World Elephant Day is the perfect time to find out more about these amazing animals and what we can do to preserve them so they do not go the way of the mammoth（猛犸象）.

    World Elephant Day was created in 2011 by two Canadian filmmakers Patricia Sims and Thailand's Elephant Reintroduction Foundation and was first celebrated on August 12, 2012. They made the documentary Return to the Forest, a fascinating 30 minute film about the reintroduction of caught Asian elephants to the wild.

    Currently, the demand for ivory（象牙）is becoming bigger and bigger, whose price is higher than that of gold, making elephants bigger targets than ever. Habitation loss is also a danger to the world's elephant population as it robs elephants of the hundreds of pounds of food they need every day, making it more difficult for them to breed and making it easier for hunters to track them down. Circuses and tourism are also serious threats to the animals' well-being.

    The best way to celebrate this day is to take the opportunity to educate yourself about these magnificent（巨大的）mammals and share your knowledge with others. As ever, simply spreading the word about the dangers these magnificent mammals face via social media can actually make a real change. Expose that “training” elephants often involves tying and beating them daily for months on end. If you want to get a bit more involved, you could choose to make a donation to a foundation dedicated to protecting elephants from hunters or relocating them to locations better suited to their needs.

    Whichever way suits you best, make sure that you spend this day in a way that helps elephants all over the world, so we, in turn, can continue to wonder at them and their uniquely fascinating way of life.

    Six months ago,Jack came to china to study.He has heard that Yanghou is famous for its gardens. And he plans to visit some gardens in July, so he has collected information about them online as follows:

    The Slender West Lake named National AAAAA Tourist Area in 2010, includes the Great Rainbow Bridge, the White Pagoda, Five-pavilion Bridge, the Twenty-four Bridge, the Small Golden Hill and so on. The best time to tour the Slender West Lake is in March. During the visit to the park, the boat travels on the water and visitors travel in the picture.

    Ticket: Mar. - May. ¥ 150; Other months ¥90

    Time: 8:30 - 17:00

    Bus: No. 4, 5, 6, 17, 61 buses

    Tel: 0514-87357803; 0514-87370091

    Website: http://www.shouxihu.com

    Ge Garden, one of the four lop famous Chinese gardens, got its name from bamboo. The bamboo in the garden forms the green scenery. The centre of the garden is well known for man-like hills. Four seasons can be experienced here at a time.

    Ticket: Mar. - May. ¥ 10; Other months ¥30

    Time: Mar. - May. 7:15 - 18:00; Other months 7:15 - 17:30

    Bus: No. 8, 30, 61 buses

    Tel: 0514-87935285

    Website: http://www.gy-garden.net

    He garden, the most famous garden in the late Qing Dynasty, is known for its long double-way corridor(走廊), which is regarded as the earliest footbridge.

    Ticket: Mar. - May. ¥ 40; Other months ¥30

    Time: 7:30 - 17:15

    Bus: No. 19, 61 buses

    Te: 0514-87900345; 0514-87222353

    Website: http://www.he-garden.net

    A good disguise keeps you hidden, right? Well, sometimes the best disguise is actually the most dazzling because research reveals that flashy metallic iridescence(金属彩虹色) can visually puzzle predators, which allows colorful prey to survive another day. Those surprising results appear in the journal Scientific Reports.

    Shining iridescent color, which changes depending on the angle from which it's viewed, is favored by everything from birds to beetles and blossoms to butterflies.

    "And in our research group we are of course interested in why this vivid metallic color is so widespread in nature." Karin Kjernsmo of the University of Bristol adds that in some cases the showy splashes of light are a sexual strategy. " Here I would like to point out that in some species, particularly those that display strong sexual dimorphism(雌雄两性), such as birds of paradise or some butterflies or fishes, the occurrence of iridescence is most likely driven by sexual selection. For example, in many of these cases it is the males that have these vivid iridescent colors and they use them in mate choice or they use them as a signal to attract mates."  But iridescence also shows up in situations where reproduction is not an issue. " So what we are studying now is whether natural selection imposed by predation(捕食行为) could explain the occurrence of iridescence in prey animals."

    The idea that eye­catching colors could be used as a cover­up isn't a new one." The father of camouflage theory, Abbott Thayer, really believed that iridescence should be categorized as a camouflage strategy. And he wrote in his famous lifework Concealing­Coloration in the Animal Kingdom, already in 1909, that 'brilliantly changeable or metallic colors are among the strongest factors in an animal's concealment'. And this sounds like a completely unreasonable thing to say, because how can colors that are both brilliant and changeable contribute to animal's concealment？"

    "In a similar way, we were asking whether iridescence, due to its changeability, could work as a form of camouflage by preventing shape recognition." Kjernsmo and her colleagues trained bumblebees to associate a particular shape—a circle or an oval—with a sugar reward. And they found that the bees, when given a choice, would preferentially visit the shape they knew to be sweet. But when the shapes were iridescent, the bees had trouble telling them apart. "It seemed that the strikingly iridescent surfaces on our targets visually broke up the otherwise recognizable shape of the targets, which made them hard to distinguish." As for making use of this method for hiding in plain sight, "Any practical applications is of course directly linked to any industry that has an interest in camouflage, that is how to conceal objects or make them more difficult to recognize." The researchers are currently conducting experiments with birds, which often prey on iridescent insects to see if it helps to have a bird's­eye view.

