1 . If a pancake could dream, it might long for legs so it could jump off your breakfast plate in pursuit of a better, unchewed life. But legs aren’t necessary for something as flat as a pancake to jump around. A group of scientists have designed a pancake-shaped robot that can jump several times per second and higher than seven times its body height. The new robot named Hop, which swiftly jumps without feet, is an important contribution to the soft robotics.

Many ground robots move by rolling or walking. But it’s more efficient for robots to jump over obstacles (障碍物) than to go around them. Although jumping can offer some robots a competitive edge, engineering that ability has been a challenge for robotics researchers. Some soft robots that store energy can perform a single impressive jump very infrequently. Some lightweight soft robots that don’t store energy can jump frequently but can’t jump high or far enough to successfully cross an obstacle.

For inspiration, the researchers looked to gall midge larvae (瘿蚊幼虫) that miraculously throw themselves across distances 30 times as long as their loglike bodies. A gall midge larva bends its body and squeezes the liquid in its body to one end, making it rigid (僵硬的). The accumulation of liquid builds up pressure, and releasing the pressure sends it soaring (飙升). The robot’s body doesn’t resemble (像) that of a gall midge larva, but it jumps like one. Its body is made of two small plastic bags printed with electrodes; the front bag is filled with liquid and the back one is filled with the same volume of air. The robot uses electricity to drive the flow of liquid, which causes the body to bend and generate force with the ground, resulting in a jump. And the air bag imitates the function of an animal’s tail, helping the robot keep a stable position.

While the robot is currently restricted to Earth, it might be right at home exploring another planet. If this is true, the researchers robot might jump over dusty rocks and large holes on the moon or Mars, going where no pancake has gone before.

2 . Native to forests of Central and South America, glass frogs in the Centrolenidae family get their name from their skin and muscles that help them be perfectly fit to live in their jungle environment. Turn the frogs over, where the effect is the most impressive, and you’ll make out their hearts, livers, and other organs through their hyaline stomachs.

And in a study published in the journal Science, researchers have discovered an amazing mechanism (机制) the animals use to become so clear.

When glass frogs go to sleep, they take in 89 percent of their brightly colored red blood cells into sacs (液囊) in their livers, which reflect incoming light and make the frogs appear nearly unseen. With their red blood cells out of view, the frogs become twice to three times more clear -a trick scientists believe helps the animals avoid being killed and eaten by their natural enemies.

“The trick is really hard to do, because their tissues are full of things that take in and spread light. And transparency (透明) is normal for many creatures in water, but hard on land,” says study co-author Jesse Delia. “Red blood cells also take in a lot of light, and we found that the frogs can actually hide themselves by packing them into the liver.”

Not only are the findings interesting, but the researchers attach great importance to them. That’s because many red blood cells in one place usually form a clot (血块), which can block and lead to a potentially life-threatening condition. But the frogs can seemingly clot and expand their red blood cells at will — without any negative effects. This may mean the animals already have what medical researchers have been seeking for decades: a biological mechanism which prevents too much bleeding while also preventing too much clotting.

5 . About 12% of the total global energy demand comes from heating and cooling homes and businesses. A new study suggests that using underground water to maintain comfortable temperatures could reduce consumption of natural gas and electricity in this section by 40% in the US. The approach is called ATES, short for aquifer thermal energy storage(含水层热能储存).

“We need storage to absorb energy from the sun and wind. It’s crucial to creating affordable, reliable, and deeply environmental-friendly electricity systems. Most people are interested in batteries and other kinds of electrical storage. But we were wondering whether there was any opportunity to use geothermal (地热的) energy storage,” said first author A. T. D Perera. “With ATES, energy can be stored for a long period of time, without adding an additional burden to the grid (输电网).”

ATES is a pleasantly simple concept that takes advantage of the heat-absorbing property of water and the natural geological features of the planet. You simply pull existing underground water up and heat it at the surface in the summer with environmental heat or energy. Then you send it back down. It stays fairly hot because the Earth is a good insulator (绝热体).

“Unlike above-ground tank-based water or ice storage systems, ATES will not need space. It’s also more efficient and can support larger communities in cooling or heating than traditional geothermal heat pump systems that rely on heat moving with the underground soil,” added coauthor Hong Tianzhen.

A major benefit of ATES is that it will become more efficient as weather becomes more extreme in the coming years due to climate change. The hotter summers and severer winters could increase the amount of free thermal energy that can be stored with ATES. “It’s very much a realistic thing to do and this work is really about showing its value,” said Perera. “This technology is ready to go, so to speak. We just need to do it.”

6 . 2025 Illustration Competition

Enter the competition most respected and admired in the industry for creativity in illustration, the Communication Arts Illustration Competition. Selected by distinguished professionals, the winning entries will be distributed worldwide in the Communication Arts Illustration Annual and on commarts.com, ensuring important exposure of the creations. Each winner will receive a professionalized Award of Excellence, made from solid aluminum, and an award certificate. Communication Art’s Award of Excellence is one of the most desired awards. If chosen, winning places you in the highest ranks of your profession.

Any illustration first published or produced from Jan. 2024 to Jan. 2025 is qualified. Entries may originate from any country. Description sin English are necessary for the judges to read.

Digital Images: RGB images in JPG format with a maximum file size of 2 MB. GIF images maybe livelier but would be turned down, and so would the PNG ones.

Motion Entries: In MOV, MP4 or MPG format, with a maximum file size of 500 MB.

For more categories, please download the category PDF.

