1 . One thing that sets humans apart from other members of the animal kingdom is our tendency to develop customs and traditions. Here are some astonishing customs from around the world.

An odd custom associated with the United States is its complicated tipping culture. Unlike many other countries that don’t tip at all or that only tip in small amounts when the food is particularly good, tipping is actually mandatory at most restaurants in the US. To put it another way, customers have a duty to leave between 10-20 percent of the bill in tips. Wait staff rely on these tips for a living because legal wages for waiters are low. Furthermore, there are rules for tipping bartenders, delivery people and other service personnel. While some criticize this practice as irrational, there’s no doubt that tipping culture in the US gives an incentive for waiters and waitresses to provide better service.

Some countries find the act of pointing with the index finger to be rude. While members of most cultures would probably agree that pointing fingers, both literally and figuratively, isn’t exactly the nicest thing in the world, in countries like Malaysia and Indonesia, this gesture can be seen as incredibly offensive. Instead, it is customary to gesture towards things with the thumb as this is seen as a more polite option. In many countries in Africa, pointing is reserved for inanimate objects only, not people.

Most societies around the world have rules about table manners. For western cultures, noisily consuming food is considered rude. In Japan, however, making slurping(啧啧响的)sounds while eating has an entirely different meaning. This might have something to do with the fact that in western countries, noodles are properly consumed by twirling(缠绕)them on a spoon before putting them in the mouth. Meanwhile, the Japanese simply slurp up their noodles without contorting them first, an act that is naturally noisier than the former. Making slurping sounds when eating noodles in Japan is a way of indicating that you’re rely enjoying them. Some scientists even argue slurping invites air into the mouth and actually enhances the noodles’ flavor.

2 . The Best National Parks to Visit in Winter

While most parks tend to draw families in the summer and fall, there are also ideal spots for adventurous winter trips.

The country’s oldest and best-known national park takes on an almost otherworldly atmosphere in winter: the air filled with rolling steam, the strong colors of hot springs, the surrounding white landscapes, let alone the impressive wildlife during this time, like bison, wolves, and playful red foxes. Just book a guided hiking tour to get a ranger’s perspective on the park and local people.

With its giant red rocks and unique trees, you’ll feel like stepping onto a foreign planet as you spend hours hiking the Panorama Loop or Maze Loop. The park is recognized as an International Dark Sky Park, featuring virtually zero light pollution and the country’s best views of a starry sky.

A significantly lower number of visitors in winter means you can take in unblocked views of the South Rim, and get to see the rare beauty of the Grand Canyon dusted with snow. For those adventurous and daring, it is recommended to hike the Bright Angel Trail and take the chance to see the canyon’s wintertime wildlife, including mule deer, elk, and bald eagles.

Surprise! Not all wintertime national park trips need to involve snow. Virgin Islands National Park is most famous for its white-sand beaches. You can also hike inland to visit old sugar plantations, or venture out to the water to swim along with sea turtles and manta rays. You will definitely enjoy a different winter here.

3 . It was a February afternoon in a Brooklyn classroom. Sixteen-year-old Taylor Engler came face to face with a cow. But it was all in her head. She was transported by a virtual reality (VR) headphone. It took the Berkeley Carroll School junior and eight other classmates to a northern New York farm. The farm was 250 miles away. For students, the technology means field trips are no longer kept within the length of a bus ride.

It's unknown how many classrooms have or will use the technology, but experts say few classrooms do or will do. Headphones that require a user's phone can cost as little as $20 or $30, but systems and software for classes run into thousands of dollars. The problem of not having good software is disappearing as more companies enter the market. But the rules for use haven't kept abreast of the development of the technology. In New York, for example, virtual reality lab experiments are not included in the state's hands-on lab time requirements.

Experts say science classes are where virtual reality holds promise for classrooms. “The biggest problem, I think, is going to be how closely it mimics the real world." That's according to David Evans, the director of the National Science Teachers Union. However, he said, “The ability to do dangerous things and to run many, many more cases in a virtual space as opposed to the real physical space stands for a huge learning chance.”

Lamb taught chemistry and he agreed. “Too often in schools, when you do experiments in labs, you mix these together, you mix those together and you get this result. And if you don't get that result, you have done something wrong. But we don't have enough resources for you to redo it, “he said. “In virtual reality, all I do is hit reset on the computer. I don't have to actually use chemicals.”

4 . Eye Opener Volunteer

Description

For about 30 years, the Museum of Science Eye Opener Program has been working with the Boston Public Schools to bring the exciting world of science to second grade students from across the city. Each year, about 3, 000 students from over 45 Boston schools visit the museum to explore, ask questions and find answers. Since 1986, funds from the Germeshausen Family Foundation have supported the Eye Opener Program in providing a guided museum experience for second graders.

With the help of a large corps of volunteers, the program introduces these students to the museum and gives them a chance to engage in science. Eye Opener volunteers encourage exploration and the excitement of discovery as they share the museum with the children. They achieve these goals through conversation, hands-on experiments, exploration of exhibits, and Practicing scientific thinking skills with program participants.

