Scientists found that moderate (适度的) noise can make people more creative, The New York Times reported.

    Scientists did tests on students. They divided them into four groups. They then asked the students to do certain tasks involving creative thinking. But each group did the task with different volumes (音量) of background noise. They found that students did best when working under moderate noise—70 decibels (分贝). This is about the same volume of background noise in a cafe. Students did worse in low noise (50 dB). This is the volume of a quiet room. They did the poorest when in a high-noise (85 dB) environment. This is the noise level in a factory.

    Moderate noise can distract (分心) people just enough so that they think more creatively. "It helps you think outside the box," Raci Mehta, a lead researcher in the study, said to the Business Standard. On the one hand, working in a very quiet place can strengthen our focus. But it also stops

    us from thinking abstractly (抽象).

    "This is why if you are too focused on a problem and you can't solve it," said Mehta, "you leave it for some time and then come back to it and you'll get the solution."

    However, the scientists said that when you need to do detailed things, like proofreading (校对) a paper, a quiet place is better than a noisy one.

    I'm sure you all know how important recycling is. Recycling is when you take old things and turn them into new things. It sounds like magic. But it's actually very scientific.

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When it comes to traveling, most people would choose to go with their families or friends. But now, many are choosing new travel. buddies--their pets. Zeng Qingbin is one such person. Over the past eight years, the 35-year- old from Hangzhou, Zhejiang province, has traveled across the country with his dogs--a Shiba Inu named Chai Chai and a Labrador retriever called Ba Bao. In Zeng's eyes, these dogs are like his children. "I've always dreamed of letting them run freely on wide grasslands with snow-capped mountains in the background," Zeng said. 

As-traveling with pets becomes more popular in China, related services are also growing. 

Zhang Wei, who specializes (专门从事) in pet hiking, has organized about 180 pet trips since 2022. Each trip usually includes two to five professional guides for groups of up to 30 owners and their dogs. " ★  and all the guides are trained to deal with various emergencies (紧急情况) in the mountains," Zhang said. What's more, Zhang's team asks pet owners to fill out a form about their dogs to provide a better service before a trip.

At the same time, airlines have begun offering charter (包租) services for pet owners to travel across the country and even internationally. 

On June 14, China's first outbound (出境的) charter flight allowing pets landed at Shanghai Pudong International Airport after taking 60 tourists and 18 pet dogs to Thailand. There will be more trips to South Korea, Southeast Asia and Europe. 

Though pet tourism is still in its early stages and faces many challenges in China, it is becoming a promising area for exploration in the tourism industry (行业), experts said. 

Nigeria is a hot and dry country in Africa where electricity is not available to many homes. Most people grow and sell their own fruit and vegetables. Keeping them fresh in the hot place is a real challenge. Without a fridge, most fresh food goes bad in a couple of days. Throwing away the food means losing money for poor families. Eating the bad food causes serious health problems. 

Local teacher Mohammed Bah Abba was worried about this problem and decided to solve it. As a boy born into a family of clay pot（陶罐）makers, Mohammed knew that these traditional clay pots could keep water even when dry. In the 1990s he used this traditional knowledge and his understanding of science to invent a cooling system（冷却系统）. It worked as a"desert fridge". 

Mohammed's cooling system is made up of two pots —a small pot inside a larger pot. In the space between the two clay pots, there is wet sand. People put the fruit and vegetables in the smaller pot, and cover it with a wet cloth（布）. Then they leave the larger pot in a dry place. When water from the sand evaporates（蒸发）, it causes the temperature in the pots to go down. This way the food in the smaller pot is cool. 

With the pot-in-pot cooling system, food stays fresh much longer. Mohammed's "desert fridge" has improved the lives of thousands of people. So in 2001 he won the Rolex Award for Enterprise, which is for the people who try to make the world a better place.