In the story of “The crow and the Pitcher” from Aesop's Fables, a thisty crow (乌鸦)drops stones into a narrow jar to raise the low level of water inside so he can take a drink.

    Now scientists have evidence to back up that story. Crows actually do understand how to make water displacement (移位) work to their advantage, experiments show. The results suggest that the birds are, at least in some aspects, as smart as first-graders.

    Researchers, led by Sarah Jelbert at the University of Auckland in New Zealand, presented six crows with tubes filled with water. Inside the tubes, a worm or piece of meat on a piece of wood was floating, just out of reach of the crow. In front of the tubes, the researchers arranged several rubber erasers that would sink, and some plastic objects that would float. The crows found out that they could drop the erasers into the tubes in order to raise the water level and get their snack.

    However, the birds handled awkwardly in experiments in which they could choose to drop objects in either a wide tube or a narrow one to get a snack, the researchers said. Dropping objects into narrow tube would lift the water level by a greater amount and put the treat within reach after just two drops; while it took around seven drops to raise the snack to the same level in the wide tube. The crows obviously didn't realize this, and most of them went for the wide tube first.

    Previous studies showed that chimps and human children can solve similar tasks. In a 2011 study, chimps and kids found out that they could put water into a tube to reach a peanut that was floating in a small amount of water at the bottom.

    The vast majority of green sea turtles in the northern Great Barrier Reef are female because of warmer temperatures due to climate change, which influences their sex, researchers said. Scientists are concerned populations of these animals could turn almost completely female.

    A recent study by the National Oceanic and Atmospheric Administration, California State University and Worldwide Fund for Nature Australia examined two genetically distinct populations of green sea turtles living in the Great Barrier Reef. The study found that a group of about 200,000 turtles living in the northern part of the reef was almost entirely female. While the southern population was 65 to 69 percent female, females in the northern group accounted for 99.1 percent of young turtles and 86.8 percent of adults.

    After combining their results with temperature data, the scientists found that most sea turtle populations are living above the most suitable temperature. The northern green turtles have been producing mainly females for more than two decades and that the complete feminization of this population is possible in the near future, making it clear that climate change is threatening the survival of these populations.

    Dermot O'Gorman, the chief executive of World Wildlife Fund Australia, said, “That's a very visible sign of the impact of climate change. But this is a quiet change.”

    O'Gorman said more urgent action on climate change is clearly needed, adding that some conservationists have already taken practical measures, such as using shade cloth on turtle nesting beaches to lower the sand temperature, and reducing by catch in the fishing industry.

    “Shade cloth can be used in certain places, but there's a limit to the scale you can do that,” he said, “Now every large male who can reproduce is going to be even more important.”

    Learning how to face silence in conversation is an important skill, especially when working across cultures.

    In international negotiations, experienced negotiator (谈判者) stay silent and impassive on purpose because that will make others feel uncomfortable and possibly make compromises without having to do anything. Americans especially can't stand silence, so they often are the first to break the silence and sometimes might be at a disadvantage in negotiations.

    So, what's the best response? Set your jaw and wait it out. Don't offer a compromise just because they are not speaking. If you have to say something, ask a direct question, such as "What's your initial reaction to that offer?" Once a silence is getting into 45 seconds you could say, "Let's come back to that in a minute and go on with the next part of our negotiation."

    In presentations, silence can be far more effective than dramatic passion (热情). Before starting, look at the audience and be silent for a moment because that says, "I'm in control. I know what I'm doing. I'm confident."

    A classic example was when Apple co-founder Steve Jobs launched the first iPhone. He introduced with many pauses so that you didn't miss his key points. Because silence makes us nervous, our natural reaction is that we'd better pay attention, there's something going on here.

    Equally, when giving a speech to staff or trainees, pauses count-especially if there are negatives. If you keep talking you're spoon feeding. Give people a moment of silence to get beyond the emotional response and to start thinking consciously and processing.

    Silence can be an inward-focused thoughtful activity or an outward stillness where you give yourself the time to watch and think and listen to the world around you. Having observed the use of silence in Finland and also among the Blackfeet Nation, a North American Indian tribe in northern Montana in the US, we can see benefits far beyond wheeling and dealing.

    Silence can be a very powerful point for understanding ourselves, understanding others, for developing better common understanding and more productive outcomes and that applies to business, politics, education, law, medicine, every area of human life.

    It's undeniable that spending time outdoors and in nature lifts our spirits and makes us feel more centered and at peace. When we breathe in fresh air, and enjoy the beauty of trees, streams and oceans, we naturally tend to feel more connected to ourselves and others.

