2 . Lay eggs and make noises — that’s it? Anyone involved in chicken farming knows that the animals are capable of much more. Researchers have found evidence that roosters (公鸡) could recognize themselves in a mirror. Whether this is successful, however, depends on the experimental contexts.

Whether animals can recognize themselves and thus have self-awareness is one of the central questions in behavioral research. The mark test, a classic test for self-recognition came to the scientists. In the test, if an animal stands in front of a mirror and begins to explore the colored mark placed on its body, this is considered proof that it recognizes its reflection as itself.

“However, our goal was to conduct the mirror test in an environment that is better adapted to the ecologically relevant behavior of the roosters,” says Sonja, a researcher from the University of Bonn. She came up with the idea of using a natural behavior of roosters for the experiment.

Initially, the researchers set up a test area and placed a net to separate two compartments (隔间), through which the roosters could see each other. Then a picture of a fox was placed onto the ceiling of one compartment. Faced with the predator, the roosters let out 77 alarm calls in the presence of a partner, but only 17 when they were alone. The result shows that most roosters, faced with a fox, do alarm partners, which is the perfect illustration of the animals’ self-awareness. The next step was to place a mirror between the two compartments instead of the net. In all, only 25 alarm calls were let out. “The result indicates that the roosters don’t mistake their reflection for a partner, and possibly recognize themselves in their mirror image,” says Sonja.

For comparison, the team also performed the classic mark test. Here, the roosters didn’t recognize themselves in the mirror. The research team sees clear evidence that the classic mirror-mark test produces more reliable results when the behavior of the particular species is included in an ecologically relevant context. “In the classic situation, a rooster may not show self-recognition,” says Sonja. “But when a fox threatens him, it becomes clear that his reflection is not another rooster, but himself.” Further research on animals’ self-awareness is needed so as to better understand animal rights and animal welfare.

3 . Frozen in time, a 125-million-year-old mammal attacking a dinosaur. A 39-million-year-old whale, the heaviest animal that ever lived. The oldest known jellyfish, from 505 million years ago. Paleontology (古生物学) produces newsworthy discoveries.

Fossils (化石), moreover, provide direct evidence for the long history of life, allowing paleontologists to test hypotheses (假设) about evolution with data only they provide. They allow investigation of present and past life on Earth. Flows of biological diversity, appearances of new life forms and the extinctions of long existing ones, would go undiscovered without these efforts. But the headlines over exciting new fossils greatly underestimate the true importance of paleontology. Its real significance lies in how such discoveries brighten the grand history of life on Earth. From its beginnings, more than three billion years ago, to the present day, fossils record how life adapted or disappeared in the face of major environmental challenges.

Paleontologists provide us with a unique vantage on modern climate change. They play an essential role in interpreting ancient environments, in reconstructing ancient oceans, continents and climates. Fossils provide key limitation on the climate models that are essential for predicting future climate change. And the fossil record gives important insights into how life will respond to predicted future climate conditions, because these have occurred before in Earth’s history.

In addition, paleontology has provided a fundamental contribution to human thought: the reality of species extinction and thus of a world that has dramatically changed over time. In documenting the history of life, paleontologists recognized that many extinction episodes could occur suddenly, such as the event 66 million years ago that ended the dinosaurs. The search for the causes of past mass extinctions started pioneering studies from across the scientific spectrum (科学界), focusing on potential future threats to humanity.

Not only do paleontologists know what happens to life when things go bad, they also know how long it takes for ecosystems and biodiversity to recover from these disasters, which can take far longer than modern humans have existed.

Paleontologists thus provide a unique perspective on the nature and future long-term ecological impact of the current human-produced biodiversity crisis, the so-called Sixth Extinction, and therefore the importance of protecting modern biodiversity. The very concept of a Sixth Extinction would not exist without paleontologists documenting the first five.

Paleontologists know that understanding life’s past is critical to anticipating and adapting to life’s and humanity’s future. Paleontology is important because it brings its unique and critical perspective to current challenges in climate change, biodiversity loss and the environment. Paleontologists can predict the future because they know the past.

4 . After Alexander Pushkin was shot in a duel (决斗) in 1837, crowds of mourners formed in Saint Petersburg. When the wagon carrying the much loved poet’s body reached Pskov province, where he was to be buried, admirers tried to pull the vehicle themselves.

Today’s celebrity funerals tend to involve the public largely digitally rather than in person. But people are passionate all the same. In the past few months, grief has coursed around the Internet for Milan Kundera, and most recently, Michael Gambon. If you stop to think about it, such expressions of strong feelings for writers and actors are odd, even irrational.