    In 2013, Gabby Frost founded Buddy Project when she was 15. At that time her best friend had been diagnosed(诊断)with a mental health condition, and that was the first time she was made aware of what mental illness was. She wanted to learn more and develop a good support system for her.

    Mental illness affects tens of millions of people in the United States each year, yet only half receive treatment, according to the National Institutes of Mental Health. Buddy Project's website says the service is not a substitute for therapy( 治疗)or other types of mental health care, and it directs people to resources for further help.

    Since founding the organization as a high school student, Frost has helped more than 200, 000 participants find a new friend. On the day when Buddy Project was launched, she used her powerful social media presence to attract nearly 3, 000 participants. "This was around the time when teens really began talking about mental health and found a supportive community online to talk about it,"she said.

    One of the biggest social barriers she had to jump over was that people didn't view her seriously because she was a 15-year-old girl, and even now, she's still a young woman. "Sometimes it's frustrating because people don't think what I do is needed or they don't think I'm professional" she said. "Most people are blown away that a 20-year-old girl is running this and that it's one person doing this but not a whole team. I'm just lucky that I've found a support system that has been able to help my mom and me with the project.

    Let's look at the movies we can't wait to watch in 2019:

    Dumbo (March 29)

    Dumbo is a 1941 American film produced by Walt Disney Productions. The main character is an elephant who is nicknamed "Dumbo". Dumbo is always laughed at for his big ears, and he is rejected by the other elephants. With no parent to care for him, he is alone. But in fact, he is capable of flying by using his ears as wings. A live-action adaptation of the film directed by Tim Burton is scheduled to be released on March 29, 2019.

    Shazam! (April 5)

    Shazam! is an upcoming American superhero film based on the DC Comics character of the same name. Directed by David F. Sandberg, the film is set to star Asher Angel as Billy Batson, a teenage boy who can transform via the magic word "Shazam" into an adult superhero, played by Zachary Levi. It will be the first film version of the character since the 1941 series Adventures of Captain Marvel (the character's original name).

    Aladdin (May 24)

    Aladdin is a fictional character and the role of the film Aladdin (1992) based on Aladdin, a folk tale of Middle Eastern origin. He is voiced by Scott Weinger, while his singing voice is provided by Brad Kane. Aladdin never received a formal education, and has only learned by living on the streets of Agrabah. He has to steal food in the local market in order to survive. Mena Massoud is set to play a live-action version of the character in a live action adaptation of the 1992 film.

    Godzilla, King of the Monsters (May 31)

    Godzilla, King of the Monsters is a 1956 Japanese-American science fiction film, co-directed by Terry O. Morse and Ishiro Honda. It is a heavily re-edited American adaptation. For this new version of Godzilla, some of the original Japanese dialogue was translated into English, and some of the political, social and anti-nuclear themes were removed completely.

    If you walk through the doors of one of the Smithsonian Institution's museums in Washington, D.C., you may be greeted by an unusual guide. A Japanese tech company recently sent 25 humanoid robots to the Smithsonian. All of them are named Pepper.

    Each Pepper stands 4 feet tall and has a computer screen attached to its body. Built by SoftBank Robotics, the robots are programmed to share information about the museum in which they are based.

    "Pepper is basically an experiment," Goslins, director of the Smithsonian's Arts and Industries Museum, said. "The idea is to explore and see how a robot performs in this kind of environment."

    Museum visitors communicating with Pepper. The robot can tell stories and answer basic questions. People even take pictures and dance with it.

    "The robot draws big crowds," said Allison Peck, director of marketing at the Hirshhorn. "People just love Pepper."

    According to the Smithsonian Institution's website: "Pepper gives our museum workers a new way to reach and serve visitors." For example, Pepper teaches Swahili words to visitors of the "World on the Horizon" exhibit at the Smithsonian's National Museum of African Art.

    Pepper also has the special ability to draw guests to less-visited areas of the Smithsonian's museum. When Pepper is placed in a spot, crowds are attracted to that place.

    When not educating museum visitors, Pepper stays in the Smithsonian offices, getting charged and programmed. After being charged, Pepper can run for about 8 hours at a time.

    Pepper plays an important role, but the robot "is not meant to take away human jobs at the museum," Goslins explained. "It is meant to give our visitors a more enjoyable experience while they are here with us."