1 . Lisa St. Coeur Cormier, a high school science teacher in Prince Edward Island (PEI), Canada, found a tree root. When she took a closer look, she found the shape was very strange. She realized it wasn’t a tree root though it shared the same color. She felt it was hard to break and noticed an impression of bones of what looked like some kind of animal.
Cormier sent a photo of the find to Laura MacNeil who used her knowledge in this field to confirm that what Cormier had seen really was a fossil (化石). MacNeil runs tours of sites where prehistoric fossils have been found and also helps people identify fossils. She visited the site of Cormier’s find to take more photos of it.
MacNeil contacted John Calder, a scientist, who examined the fossil and led a team of scientists to study it. John Calder said it could be as much as 300 million years old. He said it’s probably from a reptile (爬行动物) of some kind — likely one that is unknown to scientists. Scientists spent 5.5 hours carefully digging out the fossil from the ground so they could study it more in-depth and find out exactly what kind of animal it is. That research could take a year or more.
“This is an important discovery here on Prince Edward Island. It is the second of the only two articulated skeletons (关节相连的骨头) found on PEI,” Laura MacNeil said. “This creature lived about 300 million years ago. This find tells us there is a great possibility for future scientifically important fossils that could be discovered on PEI. It will lead to more researchers paying a visit.”
1. How might Cormier feel when looking at the root carefully?A.Satisfied. | B.Surprised. | C.Concerned. | D.Proud. |
A.The scientists will have a detailed study on the fossil. |
B.The scientists have identified the species of the fossil. |
C.The scientists will keep the fossil under the ground. |
D.The scientists discovered the first articulated skeleton. |
A.Its long history. | B.Its wide popularity. |
C.Its scientific value. | D.Its economic importance. |
A.A scientist’s research on fossils | B.PEI is attracting more researchers |
C.Cormier’s unforgettable tour in PEI | D.A science teacher discovered a fossil |
2 . According to a new research, published in the journal Nature by a team from the University of Liverpool, humans were building structures made of wood, dating back at least 476,000 years ago. The research team found well-preserved wood at the site of Kalambo Falls, Zambia. Stone tool cut-marks on the wood show that these early humans shaped and joined two large logs (原木) to make a structure, probably the foundation of a platform. This is the earliest evidence in the world of the designed arrangement of logs to fit together.
Until now, evidence for the human use of wood was limited to its use for making fire, digging sticks and other tools. Wood is rarely found in such ancient sites as it usually rots and disappears, but at Kalambo Falls permanently high water levels kept the wood.
This discovery challenges the prevailing view that Stone Age humans were moving around. Here humans not only had a constant source of water, but the forest around them provided enough food to enable them to settle and make structures. Professor Larry Barham, from the University of Liverpool, who leads the “Deep Roots of Humanity” research project said, “This find has changed how I think about our early ancestors. They used their intelligence, imagination, and skills to create something they’d never seen before, something that had never previously existed.”
The special new luminescence (冷光) dating technique was carried out by experts, which explains the last time materials in the sand surrounding the finds were exposed to sunlight, to determine their age. This research forms part of the pioneering “Deep Roots of Humanity” project. Professor Barham added, “Kalambo Falls is an extraordinary site in Zambia. The Deep Roots team is looking forward to more exciting discoveries coming from its waterlogged sands.”
1. What is the finding of the new research?A.Wood was used for construction. | B.Wood pieces were joined for fun. |
C.Ancestors were good at architecture. | D.Ancient people designed wood products. |
A.Obvious. | B.Common. | C.Deep. | D.Strong. |
A.Energy-saving. | B.Time-consuming. | C.Ground-breaking. | D.Problem-solving. |
A.More discoveries come from Kalambo Falls. | B.Something can be done to protect Zambia. |
C.The sands used for research can be saved. | D.The site is set aside for further studies. |
3 . Human footprints in White Sands National Park in New Mexico aroused an argument two years ago when scientists found the prints to be surprisingly old.
In 2021, researchers described more than 60 footprints preserved in New Mexico. Radiocarbon dating(放射性碳定年法)of an aquatic(水生的)plant’s seeds in and around the footprints suggested that the first humans in North America came from Siberia via a land bridge between 23,000 and 21,000 years ago, almost 7000 years earlier than the long-held theory.
