Despite not being documented by researchers since 1968, the sengi(象鼩), a tiny big-eyed mouse with a long tail and a trunk-like nose that’s native to Somalia, was rediscovered living in well-preserved habitat in neighboring Djibouti this year, and in quite healthy numbers.
An exploration beginning in 2019 looked to use local knowledge about the sengi from the people of Djibouti who said it was still there. Sure enough, it took only one trap filled with coconut, peanut butter and yeast to find the little guy.
“It was surprising,” said Steven Heritage, a research scientist at Duke University in the US. “When we opened the first trap and saw the little tuft of hair on the tip of its tail, we just looked at one another and couldn’t believe it. A number of small mammal(哺乳动物)surveys since the 1970s did not find the Somali sengi in Djibouti — it was indeed a serendipitous discovery.”
One of the least understood members of the 20 species-strong elephant shrew genus(象鼩属), the sengi lives in habitats that are unsuitable for most human activities, allowing it to remain relatively undisturbed and safe.
“Usually when we rediscover lost species, we find just one or two individuals and have to act quickly to try to prevent their extinction,” said Robin Moore, of the Global Wildlife Conservation (GWC) group.
The team set 1,000 traps and caught 12 of the little shrews while making the first video and photographic documentation of the animal for science. Along with rediscovering the species, the team gathered DNA samples(样本)which later showed the Somali sengi to be more closely related to sengis in other corners of Africa like Morocco and South Africa.
This finding has suggested that the Somali sengi needs to be placed in a new genus — moving from Elephantulus to Galegeeska.
Like all great discoveries in science, the questions answered are only equal to the new mysteries presented, but the researchers’ work has highlighted Djibouti as a biodiverse(具有生物多样性的)nation worthy of scientific study. With any luck, perhaps more discoveries are waiting to be made among its desert and salt lakes.
1. What made the finding of the Somali sengi special?A.It was rediscovered by Somalis. |
B.It looked surprisingly different. |
C.It reappeared in Africa after more than 50 years. |
D.It had become smart enough to avoid being trapped. |
A.Unrealistic. | B.Professional. | C.Accidental. | D.Individual. |
A.How the Somali sengi manages to survive. |
B.Why the Somali sengi can live peacefully. |
C.How human activities affect the Somali sengi. |
D.What environment the Somali sengi should live in. |
A.By doing DNA tests for them. | B.By studying their living habits. |
C.By comparing their appearances. | D.By studying documents about them. |
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【推荐1】The Australian environment department has not finalised a single recovery plan for threatened species in nearly 18 months. The last time the department completed a recovery plan was in June last year. And the department says it has no time frame for addressing the other requests for recovery plans, which include the critically endangered animal Leadbeater’s possum (澳洲负鼠).
Recovery plans are documents that outline key facts about endangered animals and plants, threats to their survival, and what should be done to prevent their extinction. Under national laws, it is the environment minister who decides whether a species requires a recovery plan. Once a plan is adopted, the minister cannot make any changes that might harm the plan. It has been previously reported that less than 40% of the listed threatened species have a recovery plan. A further 10% have been identified as requiring a recovery plan but those plans haven’t been developed.
The Australian Conservation Foundation said the exposure was “shocking” and accused the department of prioritizing the economic development over environmental protection. “The fact that iconic (最具代表性的) species like the possum still don’t have a recovery plan highlights how broken the system is,” James Trezise, a policy analyst at the Foundation, said. “It is a critical issue that the development and implementation of these plans seem to be optional. These plans should be developed, as required by law, and their implementation should be funded.”
Trezise said the significant delay in developing the plans stood “in sharp contrast” to the government’s rush to carry out environmental assessments for major projects like the one for the mining company Rio Tinto. “The department’s priorities are all wrong,” he said. “They can bring bills before the congress for mining projects that harm the environment, but they can’t get just one recovery plan for a threatened species completed.”
He said the delays would push more species closer to extinction. He called on the government to urgently address the issue and commit more resources to recovery planning. But for now, officials could not tell when the delays would be addressed, saying it would “take a very long time”. Emma Campbell, a senior official, said the department was working with an independent scientific committee to “reevaluate” which species should have a recovery plan.
