Since 2008, hunters have illegally killed more than 3000 rhinos in South Africa. The International Union for Conservation of Nature warns that rhinos may die out by 2026. People who hunt and kill illegally are called poachers. The most effective way to watch for and prevent illegal hunting is from the air. However, piloted flights are too costly. Fortunately, some Spanish college students have invented a drone (无人机) that can observe more places than a plane.

    Arnau Garcia is an aeronautical (航空学的) engineering student at the Polytechnic Institute of Catalonia, in Spain. He says observers from the air have trouble finding poachers when they hide under the trees. Mr. Garcia and other students have worked with the drone manufacturer HEMAV to help find the hidden poachers. They make it by using the thermal camera, which is especially sensitive to body heat. Even when the poachers keep still, it can also keep track of them.

    The drone can fly in the wind up to 55 kilometers per hour. It has an autopilot system, so it memorizes the flight path. The drone also has a microphone, a video camera and a GPS system. These permit it to report accurately where a picture is taken. After each flight, the drone can bring back detailed information about where rhinos are found, the conditions of water and plants in the area, and the positions of suspected poachers.

    Experts say the drone can fly as far as 70 kilometers from the base. It means that it could quickly observe large areas for poachers. However, the same search operation would take days for human observers. Thanks to the drone, many poachers have been caught and the number of rhinos is on the increase. In addition, HEMAV has received an increasing number of orders for the drone. Even South African national park officials attempt to fill the air with drones.

Food festivals around the world

Stilton Cheese Rolling

    May Day is a traditional day for celebrations, but the 2,000 English villagers of Stilton must be the only people in the world who include cheese rolling in their annual plans. Teams of four, dressed in a variety of strange and funny clothes, roll a complete cheese along a 50-metre course. On the way, they must not kick or throw their cheese, or go into their competitors' lane（赛道）. Competition is fierce and the chief prize is a complete Stilton cheese weighing about four kilos (disappointingly, but understandably the cheeses used in the race are wooden ones). All the competitors arc served with beer or port wine, the traditional accompaniment for Stilton cheese.

Fiery Foods Festival—The Hottest Festival on Earth

    Every year more than 10,000 people head for the city of Albuquerque, New Mexico. They come from as far away as Australia, the Caribbean and China, but they all share a common addiction—food that is not just spicy（辛辣）,but hot enough to make your mouth burn, your head spin and your eyes water. Their destination is the Fiery Food and BBQ Festival which is held over a period of three clays every March. You might like to try a chocolate-covered habanero pepper—officially the hottest pepper in the world—or any one of the thousands of products that are on show. But one thing's for sure—if you don't like the feeling of a burning tongue, this festival isn't for you!

La Tomatina—The World's Biggest Food Fight

    On the last Wednesday of every August, the Spanish town of Bunol hosts Ea Tomatina—the world's largest food fight. A week-long celebration leads up to an exciting tomato battle as the highlight of the week's events. The early morning sees the arrival of large trucks with tomatoes—official fight-starters get things going by casting tomatoes at the crowd.

    The battle lasts little more than half an hour, in which time around 50,000 kilograms of tomatoes have been thrown at anyone or anything that moves, runs, or fights back. Then everyone heads down to the river to make friends again—and for a much-needed wash!

    For the brave in the army, being sent away from home is just part of the duty. However, it's never easy especially for those with children. So, when I found out I was going to stay in South Korea for a year, I was nervous about how my five children, particularly my eldest daughter Abigail, would take the news since it meant I wouldn't be home to see her graduate from high school.

    To my surprise, Abigail told me not to worry and even suggested we make the news known among family members. "We've been lucky you haven't had to be sent abroad yet. Anyway, we can get connected through the Internet. See me on your phone." Abigail said. She stepped into many of my roles when I was gone. I wanted to find a way to thank her and show her how proud I was of her. I started planning the special surprise when my request to return home a few weeks earlier to attend Abigail's graduation ceremony(典礼) was approved.

    When my time in South Korea finally came to an end, I flew home, and stayed in a hotel. On Abigail's graduation day, I hid in an office behind the stage waiting until I heard her name called. I just kept thinking "Don't cry. Don't trip in your heels. Don't fall over." At last! Abigail was up on stage. I slipped up behind her, whispered in her ear, and around she turned! "I was just thinking, like, 'You aren't supposed to be here. What? What? How?' It was the biggest shock... I'm pretty sure my dad made people he didn't even know cry. Emotional for everyone." Abigail cried.