Over the past decade, scientists have been exploring why nature — and dirt specifically — is such a powerful tool in improving our mood. According to researchers, the secret may lie in the microbes (微生物)of the soil. One bacterium specifically—-Mycobacterium Vaccae (M. Vaccae) —has been identified as having the power to affect our moods and cognitive function as well.

    Experiments conducted at Sage Colleges in New York found that contact with M. Vaccae can increase serotonin levels in the brain — a chemical that is associated with higher levels of happiness, increased focus, and reduced anxiety. In order to explore how the bacteria can improve learning, researchers Dory Mathews and Susan Jenks experimented with mice in a maze. Mice that ingested the bacteria navigated the maze twice as fast as the control group and proved less anxious as well.

    Humans can absorb M. Vaccae just by playing in the dirt. We take in it when we breathe, we consume it in organic vegetables, and it can also enter our bloodstream through skin contact, especially where we have open cuts. This may explain why children in school perform better after break.

    Neuroscientist Christopher Lowry at the University of Bristol in England believes that he has identified why this incredible bacterium works. "What we think happens is that the bacteria activate immune cells, which release chemicals called cytokines that then act on receptors on the sensory nerves to increase their activity.”

    Beyond the power of M. Vaceae, scientists have been proving for decades that exposure to dirt, and the huge number of microbes found in dirt, can strengthen our immune system. When our body comes into contact with bacteria, it stores die information in a type of library and can then use that information to fight sickness and infection more effectively.

    Happiness, focus, less anxiety… I'll take a double dose of dirt; please!

Long ago, poets in Japan listened, watched, and caught the beauty of the earth's songs like the raindrops. They did this with the tiniest poems in the world, called haiku. A haiku is a poem that is just three lines and seventeen syllables long. And the poets who wrote them watched and listened, not only with their eyes and ears, but also with their hearts!

In their haiku, the early Japanese poets caught the colours, sounds, and beauties of the seasons of the year. They sang of their islands' beauties. Their miniature poems were not meant to fully describe a scene or to explain it but rather were a flash impression. 

Interestingly enough, Japanese poetry has had a long and colourful history. In the prehaiku period in the early eighth century, Japanese poets wrote katauta, poems in a question-and-answer form, using two people. Each three-line verse contained about seventeen syllables that could be delivered easily in one breath—just as one would naturally ask or answer a question. This has remained the basic pattern for traditional Japanese poetry throughout the centuries. 

Another form that appeared was the tanka, which contained five lines and thirty-one syllables(5, 7, 5, 7, 7), written by either one or two persons. From that evolved(逐步形成) the renga, which contained more than one verse, or link. Written by three or more people, it could have as many as 100 links! The first verse of the renga introduced a subject. It had three lines and was called hokku, or starting verse. Renga parties became a great pleasure. 

Around 1450, haikai no renga became popular. This style of linked verse contained puns (双关) and was humorous and amusing. The opening three lines were still called a hokku, and from haikai and hokku the term haiku evolved. 

Teachers across America are struggling to decide whether to view artificial intelligence (AI) tools like ChatGPT as friends or enemies in the classroom. Our study on whether AI affects student creativity shows that the answer isn't always simple. 

In the study, we asked college students to brainstorm — without technology — all the ways a paper clip can be used. A month later, we asked them to do the same, but using ChatGPT. We found that AI can be a useful brainstorming tool, quickly generating ideas that can spark creative exploration. But there are also potential negative effects on students' creative thinking skills and self-confidence. While students reported that it was helpful to "have another brain", they also felt that using AI was "the easy way out" and didn't allow them to think on their own. 

The results call for a thoughtful approach to using AI in classrooms and striking a balance that inspires students' creativity while utilizing AI's capabilities. The good news is that the students in our study generated more diverse and detailed ideas when using AI. They found that AI was useful for kick-starting brainstorming sessions. 

When it comes to brainstorming with AI, some students voiced concerns about over-reliance on the technology, fearing it might hurt their own thoughts and, consequently, confidence in their creative abilities. Some students reported a "fixation of the mind", meaning that once they saw the AI's ideas, they had a hard time coming up with their own. Some students also questioned the originality of ideas generated by AI. Our research noted that while using ChatGPT improved students' creative output individually, the AI's ideas tended to be repetitive overall. 

The study results indicate that allowing students to practice creativity independently first will strengthen their belief in themselves and their abilities. Once they complete this, AI can be useful in furthering their learning, much like teaching long division to students before introducing a calculator. That's to say, teaching students to be creative thinkers rather than rely on AI for answers is the key to answering the question mentioned above.