I opened the door and was welcomed as usual by Shredder. He ran towards me, jumped up and put a paw on my shoulder. “Okay, boy,” I said, rubbing his ears the way he liked. He moved his tail happily. I usually played with him all day. But with so many things on my schedule these days—meetings, dinners, many houses to clean—I didn’t have time. I told Shredder to lie down.” I have to get to work now,” I said. I headed downstairs to clean the bedroom. All of a sudden, pain shot through my head. It was unlike anything I’d ever felt—10 times worse. Things dropped out of my hands, and I fell to the ground. I knew someone who had died from a brain aneurysm (脑部动脉瘤).

I had to get help before it was too late. I should call 911, but the nearest phone was in the kitchen. I tried to stand up, but couldn’t. I knew I had to get upstairs. It felt like my head was going to explode. I managed to move to the kitchen. But later I couldn’t move anymore. I was helpless. Through the sharp pain, I looked up. Shredder stared back at me from the top step. Did he think I was playing?” Come here,” I whispered, trying to make my voice sound playful. He stared with doubt.” Come on. boy,” I said. Shredder ran down the steps and stood next to me. His tail stopped moving. “Help me, Shredder,” I said, holding his collar (颈圈) with my left hand. He climbed a step and then stopped. “Up!” I said. He looked back at me as if to say, “Is this right?” “Go,” I whispered. He started to drag me. My left arm went frozen. I had to look at Shredder’s collar to make sure I kept my hold.

【推荐1】Can a small group of drones (无人机) guarantee the safety and reliability of railways and, at the same time, help railway operators save billions of euros each year? That is the very likely future of applying today’s “eyes in the sky” technology to making sure that the millions of kilometres of rail tracks and infrastructure (基础设施) worldwide are safe for trains on a 24/7 basis.

Drones are already being used to examine high-tension electrical lines. They could do precisely the same thing to inspect railway lines and other vital aspects of rail infrastructure such as the correct position of railway tracks and switching points. The more regularly they can be inspected, the more railway safety, reliability and on-time performance will be improved. Costs would be cut and operations would be more efficient (高效) across the board.

That includes huge savings in maintenance costs and better protection of railway personnel safety. It is calculated that European railways alone spend approximately 20 billion euros a year on maintenance, including sending maintenance staff, often at night, to inspect and repair the rail infrastructure. That can be dangerous work that could be avoided with drones assisting the crews’ efforts.

By using the latest technologies, drones could also start providing higher-value services for railways, detecting faults in the rail or switches, before they can cause any safety problems. To perform these tasks, drones for rail don’t need to be flying overhead. Engineers are now working on a new concept: the rail drones of the future. They will be moving on the track ahead of the train, and programmed to run autonomously. Very small drones with advanced sensors and AI and travelling ahead of the train could guide it like a co-pilot. With their ability to see ahead, they could signal any problem, so that fast-moving trains would be able to react in time.

【推荐2】Many people would answer the question of what makes us human by insisting that we are cultural beings. There is no doubt that we are. But one definition of culture is the totality of traditions acquired in a community by social learning from other individuals, and many animal species have traditions. Can we then say that some animals are cultural beings too?

One approach to study culture in animals is the so-called Method of Exclusion (排除), in which scientists investigate behavioral variations across populations of one species. In a famous study, scientists learned that chimpanzee (黑猩猩) behaviors were socially passed on as they were present at some sites but not at others, despite having same ecological settings. For example, chimpanzees in Tai National Park in Ivory Coast are well-known for their nut-cracking skills. Chimpanzees in Gombe national part in Tanzania, on the other hand, do not crack nuts, although nuts exist in their environment too.

However, when applying the Method of Exclusion, one has to be very careful. There are other factors that could also explain the pattern of behavioral evaluation. For example, some of the chimpanzee techniques scientists evaluated occur in only one of the three subspecies. So it’s quite possible that these behaviors also have an innate component. This would mean that one chimpanzee subspecies uses a new technique not out of cultural tradition, but because the behavior is fixed to specific genes. Another factor that has to be excluded is of course the environment Chimpanzees in Mahale do not fish algae (水藻), simply because algae does not exist there.

But when we exclude all the variations that can be explained by genes or environment, we still find that animals do show cultural variations. Does that mean there is no real difference between them and us after all? Not exactly: There is a fundamental difference between human and animal culture. Only humans can build culturally on what generations before us have learned. This is called “cumulative culture”. We don’t have to keep reinventing the wheel. This is called the “ratchet (棘轮) effect”. Like a ratchet that can be turned forward but not back, people’s cultural techniques evolve.

It is likely that behaviors we see today in chimpanzee cultures could be invented over and over again by individual animals themselves. In contrast, a child born today would not be able to invent a computer without the knowledge of many past generations.

【推荐1】For Western designers, China and its rich culture have long been an inspiration for Western creative.

