5 . Carol Dweck, a psychologist at Stanford, conducted a study in twelve different New York City schools. She gave more than 400 fifth graders a relatively easy test consisting of puzzles. After the test, the researcher told the students their score, and provided them with a single line of praise. Half of the kids were praised for their intelligence. "You must he smart at this, " the researcher said. The other students were praised for their effort: "You must have worked really hard."

When Dweck was designing the experiment, she expected the different forms of praise to have a rather modest effect. After all, it was just one sentence. But it soon became clear that the type of compliment given to the fifth graders has a dramatic effect.

Then Dweck gave the same fifth graders another test that was designed to be extremely difficult. Both groups made unavoidable mistakes. After the second test, the students were given the option of looking either at exams of kid who did worse or those who did better. Students praised for their intelligence almost always chose to increase their self-esteem(自尊) by comparing themselves with low-performance students. They wanted to understand their mistakes, to learn from their errors, to figure out how to do better.

Praising kids for their intelligence encourages them to "look" smart, which means that they shouldn't risk making a mistake. And this fear of failure ran actually prevent learning. Unless we experience the unpleasant symptoms of being wrong, directing our attention to the very thing we'd like to ignore, the mind will never revise its models. We'll keep on making the same mistakes, trading self-improvement for self-esteem. Samuel Beckett had the right attitude: “Ever tried. Ever failed. No matter. Try Again. Fail again. Fail better."

6 . Four Interesting Science Museums

Polytechnic Museum, Russia

For many guests of the capital, some of the most vivid childhood memories are associated with this museum. A variety of technical fields are presented in 65 halls-Mining, Space, Energy, and Transportation, etc. And the exposition（博览会）is the only museum project in Russia about the history of the bike. The interactive division "Technoplay" is open, where you not only can but also need touch most of the exhibits with your hands. In addition to self-experimentation, for personal requests the museum's experts will show many entertaining experiments.

Eureka, England

The Eureka educational center is a huge complex where modern science and technology are becoming clear, even to kids. The main exhibition is devoted to the human body, the laws of physics and natural things. Visitors can obtain energy or create paper with their own hands. On the area of the Eureka educational park there is a botanical garden and a collection of minerals from the rock types of Finland is presented there.

Deutsches Museum, Germany

In this museum you can see more than 100 thousand different items from windmills（风车）to medical equipment. All aspects of industrial production appear before the eyes. Several museum rooms are arranged especially for children-there are exhibits that entertain kids starting from three.

NEMO, the Netherlands

The largest Dutch research centre stands ready to share its secrets with everyone. This immersion（沉浸）in the world of science and technology will not be dull. All significant information is presented in the form of exciting games. All exhibits are interactive; visitors are allowed to touch, pull and press on anything. The museum is for children from 6 to 16, as well as for their parents-it will be interesting to all.

7 . Megan Piontkowski, an artist and illustrator, was out of work due to the pandemic (流行病). She learned through a friend that a Brooklyn hospital needed fabric masks for workers. Piontkowski already had some fabric on hand and a sewing machine, so she got to work. She washed the fabric, sewed masks, washed them again, and hung them to dry. After that she drove them to the hospital. When she asked if the hospital would pay for the masks. she was told they had no money.

“I felt very mixed about it,” she told VOX, a famous American TV station. She knew the hospital needed masks badly. But meanwhile, “I’m out of work and I 'm being asked to donate them.” “The fact that she wasn't compensated(补偿) for sewing highly necessary items felt like a ease of traditional ‘women’s work’ not being valued,” Piontkowski said. While larger companies have begun massive cloth masks in recent weeks, much of the work of making the protective clothes, especially in the early stages of the pandemic, was done at home-often by women. That gender breakdown is continuing in some volunteer efforts-about 85 percent of the around 70 volunteers sewing masks for the New York City-based group Face Mask Aid, for example, are women.

And masks are only part of the story. The demands of daily life during the coronavirus pandemic are many, from shopping for food shortages and virus fears to caring for children when schools and day cares are closed. And in many cases, women are the ones figuring out how to meet those new demands. Some women are still working outside the home a essential workers but shouldering care responsibilities when they get home.

It doesn’t have to be this way. With more men going into tasks like cooking and educating children, it is potential to reset gender norms. “The pandemic is potentially sparking new conversations about divisions of labor,” Jill Yavorsky, a sociology professor at the University of North Carolina, Charlotte, told VOX.