1. The underlined phrase “the exposure” (Line 1, Para 3) refers to ______________.A.the coming extinction of many endangered animals |
B.the lack of funding for the implementation of the plan |
C.the denial of the critical situtaion facing some species |
D.the government’s delay in developing recovery plans |
A.They can be changed as the environment minister likes. |
B.They can help prevent endangered animals from going extinct. |
C.They document how endangered animals interact with humans. |
D.They cover more than half of the threatened species. |
A.The government has not done enough about the recovery plans. |
B.The endangered animal possum will be extinct in 18 months. |
C.The government prioritizes Rio Tinto over mining projects. |
D.The independent committee is vital to addressing the issue. |
A.Environment department accepting bribes |
B.Endangered animal protection with no funding |
C.Threatened species at risk with no recovery plans |
D.Government forming tense relationship with the public |
【推荐2】AI has been applied widely in a national park in northwestern China to track snow leopards (雪豹).
The AI-aided digital toolbox can tell snow leopards in Gansu province’s Qilian Mountains National Park from other wildlife, using images captured by infrared (红外线的)cameras.
Located around 3, 500 meters above sea level, the Qilian Mountains, with a large area of bare rocks sticking out from the grass, provide a favorable habitat for snow leopards. Though more than 200 cameras have been fixed in the area, sorting out relevant (有关的)information has not been easy for researchers. “To conduct further studies on the population, distribution and activities of the snow leopards, the cameras capture hundreds of thousands of videos and photos every quarter,” said Ma Duifang, who works for the Administration Bureau of Qilian Mountains National Park. “Even a slight movement in the environment, such as a pleasant wind blowing over the grass, can trigger (启动)the cameras. Sometimes, curious wildlife knock into the device, triggering the cameras, which take pictures of mere clouds.”Ma and his workmates had to go through each video, and information about the animals that appeared in the images also required human efforts. So it often took them several weeks to complete these tasks.
Thanks to Al technology, researchers in the Qilian Mountains National Park no longer need to rack their brains in search of snow leopards hiding in the wild. “The forest keepers can now locate a snow leopard from 1,000 pictures in only about 20 minutes, much faster than before,” said Huang Xiangqi, one of the technology’s developers. “We hope we can combine monitoring data with field investigations to help researchers identify the snow leopards so as to draw up a more specific plan for their protection.”
1. Why is it hard for researchers to sort out relevant information?A.The mountain is high. |
B.Snow leopards run too fast. |
C.They are badly in short of workmates. |
D.There are many irrelevant videos and photos. |
A.By searching for snow leopards in the forest. |
B.By making data processing quicker and easier. |
C.By controlling the movements of snow leopards. |
D.By recording snow leopards’ changing populations. |
A.Snow Leopard-a Most Important Animal in Gansu |
B.Ma Duifang-a Leading Expert in Snow Leopard Study |
C.Infrared Camera-a Creative Invention for Wildlife Protection |
D.Al-aided Technology-an Effective Helper in Snow Leopard Protection |
A.a news report | B.a scientific paper |
C.an official document | D.a product introduction |
【推荐3】“Adolescent chimpanzees (黑猩猩) are in some sense facing the same psychological characteristics that human teens are,” said Alexandra Rosati,a professor at the University of Michigan. “Our findings show that several key features of human adolescent psychology are also seen in our closest primate relatives.”
The researchers conducted two tests involving food rewards with 40 wild-born chimpanzees in Republic of Congo. The chimpanzees voluntarily participated in the games to receive food treats.
Chimpanzees experience adolescence at about 8 to 15. Like humans, chimpanzees show rapid changes in hormone levels during adolescence,start forming new bonds with companions, show increases in aggression and compete for social status.
In the first test, adolescent and adult chimpanzees could choose between two containers in a gambling (投机) task. One container always contained peanuts, a food that chimpanzees somewhat like. Hidden in the other one was either an unlined food — a cucumber slice — or a favorite food — a banana slice. The chimpanzees could play it safe and get the peanuts, or take a chance for some greatly desired banana at the risk of ending up with unappetizing cucumber. The chimpanzees’ emotional reactions were recorded, including angers, screams, or sticking on the table.
During several rounds of the test, adolescent chimpanzees took the risky option more often than adult chimpanzees, but adolescents and adults had similar negative reactions when they received cucumber.
