【推荐2】Researchers have recorded penguins making sounds underwater for the first time — the first time such behavior has been identified in seabirds. These animals, like other seabirds, are highly vocal on land. They are known to communicate when their heads are above the water in the ocean, possibly for the purposes of group formation.

However, until the latest study — published in the journal Zoological Science — it was not known whether penguins made sounds underwater, like some other air-breathing marine predators, such as whales and dolphins. For their research, a team of scientists led by Andréa from Nelson Mandela University in South Africa, wanted to investigate this issue. To do so, they fitted adult penguins from three species with video cameras featuring built-in microphones.

To the surprise of Andréa and her colleagues, the team recorded a total of 203 underwater vocalizations from the penguins in the underwater footage they captured over a month-long period in 2019. These are the first recordings of seabirds producing vocalizations underwater. “I couldn’t believe it. I had to replay it many times,” Andréa said.

The vocalizations that the team recorded — which sound like rapid whoops — were very short in duration, lasting about 0.06 seconds on average. And all of these sounds were emitted（发出）during dives in which the animals were searching for food. Currently, it is not clear why the penguins are making these sounds; however, they only produce them while hunting. In fact, more than 50 percent of the vocalizations were immediately preceded by an acceleration movement or followed by an attempt to hunt.

According to the researchers, this suggests that the sounds are related to hunting behavior — especially because the penguins tend to be alone when they make them, indicating that communication was not the purpose. The researchers guess that the penguins may be using the vocalizations to stun(使昏迷) their prey. However, much more research is required to determine why the penguins make these sounds, the scientists note.

【推荐1】The science of physics today is as current as the morning newspaper. Indeed, as a result of new advances in physics and their rapid application to inventions designed to satisfy man's wants,the world itself has been changing rapidly. Space technology, industrial technology, and the technology of the home, the farm, the office, the bank, and the department store have all been revolutionized.

Clearly, every grown-up today would understand the world he lives in much better if he knew something about physics. Whether it be Congress(美国国会)voting huge sums of money for warships, space exploration, or atomic energy; the office staff learning to use a new computers; Son Bobby wanting to know about going to the moon; or the housewife learning to operate a electric stove, physics seems to be everywhere.

Teachers in thousands of schoolrooms in America are trying to communicate some of the excitement and importance of these new developments to their students. They know that some of their eager student will someday be scientists and will themselves   then contribute to the development of new knowledge or its application to new things.

But in any case, they can be sure that if they bring a knowledge of science (any science) to their students in meaningful and stimulating ways, they have contributed much to helping each one live a more meaningful life.

【推荐2】The information age has reached a critical point, with AI’s superior computation ability surpassing that of humans. A report released by Goldman Sachs in March 2023 estimated that AI is capable of doing a quarter of all the work currently done by humans.     1     It would not just happen to individuals, but it could be pretty systematic. Across the European Union and US, the report further notes, 300 million jobs are expected to be lost to automation.

    2     According to Martin Ford, author of Rule of the Robots: How Artificial Intelligence Will Transform Everything, three categories are going to be relatively secure in the foreseeable future.     3     That means you’re not doing formulaic (程式化的) work or just rearranging things, but generating new ideas. For example, in the field of science, where your job is coming up with a novel strategy or solution, there’s going to be a place for human beings.

The second category is jobs that require sophisticated interpersonal relationships like nurses, business consultants and investigative journalists. These are jobs where you need a very deep understanding of people.     4    

The third safe zone includes jobs that really require lots of mobility and problem-solving ability in unpredictable environments. Electricians, plumbers, welders (焊工) and the like all fall under this umbrella, where you’re dealing with different situations all the time.

In short, seeking roles in dynamic, shifting environments that include unpredictable tasks is good way to avoid job loss to AI, at least, for a while. It’s important to note that an advanced education is not a defense against AI takeover. In many cases, more educated workers are going to be more threatened than even the least educated workers.     5     It’s really hard to automate that job.

【推荐3】In a study published in the U. S. journal Science, researchers from the Chinese Academy of Agricultural Sciences(CAAS) and the University of Florida identified the chemical combinations and genetic recipe for better tomato flavor(味道).

“In recent years, consumers often complain that the modern tomato is less flavorful than it once was” said co-principal researcher Sanwen Huang. “Our results provide a practical road map for breeding tomato varieties with better flavor.”