Entries must be registered no later than Jan.13, 2025. Entries registered after that date will be charged a fee of $10 each. No entries can be registered after Jan. 27, 2025.

7 . Social media allows teenagers to create online identities, communicate with others and build social networks. These networks can provide teenagers with valuable support. Teenagers also use social media for entertainment and self-expression. And the platforms can expose teenagers to current events, allow them to communicate across geographic barriers and touch them about different kinds of subjects. However, social media use can also, negatively affect teenagers, distracting them, influencing their sleep, and exposing them to bullying (恐吓), rumour (谣言) spreading, untrue views of other people’s lives and peer pressure.

There are steps you can take to encourage responsible use of social media and limit some of its negative effects.

Set reasonable limits. Talk to your teenager about how to avoid letting social media affect his or her activities, sleep, meals or homework. Encourage a bedtime routine that avoids electronic media use, and keep cellphones and iPads out of teenagers’ bedrooms. Set an example by following these rules yourself.

Monitor your teenager’s accounts. Let your teenager know that you’ll be regularly checking his or her social media accounts. You might aim to do so once a week or more. And make sure you follow through.

Explain what’s not OK. Discourage your teenager from gossiping, spreading rumour, bullying or damaging someone’s reputation — online or otherwise. Talk to your teenager about what is appropriate and safe to share on social media.

Encourage face-to-face contact with friends. This is particularly significant for teenagers who are easily hurt by social anxiety disorder.

Talk about social media. Talk about your own social media habits. Ask your teenager how he or she is using social media and how it makes him or her feel. Remind your teenager that social media is full of unrealistic images.

If you think your teenager is under the anxiety or depression related to social media use, talk to your child’s health care provider immediately.

8 . No matter where you go around the globe, everybody loves to celebrate. And when it comes to celebration, festivals offer something for everyone.     1    

Burning Man

Burning Man started in 1986. When Larry Harvey made an 8-foot tall wooden figure and lit it on fire, one of the world’s craziest parties was born.     2     On this day, people build up a “city in the desert” and bum it up with nothing left.

Rio Carnival

    3     It is widely considered “the greatest show on Earth”. The event attracts nearly 5 million people each year, with a half-million foreign visitors. It’s also celebrated in many other Latin American nations, but none is like Rio.

Harbin International Ice & Snow Festival

Located in Northeast China, Harbin receives some seriously cold winter winds. This kind of weather makes it home to the largest ice statues in the world.     4     Ice and Snow World opens at night, with colorful lights show. Other activities include skiing and swimming in the river.

Dia de Los Muertos

Known in English as the Day of the Dead, the holiday begins on October 31.     5     In some cities, children will dress up in costume and go door-to-door asking sweets, much like trick-or-treat in the US.

9 . Pu’er is the home of the world-known tea of the same name. Since other tea-growing centers in Pu’er may have a larger output, more famous brands and heritage surrounding the history of the Tea-horse Ancient Road, Jingmai, also in Pu’er, nay not be people’s first choice to look for the best Pu’er Tea.

However, being cut off from the outside by rivers, this mountainous area has become a perfect place for an ancient planting technique, growing too trees under forest, known as the “under-story” method, which filters (过滤) sunshine while ensuring water.

Nan Kang, former head of Mangjing village, said, “Compared to modern plantations, we’ll surely produce less tea in the ancient forest. But we have to respect our tradition and belief. Birds eat insects to protect the tea and the fallen leaves from trees provide fertilizer. Everything improves the other, but also limits each other. It is the way of nature.”

Nan is an old-time Blang leader’s grandson. Following an old leader named Pa Aileng, his ancestors came to settle near the Jingmai Mountain centuries ago. It is believed that Pa Aileng found that tea leaves made his people recover from diseases they suffered from during their moving to other places, so the hero is also considered as a “tea ancestor”. Blang people chose a mountain to remember him. They call it Peak Aileng.

“We Blang people believe tea has its own spirit,” Nan says, “The first planted tea tree in every field is called the Tea Spirit Tree. That means the field has an owner. And the symbol also makes everyone follow moral codes and protect the plants.”

Now, this mountain of tea, also a storehouse of the time-tested traditions of local ethnic groups, attracts global attention. The Cultural Landscape of Old Tea Forests of the Jingmai Mountain in Pu’er was named as a World Heritage Site, becoming China’s 57th entry on the list.

10 . An important lesson in the moral education of children could be as close as the book in their hands. Among all kinds of books, stories matter. They can play a role in building moral values in young audiences, according to the results of a new study.

Lindsay Hahn is the first author of the new study, which mainly explores how media content influences children. Many studies done before have focused on broad conceptualizations (概念化), like positive or negative effects of specific content, but Hahn’s study looks at how reading of content featuring specific moral values might influence the kids’ values. Do children reading particular moral, characteristics take in those qualities and build their own morality? The findings suggest so.

“Parents, caregivers, and teachers are often wondering how media can be used for good,” says Hahn. “How can it be used for good things? How can it discourage bad habits? How can it educate?” Answering those questions begins with a better understanding of how to use media. “When parents are considering what media they might want to select for their children, they can further deliberate what particular moral value is being stressed by the main character, and how the main character is treated because of those actions,” she says.

For the study, Hahn and her workmates took the main character from a young adult novel. They wrote the content to reflect the study’s focus on moral values. Those stories were shared with about 200 participants between the ages of 10 and 14. This is a favorable range for media research because it’s more difficult to introduce the understanding of stories to younger kids, while challenging to hold the attention of older teenagers, who become bored with basic storylines, according to Hahn.