The second test, modeled after the famous “marshmallow test” with human children, examined delayed satisfaction where chimpanzees could receive one banana slice immediately or wait for one minute to receive three slices. Both adolescent and adult chimpanzees chose the greater delayed reward at a similar rate. Human teens lend to be more impulsive (冲动) than adults so they would be more likely to take the immediate reward.
“Prior research indicates that chimpanzees are quite patient compared with other animals, and our study shows that their ability to delay satisfaction is already mature at a fairly young age, unlike in humans,” Rosati said.
Risk-taking behavior in both adolescent chimpanzees and humans appears to be deeply biologically rooted, but increases in impulsive behavior may be specific to human teens.
1. What does the first test aim to find out about chimpanzees?A.Their problems of emotions. | B.The signs of aggression. |
C.Their sense of adventure. | D.The change in hormone levels. |
A.Give it a try. | B.Take an action. |
C.Play with fire. | D.Avoid taking risks. |
A.Puzzled. | B.Delighted. | C.Disappointed. | D.Surprised. |
A.The chimpanzees prefer bananas to any other reward. |
B.Human adolescents tend to enjoy the instant satisfaction. |
C.Human teens’ ability to delay satisfaction develops better. |
D.The chimpanzees are impatient to wait for delayed rewards. |
Rice farming promotes a holistic(整体的)focus on distinguishing relationships among people and objects, and valuing others as much as or more than oneself, say psychologist Thomas Talhelm of the University of Virginia and his colleagues.Holistic thinking among many modem Chinese people partly reflects regional histories of building communal irrigation systems(共有灌溉系统)and cooperatively planting and harvesting rice fields over thousands of years.
They draw that conclusion based on studies of college students from regions with different agricultural practices. Students from southern and central China’s rice. growing provinces think holistically, even though they have probably never farmed rice,Talhelm’s group reports.In contrast, students from northern and central Chinese provinces that have specialized in wheat growing exhibit a preference for abstract analysis and self over others, the scientists find.Wheat is less labor-intensive(劳动密集型)to grow than rice, so farmers can plant and harvest crops without much help from neighbors.Analytical, individualistic thinking is not more common among students from richer
Provinces, contrary to the argument that this attitude springs from modernization. ”Rice theory might explain why East Asia is so much less individualistic than expected based on its wealth, ” Talhelm says.
Talhelm's team tested 1,162 Chinese students, who Viewed lists of three items, such as a rabbit, a dog and a carrot. For each list,students chose two items that belonged together. Earlier research found that analytical thinkers often group items according to categories, so rabbits and dogs go together. Holistic thinkers tend to look for relationships, such as rabbits eating carrots. Students from rice-growing areas made an average of around seven to nine holistic matches of 10 possible matches, compared with roughly five to seven holistic matches for those from wheat-growing areas.
Talhelm’s team also analyzed national statistics in China from 1996, 2000 and 2010 and found a higher divorce rate and a greater number of successful patents for new inventions in wheat-growing provinces than in rice-growing provinces. That trend is in line with the ides that analytical thinking develops both individualism and creativity.
1. People who think holistically probably_____________.
A.come from wheat—growing areas |
B.1ive in northern and central China |
C.rely more on themselves |
D.think of others before themselves |
A.East Asia is poorer than the other areas of Asia. |
B.Modernization contributes to analytic al thinking. |
C.Analytical thinkers tend to pick out items by type. |
D.Richer people show more individualistic thinking. |
A.making comparisons |
B.listing examples |
C.telling his personal experience |
D.presenting problem and solution |
A.Cultural differences in China |
B.Listing examples |
C.Chinese people tracing their roots |
D.Farming influences thinking styles |
【推荐2】In Japan many workers for large corporations have a guarantee of lifetime employment. They will not be laid off during recessions or when the tasks they perform are taken over by robots. To some observers, this is capitalism at its best, because workers are treated as people not things. Others see it as necessarily inefficient and believe it cannot continue if Japan is to remain competitive with foreign corporations more concerned about profits and less concerned about people.