Unlike other kinds of grief, this one is not rooted in personal intimacy (亲密关系). If you ever interacted with a cherished author, it was probably during a book tour when she signed your copy of her novel. Maybe you once locked eyes with a musician during a live concert and he smiled at you, but actually he did not even know you.

Objectively, sorrow makes sense when a star dies young or violently. Had she not died at 27, who knows what music Amy Winehouse would have added to her already impressive collections of work? The death of a long-lived and fulfilled artist, however, is far from the saddest item in an average day’s headlines. And while most ordinary people sink into oblivion, these celebrities live on in their output. Why, then, are these losses felt so widely and keenly?

One interpretation is that departed celebrities are merely the messengers. Part of your past —the years in which the musician was the soundtrack, the writer your ally (盟友) — can seem to fade away with them. The grief can be seen as a form of gratitude for the harmony and joy they supplied.

More importantly, the passing of an artist is an occasion for exchanges of ideas. In an atomized age, in which the default (默认) tone is critical, a beloved figure’s death is a chance to share positive feelings and memories with fellow admirers. These sad occasions are the parting gifts of these artists.

5 . The year 2023 marks the 102th anniversary of Noether’s ring theory, a branch of theoretical mathematics that is still fascinating and challenging numerous mathematicians today.

Neother was born in 1882 in Germany, whose father was a math professor, but it must have seemed unlikely to a young Neother that she would follow in his footsteps because women were banned from academia and few took classes at universities. After Neother graduated from a high school for girls, Erlangen University started to let women enroll. She signed up and earned her doctorate in mathematics, which should have been the end of her mathematical journey. Teaching at a university for women was still out of the question. But Neother stuck with mathematics anyway, staying in Erlangen and unofficially guiding doctoral students without pay.

In 1915, she applied for a position at the University of Gottingen. Bill Nicholl, the dean at the university, also a mathematician, was in favor of hiring Neother, although his argument was far from feminist (女权主义). “The female brain is unsuitable for mathematical production,” he wrote, “but Neother stood out as one of the rare exceptions.”

Unfortunately for Neother,the Ministry of Education would not give the university permission to have a woman as their teacher. Neother stayed in Gottingen and taught courses listed under the name of a male faculty teacher. During those years, she kept doing research and made important contributions to theoretical physics and Einstein’s theory of relativity. The university finally granted her lecturer status. Two years later, Neother published revolutionary discoveries in ring theory, which is the study of mathematical objects called rings. Neotherian rings show up all the time in modern mathematics. Mathematicians still use Neother’s map today,not just in ring theory,but in other area such as number theory and algebraic geometry.

7 . I spoke to my parents last night and for a moment I forgot I wasn’t really speaking to them, but to their digital replicas (复制品). They live inside an app as voice assistants constructed by the company HereAfter AI.

In fact, my parents are still alive and well; their virtual versions were made to help me understand the technology. Grief tech, which lets you “talk” with the people you’ve loved and lost, has been appearing in science fiction. But now it’s becoming a reality. Although the thought of it makes some frightened, it’s not hard to see the appeal that people might turn to digital replicas for comfort.

However, there is one major limitation. These replicas may sound like someone you love, but they know nothing about you. Anyone can talk to them, and get the same reply in the same tone. “The biggest issue with the technology is the idea that you can generate a single universal person,” says Justin Harrison, founder of a technological service.

Creating a virtual avatar you can have more conversation with contributes to your feeling connected to someone you loved and lost, says Erin Thompson, a clinical psychologist. But a grieving person needs to know that these bots can only capture a small part of someone rather than replace healthy, functional human relationships.

And there are other risks. Any service that allows you to create a digital replica of someone without that person’s participation raises complex moral issues. While some might argue that permission is less important with someone who is dead, can’t you also argue that the person who generated the other side of the conversation should have a say too? And what if that person is not, in fact, dead?

If digital replicas become mainstream, there will inevitably need to be new regulations around what we leave behind online. And we’ll be better off if we cope with the possibility of these replicas’ misuse before, not after, they reach mass adoption.

Anyway, I feel lucky to still have the precious opportunity to spend more time with my parents, face to face, no technology involved.

8 . In our human-centric view, the ability to shoot ink or change colors may seem odd, but you know what’s really odd? Menopause (更年期). You can count species other than humans known to experience and outlive menopause on one hand. Only Oracs (虎鲸) and some whale populations have females that live long past their reproductive years to become grandmothers. But a new, landmark study confirms that at least one population of chimpanzees can now be added to the list.