8 . With the Covid-19 virus sweeping the globe, the science on quitting smoking offers welcome news for smokers who want to build up their defenses in case they contract the virus. Though it may still take many months for a smoker's lungs to heal from damage caused by long-term smoking, your health can noticeably improve in the days and weeks after quitting in ways that could make a difference against the virus. Covid-19 creates an added sense of urgency, and there's enough reason to believe that quitting smoking during the pandemic（流行病）could increases your opportunities of fighting off the virus.

If you make the decision to quit, the cilia（纤毛）in your lungs are one of the first parts of your body to heal. These hair-like projections wave back and forth like a brush as air moves in and out of your lungs. They help your body fight off colds and infection. They also help clear mucus（黏液）, so if they're not functioning as well as they should, mucus can build up in the lungs. Your body's tendency to cough during an infection helps inspire the bodily process of clearing out mucus. That's vital in fighting the Covid-19 condition. The elderly are at a greater risk for too much lung fluid that often limits breathing following coronavirus infection because they don't have a strong enough cough to clear it up.

A second short-term gain from quitting smoking comes from reducing ongoing inflammation（炎症）in your body, which can make you infect Covid-19 more easily. Having your lungs in as good of shape as you can in case of a corona virus infection is key.

Besides lung-related issues, quitting smoking can also deliver healthy benefits to the heart that could help prevent possible heart attacks, which are another cause of death in Covid-19 cases. After you quit smoking, your blood becomes thinner and less possible to setting. Heart attacks are less likely. One reason this happens is because smoking makes it harder for the heart to distribute blood throughout the body.

9 . As Wilson Guarin watched the helicopter roaring above, he wondered if the men being lifted into the sky felt the risk had been worth it.

Moments earlier, Guarin and his children had hiked to Hermit Falls in Angeles National Forest, one of the most popular waterfalls in the Los Angeles area. Soon after they arrived, they saw a man dislocate his shoulder when he jumped into the rock pool at the base of Hermit Falls.   Less than a minute later, another man jumped and appeared to break both his legs. Guarin said the cliff jumpers' intentions were obvious. They wanted to get a video of themselves and post it to social media.

A thirst among hikers, often inexperienced and under-prepared, to collect "likes" and shares on Instagram and other social media sites has led to a significant increase in rescue missions by first responders.

The Los Angeles County Sheriff' s Department's Search and Rescue teams conducted 681 missions in 2017, the largest number in five years. It' s a 38% increase from the 491 rescues they did in 2013.

The teams' leaders say the single largest factor for that increase is people posting videos of extreme activities online. Then, without any thought about the difficulty, others try to recreate their own 15-second version of glory.

On Instagram, posts from visitors venturing to waterfalls and swimming holes in Angeles National Forest and other recreation areas show hikers changed into models, striking seemingly the same poses in the same places.

We shouldn't discourage people from enjoying the outdoors. But many accidents are avoidable and happen either when people go off trail or ignore official warnings about an area being closed and visit anyway.

Guarin still thinks about the two men he watched hitching helicopter rides to a hospital. "You get concerned about what people are willing to do - to not have fun. It's risking everything for no reason. "

Well, there are the "likes".

10 . Can you really lose your job for posting an opinion on Twitter, or even for clicking "like" on someone else's message？Pascal, an employment lawyer in the Netherlands, assumes that about one in ten laying-off is connected to behavior on social media.

Controversial opinions were once expressed in bars after work, and went no further. Today Twitter and other social media broadcast employees' thoughts, making it easy for anyone offended to put together a revenge（报复）against the poster and their employer.

Though it's not necessarily in companies' interests to allow the free expression of opinion, it's clearly in society's interest. Free speech is the foundation of democracy（民主）. In laying down clear rules, we should remember that offending and harassing（骚扰）are different. It's not reasonable for companies to try to prevent their employees from expressing displeasure at something, no matter how strongly others disagree-at least if that's not relevant to the job they do. But an employee who repeatedly makes unfavorable comments at work has crossed the line into harassment, and this should be grounds for dismissal.

There's also a difference between what people do at work and what they do outside. Speech is like a dress code. Companies can demand that their employees look the part at work. After people go home, though, they should express their opinions freely, just as they're free to change into jeans and T-shirt. A woman fired in 2004 by a housing firm for displaying a sticker backing John Kerry on her car was poorly treated. The situation is more complicated when it comes to public figures such as sports stars, who in effect sell their image as well as their labor.

Firms will try to preserve their freedom, but laws against unfair dismissal that protect speech will help them stand up to complaints from angry people. Geographical and technological spaces are increasingly separated, which makes it important that people tolerate different views at work, especially outside it.