Defenders of the system argue that those who call it inefficient do not understand how it really works. In the first place not every Japanese worker has the guarantee of a lifetime job. The lifetime employment system includes only “regular employees.” Many employees do not fall into this category, including all women. All businesses have many part time and temporary employees. These workers are hired and laid off during the course of the business cycle just as employees in the United States are. These “irregular workers” make up about 10 percent of the nonagricultural work force. Additionally, Japanese firms maintain some flexibility through the extensive use of subcontractors. This practice is much more common in Japan than in the United States.
The use of both subcontractors and temporary workers has increased markedly in Japan since the 1974-1975 recession. All this leads some people to argue that the Japanese system really is not all that different from the American system. During recessions Japanese corporations lay off temporary workers and give less business to subcontractors. In the United States, corporations lay off those workers with the least working experience. The difference then is probably less than the term “lifetime employment” suggests, but there still is a difference. And this difference cannot be understood without looking at the values of Japanese society. The relationship between employer and employee cannot be explained in purely contractual terms. Firms hold on to the employees and that employees stay with one firm. There are also practical reasons for not jumping from job to job. Most retirement benefits come from the employer. Changing jobs means losing these benefits. Also, teamwork is an essential part of Japanese production. Moving to a new firm means adapting to a different team and at least temporarily, lower productivity and lower pay.
1. According to the passage, a woman in Japan _________.A.cannot get a lifetime job | B.is impossible to get a part time job |
C.will be employed for life | D.is among the regular workers |
A.They don’t want to lose their retirement benefits. | B.They are not adaptable people. |
C.Any change of jobs will make them less paid. | D.They get used to the teamwork. |
A.those who want to change jobs frequently in Japan should think twice |
B.those who are first laid off by American corporations are temporary workers |
C.the use of subcontractors makes Japanese firms less flexible |
D.the Japanese system is totally different from the American system |
A.The extremely hard situation during recessions. |
B.The extensive use of subcontractors in Japan. |
C.The characteristics of corporations in the United States. |
D.The features of lifetime employment in Japan. |
【推荐3】Kids everywhere love to play. And they know that a ball is a perfect thing to play with. Now scientists report bumblebees (大黄蜂) seem to know the same thing, making bumblebees the first insects known to play.
Lots of animals play. But the behavior is best known in mammals and birds. For many animals, playing is often seen as a kind of training for things they’ll have to deal with in later life. But before this, there were no reports of insects playing.
Dr. Lars Chittka did an earlier experiment, where he trained bumblebees to roll balls into a goal for food. He noticed some bees were rolling balls even when they weren’t rewarded. He wondered if they were playing.
To test the idea, he with other scientists set up a new experiment. First, they marked 45 young bumblebees, both male and female, between one and 23 days old. Then they set up a clear pathway from the bumblebees’ nest to a feeding area. On either side of the open pathway, small colored wooden balls were placed. On one side of the path, the balls couldn’t move. On the other side, the balls could roll around.
For three hours a day over 14 days, the scientists opened the pathway. The bumblebees never had to leave the pathway to find food, but they left anyway. They weren’t so interested in the side where the balls couldn’t move, but they made lots of visits to the side with the rolling balls.
Grabbing the balls with their legs, the bumblebees would beat their wings to pull on the balls, causing them to roll. The 45 marked bumblebees did this 910 times during the experiment. Though some only did it once, others did it a lot. The scientists found the younger bumblebees spent more time rolling balls, and that males seemed more likely to play than females.
The scientists say it’s not clear why the bumblebees roll the balls or whether they enjoy it. But the experiment raises important questions about how the insects’ minds work and whether they have feelings.
1. What does the underlined word in Paragraph 2 refer to?A.The discovery that many insects like playing. |
B.The experiment about mammals’ living habits. |
C.The report that bumblebees play for fun. |
D.The comparison between insects and birds. |
A.Bumblebees’ types. | B.Bumblebees’ habitats. |
C.Bumblebees’ behavior. | D.Bumblebees’ food. |
A.Male bumblebees tend to play balls more often. |
B.Colorful balls are bumblebees’ favourite toys. |
C.Younger bumblebees are better at rolling balls. |
D.Bumblebees show interest in anything round. |
A.Bumblebees Act Just Like Kids | B.Balls Are a Perfect Thing to Play with |
C.Playing Is Animals’ Second Nature | D.Bumblebees Are First Insect Known to Play |