【推荐3】Nothing draws attention to your new product like using it to send fast food into space. In June, Arizona-based World View demonstrated the potential of its pioneering stratollite--a sort of mini satellite that uses a balloon to take goods into the stratosphere (平流层)--by partnering with

KFC to ferry a 5-ounce piece of fried chicken 77,000 feet into the desert sky. “We took a chicken sandwich, launched it into space for 17 hours, and when it came back, it was perfect,” says World View CEO Jane Poynter.

Poynter’s final goal is to send tourists to the edge of space, tied to the company’s balloons, and to make the final frontier more accessible for research. Stratollites are inexpensive, compact, and easy to operate, ideal for monitoring weather patterns and providing military reconnaissance （侦察） or emergency communications during natural disasters. They can also do what traditional satellites can’t: spend months above a specific location without moving.

Though Poynter did not formally train as an engineer, she has spent her career in leading space research. The British native trained her skills as a technical manager while part of Biosphere 2, an Arizona research facility built to test a self-enclosed, self-sufficient ecosystem. Its creators hoped it could one day be adapted for use in space. She spent two years in the early 1990s sealed inside with seven others, experiencing everything from oxygen failures to colleagues’ emotional breakdowns.

Poynter met her future husband, Taber MacCallum, on the project, and afterward, the couple formed Paragon Space Development. They began devising biospheres that could support plant and animal life in orbit （太空轨道）.

“We showed it’s possible for animals to live in an environment they are not used to: microgravity,” Poynter says.

In 2014, Poynter and Maccallum achieved another first. They led the engineering team that helped former Google exec Alan Eustace skydive from the edge of the stratosphere. That’s when it hit them: The balloon-parachute system they designed for Eustace could be modified for tourism and research. So they formed World View, with MacCallum serving as chief technical officer.

The company has a contract with NASA to determine if the system could someday be used to gather data on Mars. “Taking stratollites and flying them on other planets,” Poynter says, “that’s definitely a part of the big dream.”

【推荐1】“You’ll get square eyes!” my mother used to say as I sat for hour after hour glued to the TV. I ignored her, of course. Past-forward a few decades and now I’m the parent. My 5-year-old lives in a world where screens aren’t fixed pieces of furniture. You can’t even avoid them by going outside. Screens are not only in our pockets; they’re everywhere.

The concerns have grown with the screens. In the past decade, we have heard that they will damage our mental health. Many of us feel more distracted by them, feeling guiltier and more tired as a result.

The apps and websites we can access on our phones have also sparked widespread concern. Big tech companies are also good at making use of our need for social recognition, hooking us on likes, retweets and follower counts. Social media has created a culture of mass narcissism (自恋), which has led many to worry about the emotional stresses on teenagers. A quick online search brings up dozens of papers linking screen use or social media with harmful effects on mental health, including depression and suicide.

Such statements are alarming. They are also widely believed, thanks to popular books like iGen by Jean Twenge, which claims that digital technology has ruined a generation. Yet, Amy Orben at the University of Oxford, who studies the impact of digital technology and social media in particular on mental health, holds different views. She claims that the underlying data can be used to tell different stories. She also spotted shortcomings in several large studies that claimed to show correlations (相关性) between the use of devices with screens and depression in users.

Twenge stands by her own finding, pointing in turn to what she considers flaws in Orben’s research methods. For David Max, at Royal College of Child Health in London, the effect of screen time and social media use on mental health remains speculative. “We cannot regard social media overall as good or bad,” says Davie. “We don’t know whether in individual cases social media is not responsible,” he says.

The explosion of mobile phone use has revolutionized our lives. I can download movies, write articles, communicate with my family and broadcast to the world all at the push of a button. Rather than impose constraints (限制), we should take a look at our use of screens and ask how they fit with the activities and lifestyle.

Every new technology with widespread impact has given rise to new fears. So the best bet may simply be to ask yourself what level of screen use makes you and those around you happy and try to stick to it. If you find yourself over addictive, don’t panic—and certainly don’t feel guilty. Nobody knows anything worth getting scared about.

【推荐2】Outside， it's a cold winter's day． Inside a large shopping center， people are hanging around． But then， without warning， a pop song starts to play loudly． A teenager boy walks lazily to the center of the open space， and dances crazily to the music． He's joined by two of his friends， then some of the old people． Within the space of a few seconds， more than sixty people are dancing to the music - all in time and all in step． At first， onlookers are baffled， then they start smiling and clapping． They now know what they're seeing： a flash mob （快闪）．

According to Wikipedia， the term "flash mob" was created by Bill Wasik， an editor at Harper's Magazine， in 2003． Within a year， the phrase had entered the Concise Oxford English Dictionary． Since then， hundreds - possibly thousands - of flash mobs have been carried out around the world， in almost every kind of public space imaginable!

Each flash mob has its own style， but most flash mobs follow a similar formula （方案）． Often， the organizers search for willing participants using social media． Instructions and dance moves are given through email or video download． There are usually several rehearsals （排练） before the big day．

While it's happening， a few lucky passers-by watch it live． Most people who watch it， however， will see it later online． Some of the most popular flash mobs on YouTube have been watched more than 10million times． A famous example is MP3Experiment Eight， a flash mob that took place in New York City in July 2011 with over 3，500 participants． This event differed from normal flash mobs in that much of it was completely silent - and there were no rehearsals．

Flash mobs provide the participants， onlookers and online viewers with a lot of enjoyment and pleasure． For this reason alone， they're a modern， popular art form that should be celebrated．

【推荐3】Animals are natural resources that people have wasted all through our history. Animals have been killed for their fur and feathers, for food, for sport, and simply because they were in the way. Thousands of kinds of animals have disappeared from the world forever. Hundreds more are on the danger list today. About 170 kinds in the United States alone are considered in danger.

