant information about their lives, it is a good place for people to "work towards satisfying their own vanity." Those "likes" under their Facebook selfies make them feel good.

    Besides, people who post group selfies show a need for popularity and a need to belong to a group, the research found. Some people feel "peer(同伴) pressure" to post selfies and some follow the popular belief that if there is no picture of an event or experience, it did not really happen. "Anyway, it shouldn't be seen as negative. People get sense of satisfaction especially when they get likes. And it does no harm," Chock said.

    Other findings from the study include: There are no major differences on how often men and women post selfies and how often they use editing software. But men who post selfies showed more of a need to be seen as popular than women who posted selfies.

Chock said posting selfies on social media is not all that different from what people have done for many years. On trips and special events, our parents and grandparents used cameras instead of phones to take photos. They would bring back photos to show friends and family. You had no choice but to look at them. You probably commented about how nice everyone in the photos looked, especially children and the person showing the photos. They were happy to hear your comments. That was the old way of "clicking like". On social media, however, people can decide not to look at photos — even if they click "like".