The discovery comes as the result of 21 years’ worth of observing the Ngogo community of wild chimpanzees in Kibale National Park, Uganda. Studying urine from 66 Ngogo females, aged 14 to 67, showed that their hormone levels changed after approaching 50, confirming they were in menopause. Interestingly, 50 is also the age when many people begin to experience menopause. “It’s really cool to finally have that piece of the puzzle come into place,” says Catherine Hobaiter, a primatologist who was not part of the new study.

But Catherine points out that the Ngogo community lives in a chimp paradise: the resource-rich, well-protected Kibale National Park that also lacks leopards, their main predator. And because the Noggo community is found in the heart of the park, its only neighbors are other chimps — not humans who can expose chimpanzees to viruses that have devastated other communities. “The Ngogo population may be an outlier (局外人) when it comes to the rest of the species,” she cautions.

And there is a question concerning “the grandmother effect”, according to which a grandmother has a decidedly beneficial effect on her children and grandchildren. Chimpanzees do not form long-term pair-bonds and females leave in search of new communities when they reach maturity, which means grandmother chimpanzees likely don’t know who their grandchildren are in the same way humans or even orcas do. What they do after the menopause remains a question of interest. “And that’s all future work to be done.” said Catherine.

9 . The Global Food Donation Policy Atlas has issued a recent report in order to recommend ways to increase food donations, reduce food waste, and fight hunger, which may help Kenyan leaders meet 2030 food waste reduction goals.

Food donation can reroute eatable food—that would otherwise give off greenhouse gasses in a landfill—to those experiencing hunger. According to the Famine Early Warning Systems Network, 3.5 million Kenyans, roughly 37 percent of the population, face severe hunger. At the same time, the Policy Atlas reports roughly 40 percent of food produced within Kenya goes to waste. But Broad Leib, Deputy Director of Harvard Law School Food Law and Policy Clinic (FLPC), sees some promising changes. “While progress is not happening as quickly as needed, Kenya’s food loss index has been steadily reduced from 1,744 metric tons in 2017, to 1,531 in 2018, to 1,446 metric tons in 2019, indicating a steady improvement and national commitment to food loss reduction,” reports Broad Leib.

According to the Policy Atlas, motivating food donation with rewards is particularly important, which helps food donors and food recovery organizations make up for costs necessary for recovery, storing, processing, and transporting food for donation.

“A major driver of food waste is inconsistent or unclear date labels that cause confusion among all actors along the value chain and limit the ability of businesses to donate food. This increases the likelihood that much safe food will go to waste,” Broad Leib tells Food Tank. However, he acknowledges Kenya’s current dual (双的) date labeling laws. While food may lose its freshness over time, it is still eatable before expiration (到期). Dual date labeling on packaged foods reduces bewilderment by defining dates for both safety and quality. This helps reduce considerable waste and responsibility for donors.

Broad Leib believes that the private sector can also play a significant role in decreasing food waste in Kenya. It is vital for consumer education campaigns. FLPC’s research shows that public-private initiatives can help raise awareness among consumers and donors around issues of food waste and food donation.

10 . Map reading, growing fruit and vegetable and basic car service are also more common skills among the baby boomer generation. But according to a new survey, just one in three 18- to 25-year-olds are able to do basic DIY, compared to two-thirds of those aged 58 and over.

Sarah Clarke-Kuehn, Chief Operating Officer-Commercial, said, “The survey findings are so interesting as they highlight a very common incorrect conception related to ‘getting old’.”

When asked at what age they thought developing new skills becomes “difficult”, Gen Z respondents said they were 35 years old, while those aged over 58 believed this number was 63 years old. The belief is that there is a boundary between learning new skills and getting a sense of achievement. But we know that this is just not the case. The benefits in continuing to enjoy life, as well as developing new talents are very significant—both physically and mentally as we grow older.

Neuroscientist and author, Dr Julia Jones, said, “We underestimate our brain’s ability to continue learning. Our brain is the most complex and precise structure in the known universe but we only use a small part of its true potential throughout our lifetimes. To boost continued brain health, we should learn complex and novel skills at all ages. This becomes more important as we age, because these learning experiences help to build new connections between neurons (神经细胞) that maintain intelligence and reduce the risk of future brain decline.”

“Learning languages and musical instruments are believed to be effective at boosting neuroplasticity (神经可塑性) due to their complex nature, but all learning is beneficial and can bring a sense of achievement, purpose and social engagement.”

Dr Jones added. “Find a new hobby and throw yourself into a wonderful learning experience or pick up an old pastime and improve those skills. I’m currently learning to play the guitar and it’s opened up a whole new world of music and fun.”