Why should people care? Because we need animals. And because once they are gone, there will never be any more.

Animals are more than just beautiful and interesting. They are more than just a source of food. Every animal has its place in the balance of nature. Destroying one kind of animal can create many problems.

For example, when farmers killed large numbers of hawks(老鹰), the farmers stores of corn and grain were destroyed by rats and mice. Why? Because hawks eat rats and mice. With no hawks to keep down their numbers, the rats and mice multiplied quickly.

Luckily, some people are working to help save the animals. Some groups raise money to let people know about the problem. And they try to get the governments to pass laws protecting animals in danger.

Quite a few countries have passed laws. These laws forbid(禁止)the killing of any animals or plants on the danger list. Slowly, the number of some animals in danger is growing.

【推荐1】Henderson Island in the South Pacific Ocean has always been known for its remarkable biological diversity and untouched ecology. Now, the remote UNESCO World Heritage site that lies 3，100 miles from the closest human settlement can also lay claim to being one of the most polluted places on Earth.

Jennifer Lavers, a researcher from the University of Tasmania’s Institute for Marine and Antarctic Studies who has been studying the island for a few years, says the tiny island is home to over 38 million pieces of waste.

The amount of waste is surprising given that the island, the largest of the group of four Pitcairn volcanic islands, has no residents and is visited by scientists only once or twice every decade. However, as it turns out, humans do not need to be physically present to pollute an area. In this case, the waste is brought in by the South Pacific Gyre, an ocean current that sends garbage moving through the sea to Henderson.

What’s even worse is that the unsightly rubbish scattered (分散)across the island’s sandy beaches is just the tip of the iceberg. According to the researchers, over 68% of the waste is buried under the sand. This means their estimates, based on the waste found up to 10 centimeters below the sand, may be underestimating the full extent of the pollution.

Besides being aesthetically(审美地) unpleasing, the waste is also harmful to the island’s wildlife. Lavers and study co-author Alexander Bond discovered sea turtles that come to the island to lay eggs caught inside fishing lines. The waste is also harmful to seabirds and fish that mistake the colorful plastic pieces for food.

Environmentalists like Boyan Slat, who founded The Ocean Cleanup in 2011 after discovering “more bags than fish” while diving in Greece, are trying to clean up the mess. However, their efforts will only make a difference if we all join them by avoiding plastic altogether or reusing and recycling.

Unless we find ways to change the situation, this ever increasing pollution will cause a serious risk to the health of our planet and all its residents, including humans.

【推荐2】In 2016, a young British father was trampled（踩踏）to death by an elephant on the island of Koh Samui in ThaiJand. The tragedy once again raised questions over whether it is ethical to use elephants as entertainment.

For many visitors, the chance to interact with elephants is at the top of their holiday wish list. There's no shortage of opportunities to do so, from taking photos of baby elephants to riding them through the jungle, to watching them dance.

But what most visitors don't realize is elephants are involved in extremely cruel methods to make them behave. They are often kept in terrible conditions. This includes being chained up when not performing, without interaction with other elephants, a poor diet, etc. They are also subjected to training practices including beatings. Away from their natural habitat and forced to repeat the same routines day in day out, which continues throughout their dramatically-shortened lives.     

Unfortunately, riding elephants is still one of the most popular tourist activities in Asia. The World Animal Protection investigated 3,000 elephants at tourist sites across Southern Asia in 2017. The study found that 77% of them were living in "severely cruel" conditions. It also found that there had been a 30% rise in the number of elephants at tourism venues in Thailand since 2010.

Many parks advertise themselves as sanctuaries (庇护所)but they aren’t. Real sanctuaries will limit contact with the elephants and visitors can only observe them from a distance most of the time.

The government needs to play a much bigger role in putting an end to elephant tourism. As travelers, please avoid any place offering riding or allowing interacting sessions with elephants. When you see abuse happening, do your bit by leaving your review on review sites and social media to warn other tourists. Many parks are now becoming ride-free as a result of pressure from tourists, the industry and the media.

【推荐3】Teachers and students at Herbert Slater Middle School in Santa Rosa, California are used to seeing 7^th grader Raquel Zuniga holding a stuffed Kermit the Frog doll as she goes about her school day.

Raquel, aged 12, attends classes for students with mild to serious disabilities. Having her favorite frog doll Kermit by her side makes school life much easier for her, yet there are still times when Kermit’s cheery presence isn’t enough to help her through her anxiety.

One day Raquel was having a hard time changing halfway from inside the classroom to outside. Several teachers approached Raquel as she held Kermit tight and walked back and forth in the hallway, yet none could get through to the child. After nearly an hour, school resource officer Chris Morrison happened to wander by to see if she could help.

Chris herself was a teacher for high-risk students in Los Angeles for twelve years before joining the Santa Rosa Police. She’s now been on the job as a cop for eighteen years, but those teaching wisdoms still run deeply through her mind.

Without hesitation Chris approached the student and bean to speak to her in a comforting voice. Chris did something simple yet extraordinary: she began to sing. Not only does music have a calming effect on its own but also the song she selected was especially meaningful: “Rainbow Connection”, the 1997 song made famous by Kermit the Frog himself.

Raquel’s face lights up in a beautiful smile as she turns to her teacher as if to say, “She’s singing my song!”

“The three of us were standing there in awe,” said Assistant Principal Jessica Romero, adding that she wasn’t the least bit surprised that this kind act came from Officer Morrison. “She’s a very special soul,” Jessica explained. “She comes to everything she does with heart, with empathy, and is able to build close relationship with students.”