Responsibilities

Each Tuesday morning, the students are grouped into sets of 4 to 6 with a pair of volunteers who give them a tour of the museum. Tours last about two hours and are tailored to the interests of the students.

Learn the lay-out of the museum to share and explore with second graders the exhibits which May be interesting to them.

Encourage children to observe, compare, describe, ask questions and share ideas.

Know museum emergence and safety procedures.

Work in close collaboration with a diverse group of volunteers.

Minimum Qualifications

● Patience, sensitivity, and understanding.

● Willingness to work with young children and high school students of all backgrounds and abilities.

● Interest in informal science education.

Additional details

Commitment: Four-to six-month commitment.

Time: Tuesday mornings (9:30-12:30) throughout the school year.

Training: Attendance at the New Volunteer Orientation session is required.

6 . According to the US economist Robert Gordon, all the “impressive stuff” has been created; we have run out of the big, life-changing ideas needed to encourage rapid economic growth and engineers are now only just making slight changes. Inventions such as mobile phones, Gordon says, have had less impact than, for example, the invention of indoor plumbing (管道系统).

But this is a misunderstanding of how engineers work. There is no “Wow!” moment. The development of new technology happens little by little. You build upon the work of those before you, thinking about what could be done better and what could be improved. It’s an unending task. Michael Faraday invented the first electric motor. But Faraday’s breakthrough followed William Sturgeon’s invention of the electromagnet (电磁铁), and Alessandro Volta’s invention of the battery before that. Faraday would have expected future engineers to pick up the baton (接力棒) later down the line.

Reduced energy supplies, increasing populations and mass urbanization keep clever young engineers awake at night. Those, for example, who enter the yearly James Dyson Award invent things that solve these problems and more. The 2012 winner Dan Watson designed a clever system of escape rings for fishing boat nets that deals with the issue of overfishing — not an exciting topic, but his invention is exceptional. Human inventiveness remains unreduced in the face of new global challenges.

Our problem is patience. We expect new technology at a rate like never before. I can’t tell you the world’s next big invention. Last week brought news that we’ve invented a new way to deal with antibiotic-resistant bacteria. Next week may bring a major development in another field. The biggest thing holding invention back is our impatience. With enough time and support, bright young engineers will develop exciting new technology to solve the world’s trickiest problems. Many have already begun.

8 . Table tennis may not seem a reasonable option for someone with no arms — but Ibrahim Hamadtou doesn't believe in limits. The 48-year-old Egyptian Paralympian breaks the barrier by holding the paddle (球拍) in his mouth and using his right foot to serve the ball.

Hamadtou, who lost his arms in a train accident at the age of ten, was drawn to table tennis after being challenged by a friend. "I was once watching a match between two of my friends," Hamadtou explains. "They disagreed on a point, When I counted the point in favor of one of them, the other player told me, 'Mind your own business as you will never be able to play.' It was that statement that fired me up to decide to play table tennis."

It took Hamadtou three years to master the sport. He says the biggest challenge was figuring out the best way to control his body. "I was trying first to use the bat under the arm, and I also tried using other things, which weren't working so well. Finally, I tried using my mouth. It took me nearly a year of practice to get used to holding the paddle with my mouth and making the serve. With practice and playing regularly, this skill was improved."

The Egyptian's incredible talent came to light in 2014 when he was awarded the best Arab Athlete of the year. He won a silver medal at the 2016 African Championships, qualified for his first Paralympics in 2016 at 43, and then again for the 2020 Tokyo Games at 48.

The inspiring athlete says, "The disability is not in arms or legs but to give up in whatever you would like to do."

9 . When I was in primary school, I was actually a little shy. One thing that really frightened me was speaking in front of many people, whether strangers or acquaintances (熟人). It was my sixth-grade teacher, Mr. Bamick, who helped me get past that. That year we had to make four oral (口头的) book reports in front of the class. Some of the kids were even glad to do it, but I was scared to death. Mr. Bamick recognized my fear, so be told me to do a report on a book that was about something that really interested me. So I did the first report on baseball.

When it came time for me to present it to the class, Mr. Bamick cut me some slack and let me read the report rather than give it from memory. Some of my classmates laughed at me, but Mr. Bamick defended (为……辩解) me. By the end of the year I had completed all four of the oral book reports. It wasn’t easy or comfortable for me, but I did it.

Years later I realized that Mr. Bamick did me a great favor in sixth grade. One of the chances I got when I won a tennis tournament (锦标赛) was to make comments to the fans who attended the match. Some of those were carried live on television and all of them were before thousands of people. It was still not one of my favorite things to do, but, with Mr. Bamick’s help, I got through it from time to time. Before long, I was asked to bring my favorite childhood teacher to a national event in Dallas. 1 was excited when Mr. Bamick joined me for the event. It meant a lot to me that he was there.

Mr. Bamick believed in me and helped me to believe in myself. It was he who helped me build the person I became.