“It’s no secret that China has always been a source (来源) of inspiration for designers,” says Amanda Hill, chief creative officer at A+E Networks, a global media company and home to some of the biggest fashion (时尚) shows.

Earlier this year, the China Through A Looking Glass exhibition in New York exhibited 140 pieces of China-inspired fashionable clothing alongside Chinese works of art, with the aim of exploring the influence of Chinese aesthetics (美学) on Western fashion and how China has fueled the fashionable imagination for centuries. The exhibition had record attendance, showing that there is huge interest in Chinese influences.

“China is impossible to overlook,” says Hill. “Chinese models are the faces of beauty and fashion campaigns that sell dreams to women all over the world, which means Chinese women are not just consumers of fashion — they are central to its movement.” Of course, not only are today’s top Western designers being influenced by China — some of the best designers of contemporary fashion are themselves Chinese. “Vera Wang, Alexander Wang, Jason Wu are taking on Galliano, Albaz, Marc Jacobs — and beating them hands down in design and sales,” adds Hill.

For Hill, it is impossible not to talk about China as the leading player when discussing fashion. “The most famous designers are Chinese, so are the models, and so are the consumers,” she says. “China is no longer just another market; in many senses it has become the market. If you talk about fashion today, you are talking about China — its influences, its direction, its breathtaking clothes, and how young designers and models are finally acknowledging that in many ways.”

【推荐2】Born with severe hearing loss, Li has found her way to communicate with the world—through painting.

Before learning to paint, Li always felt lonely in a silent world. She knew she was different from her peers because she could not hear. But a painting class in primary school opened for her a door to creativity and a way of expression.

“I still remember my first mural, which was to help a kindergarten to design and paint its wall,” Li says. “The project made me realize how happy I was immersing myself into painting.”

To pursue her passion for art, Li went to study advertising design at a vocational and technical school. “Painting brushes can help me create a colorful world in my imagination, telling my thoughts on paper, instead of through voices,” Li said.

Graduating from college in 2005, Li got a job as a typist at a public institute. But she could not communicate well with her other colleagues. Her husband understood how she felt because he lost his hearing due to medication when he was 1 year old. He is also an art lover. In March 2016, under her husband’s suggestion, Li quit her job and joined her husband’s company, which specializes in 3D wall and ground paintings.

Wall painting is a demanding job because it requires people to work outdoors, whether in extremely cold or hot weather. As all the people are hearing-impaired in their company, communication with clients is the most common challenge that the team faces.

Now in many parks and scenic spots, the couple have created large-scale murals and interactive pavement painting that make onlookers a part of the drawings.

“My husband and I want to introduce painting to more people like us and help them find their own way to make a living,” Li says. Now Li has an apprentice who just graduated from college. While coaching the newcomer, Li is exploring her own style and hopes to become an illustrator and open her own exhibition one day.

“They’re energetic young people with a passion to create new things, and you can feel that in their paintings,” one of their clients said. “They’re also a professional, dedicated team, often working late into the night on the designs for us.”

Li hopes that their stories can encourage more hearing-impaired people to build their own careers and achieve their goals, regardless of how tough it may be.

【推荐3】While many of us might long to just sleep through this entire winter, humans, unlike a lot of other mammals - don’t have the capacity to hibernate (冬眠). But researchers think they have found some tell-tale marks on the fossils, which suggests that early humans may have survived the harsh winter by hibernating.

Bears have specialized metabolic (新陈代谢的) processes to protect them from this extended sleep, but sometimes this process doesn’t quite go to plan. For example, hibernators can end up with a host of diseases after hibernation if they don’t get enough food reserves before they go down for the winter. The researchers believe this may have been the circumstance of some human ancestors whose remains with deep cracks in bones were discovered in a Spanish cave called Sima de los Huesos. This deep hole is home to an incredible number of fossils, with archaeologists having discovered thousands of early humans’ skeletal remains that are around 430,000 years old and probably the ancestors of the Sima people or others.

In a paper published in L’Anthropologie, two experts argue that the fossils found in Sima de los Huesos show seasonal variations that suggest that bone growth got interrupted for several months of each year. They suggest these early humans found themselves being in metabolic states that helped them to survive for long periods of time in extremely cold conditions with limited stores of body fat.

The researchers admit the idea “may sound like science fiction”, but they point out that many mammals including primates (灵长类动物)do this. “This suggests that the genetic basis and physiology for such slow metabolism could be preserved in many mammalian species including humans," state Arsuaga and Bartsiokas.

However, Chris Stringer of the Natural History Museum in London pointed out that large mammals such as bears do not actually hibernate, because their large bodies cannot lower their core temperature enough. Instead, they enter a less deep sleep known as torpor. In such a condition, the energy demands of the human-sized brains of the Sima people would have remained very large, creating an additional survival problem for them during torpor.