    You know what followed: embraces, kisses, tears, laughs, flowers, wishes...; aren't they what a family have in store?

    Educational APP Store

    Duolingo

    Duolingo is regarded as one of the best English language apps today, which is strongly recommended for English amateurs. The system of the app helps you learn English quickly by spending twenty minutes a day. Duolingo structures your lessons that teach you about seven new words based on a topic and skill points being awarded for completing the lessons.

    Busuu

    Busuu helps you learn English language on the go and the lesson's quality is guaranteed as it is based on CEFR language framework. Lessons range from beginners to advanced learners. Busuu is actually a great English app if you want to improve your spoken English by talking with native speakers.

    Memrise

    Memrise uses some creative and easy ways to memorize English words. The focus of this app is to help the users expand their vocabulary by learning English words in an effective way. Memrise also offers an offline mode to continue learning without Internet connection.

    Rosetta Stone

    Rosetta Stone is designed differently from average language apps on the marketplace today. It's trying to teach us English the way we'd learn it, as if we were children starting to learn the language. Furthermore, it has exercises designed to help you learn basic words. A variety of lessons are offered that Rosetta Stone has been using for years.

Dunhuang,an  oasis(绿洲) in the Taklamakan Desert,used to be a major stop along the Silk Road,but is now mainly a fascinating tourist destination.

Those interested {#blank#}1{#/blank#} Dunhuang's colorful history will be attracted by the Mogao Caves,one of the city's main attractions.The entrance to each cave {#blank#}2{#/blank#}(block)by a locked door,which can only be opened by expert guides.Behind these doors are caves of all {#blank#}3{#/blank#}  (size)—from very small to absolutely huge.The caves contain thousands of priceless manuscripts and silk paintings,which,upon their discovery,drew much  {#blank#}4{#/blank#}(attend)to the  area.  Also,there  are  few  things  as  special  as  walking  across  the  desert  oasis  at  sunrise.  {#blank#}5{#/blank#} (catch)this  incredible scene,you must rise early.It's bitterly cold.But as the sun rises atop the golden dunes(沙丘)and paints a {#blank#}6{#/blank#} (true)picturesque  scene,all  your  efforts  pay  off.Sunset is a popular time for a camel ride.Get off the camels  {#blank#}7{#/blank#}walk up a rather steep dune overlooking Crescent Lake.From this position, {#blank#}8{#/blank#}(regard)as the best one,the incredible sunset is awe-inspiring.

No trip to Dunhuang is complete without visiting the Dunhuang Museum,{#blank#}9{#/blank#} it's possible to put all of the city's historical sites into proper historical context.The museum is expansive, {#blank#}10{#/blank#} (contain)many original  artworks.Here,you are bound to be amazed by Dunhuang's rich culture.

Why do you like the music you do? You would think that it is because of the music itself. But that's only half the story. Surprisingly, the other half of the story doesn't have much to do with music at all. By analyzing the public personalities (个性) of famous musicians, and the personality traits of their fans, a group of researchers found that people prefer the music of artists whose public personalities are similar to their own. 

In three separate studies of more than 80,000 people, the researchers looked at several factors: personality ratings of 50 of the most famous musicians, listener reactions to music, and the lyrics in the artists' music. The musicians studied were different, ranging from Paul McCartney, Bob Dylan, Elton John, Whitney Houston, The Rolling Stones to Beyonce, Coldplay, Dave Matthews Band, Maroon 5, Taylor Swift, and Ozzy Osbourne. 

The results from the three studies show that the fit in personality between the listener and the musician predicts musical preferences. It's important to note that the public personalities of the musicians were measured, not their real personalities. The findings show how music gives fans a sense of pride and belonging to a social world. Even more, the results shed light on the evolutionary (进化的) origins of music, which say that music evolved as a way to communicate groups' characteristics which helped groups decide whether or not to work with each other. All of those make the findings a major advance in this area of research.

The findings are showing us how music can be a common denominator to bring people together. They can also pave the way for a new approach for record companies to attract audiences. Besides, the findings can be applied to situations involving mental health. For example, in times of stress and uncertainty, listeners can seek music of artists with similar personalities to themselves and feel understood and a sense of connection.