For the study, a 170-person consumer group was created to evaluate 160 tomatoes representing 101 varieties, based on qualities such as “overall liking” and “flavor degree”. The results pointed to dozens of chemical compounds of interest, and further research using a statistical model discovered 33 flavor compounds connected with consumer liking, such as glucose(葡萄糖). The reason why modern tomatoes don’t taste good anymore is that a total of 13 of these flavor-associated compounds “were significantly reduced in modern varieties,” their paper wrote. Moreover, the researchers found that smaller fruit tended to have greater sugar content, suggesting that “selection for more sizable tomatoes has cost sweetness and flavor”.

Based on this knowledge, Huang and Professor Harry Klee of the University of Florida studied the whole genomes of 398 varieties of tomato, identifying about 250 positions of genes on a chromosome(染色体), which controlled tomato flavor.

“We’re just fixing what has been damaged over the last half century to push them back to where they were a century ago,” said Klee in a statement. “We can make the supermarket tomato taste noticeably better.” Klee said new tomato varieties with better flavor could be ready in three to four years. In addition, “the genes and pathways identified here in the tomato almost certainly point to pathways worth researching for improvement of flavor quality in other fruit crops,” they wrote.

【推荐1】Even when communing with nature we depend on technology for help-but then, so did Thoreau at Walden Pond.

Walking in the same woods yesterday, I let myself wander at random, communing with nature.

I took in beautiful scenery near and far thanks to my progressive-lens eyeglasses. Occasionally I’d pull out my smartphone to take pictures on anything interesting. I recorded an inner monologue (独白) with a background of all sounds of the forest. At times, I consulted my smart watch to check on my heartbeat, mileage and calorie burn. Eventually I realized I was quite lost. Not a problem of course. Online maps came to my rescue.

But something bothered me. In what I’d intended as a nature experience, here I was using very high technology to help myself out. This insight set off a reconsideration of everything that happened during my “nature walk”, which had been technologically enhanced every step of the way. I’d been functioning as a man-machine combination: a cyborg.

What would the true naturalist Thoreau think of that? My first thought was that he’d be shocked. But later I did some research. Thoreau enjoyed what his spyglass discovered, like this eagle from his journal:

Lying on the ground with my glass, I could watch him very easily…till I almost lost him in the clouds… I think I have got the worth of my glass now that it has revealed to me the white- headed eagle.

Famously, Thoreau always set out equipped with a walking stick, which he used not only for support but also to take measurements of water and snow levels. His hat was also a tool, which he called his “botany-box”. And he was prepared even with needles and thread, so when coming out of the woods, he was “the best dressed”. Clearly, Thoreau was a bit of a cyborg himself.

Thinking more deeply, I realized we’ve come a long way from our hunter-gatherer ancestors, who walked from necessity and relied on nature’s gift. Cyborgs are us.

A．	B．
C．	D．

【推荐2】Zhong Zhong and Hua Hua have made medical history as the first cloned primates (灵长目动物),with the efforts of a team of Chinese scientists.

According to the journal Cell , it is a milestone for biomedical research. It could potentially lead to the development of new treatments for human disease. But it also makes ethicists (伦理学者) about where this all might lead. Do Zhong Zhong and Hua Hua suggest the coming of human cloning?

Born in 1996, Dolly the sheep was the first cloned mammal, and was followed by many more, including dogs, rabbits and pigs. But researchers were unable to clone primates because the genes involved didn’t react well to the procedure. Over the years, a handful of research institutions have tried and failed to birth a live monkey clone.

The successful team, at Shanghai’s Chinese Academy of Sciences, used the same basic method that created Dolly but had failed in subsequent(随后的) primate cloning attempts. It’s called somatic（躯体）cell nuclear transfer and involves transferring DNA from adult cells into eggs that have had their own DNA removed. Without the addition of sperm(精子), the eggs are stimulated （刺激）chemically to develop into an embryo that’s a clone of the DNA donor(提供者). The embryo is then placed into a substitue(替代) for gestation（妊娠）.

The researchers modified the approach in two important ways, however. Rather than use adult cells in the DNA transfer, they used fetal (胎儿)cells, which react better to chemical stimuli（刺激）for embryo development, says Mu-ming Poo, director of the academy’s Institute of Neuroscience and a co-autho of the paper. They also fine-tuned the cell transfer process to minimize damage to the eggs

As for creating human clones, Poo says the research shows it can be done, but he and his team have no interest. “Besides many technical dificulties that remain to be overcome, we see no justifiable reason to do human cloning,” says Poo, “nor would the societies around the world permit such an attempt.”

While human cells may be cloned experimentally, for example to research tissue regeneration, the cloning of an entire human is illegal in more than 70 countries, according to the Center for Genetics and Society. U.S. law does not ban it, but over a dozen states do. (Discover 2019J&F,P60.)