But some scientists noted that the aquatic plants used to date the footprints could have absorbed ancient carbon in groundwater. “There’s a possibility then for the plant to give overstated viewpoints on its age,” says Davis, who wrote a criticism of the 2021 paper.
Now, two other ways probably solving the argument, researchers report in the Oct. 6 Science. Pigati and colleagues radiocarbon-dated pollen(花粉)stuck in the same layers as some of the footprints. The pollen came from land plants, mainly pine, avoiding the groundwater carbon issue. The researchers also collected stones above the lowest footprints and used a dating method that estimates how long the stones had been buried.
The pollen gave an age range of 23,400 to 22,600 years old, and the stone an age minimum of about 21,500 years old. Both results proved the previous age estimate. Despite possible errors in the individual dating methods, “the data overall from the new study strongly indicate human presence in the Americas” around 22,000 years ago, says Bente Philippsen, a physicist at the Norwegian University.
One thing is certain: There’s still plenty to uncover about the footprints.Coauthor Kathleen Springer says, “We are learning more every time we go out there,” she says. “This paper is literally the latest chapter in the White Sands story.”
1. How many possible methods does the text mention to settle the controversy?A.Only one. | B.Two. | C.Three. | D.Four. |
A.Aquatic plants might have absorbed groundwater. |
B.Aquatic plant’s seeds in and around the footprints are different. |
C.The method of radiocarbon dating is not scientifically reliable at all. |
D.Groundwater carbon will affect the amount of radiocarbon detected. |
A.How the age estimation proved to be wrong. |
B.Whether radiocarbon dating method is effective. |
C.Why there was human presence in the American. |
D.What conclusion can be made through the research. |
A.Supportive. | B.Uninterested. | C.Confused. | D.Critical . |
Over 2,500 pieces of cultural relics dating back up to 2,200 years were unearthed in Guang zhou, capital of south China’s Guangdong Province, local authorities said Friday. The cultural relics were unearthed at
The
“The excavation outcomes are
5 . A small group of paleontologists (古生物学家) recently discovered 10 species of ancient mammals previously unknown to science with the help of an enormous number of helpers at their dig site: ants.
The study of ancient mammals sheds new light on the diversity of mammals that existed in North America around 33 million to 35 million years ago, when the climate was changing drastically. It also pays attention to the harvester ants, with which re-searchers have long had a love-hate relationship. “The ants are not fantastic when they’re biting you,” said Samantha Hopkins, a professor of Earth Sciences at the University of Oregon. “But I’ve got to appreciate them because they make my job a whole lot easier.”
Most species of harvester ants live in caves that sit beneath a small hill of dirt. They strengthen the dirt by cowering it with bits of rock and other tough materials. The ants have been known to travel over a hundred feet from their caves and to dig six feet deep in pursuit of materials that help secure their caves. The materials include fossils. Harvester ants can carry materials 10 times to 50 times the weight of their body, although they do not weigh very much, so the heaviest fossil they can collect weighs less than the average pill.
Given the size, harvester ant hills are hot spots for what scientists call fossils, which are animal fossils too small to see with-out a microscope. For over a century, scientists like Dr. Hopkins have found sediment (沉积物) off the sides of harvester ant hills in search of these fossils, making it easier to find large numbers of fossilized mammal teeth without spending hours in the field sifting through sand and dirt.
1. What is the purpose of the passage?A.To compare two different species. |
B.To provide evidence for discoveries. |
C.To introduce a kind of ant as a helper. |
D.To promote awareness of mammal protection. |
A.Climate change. | B.Ant numbers. |
C.Cave materials. | D.Dirt locations. |
A.beside. | B.besides. | C.upper. | D.below. |
A.Their caves are miles deep. |
B.Materials with fossils are their food. |
C.They can carry pills around. |
D.Fossils may be found around their hills. |
A great number of artifacts from eight tombs
Six Eastern Han Dynasty tombs are brick tombs, three of
It is also the first time that archaeologists
“This excavation(挖掘)is
The remains of an incomplete gold mask was among the 3,000-year-old items found at Sanxingdui, an archaeological site in Guanghan, Sichuan Province.
A large number of ancient artifacts
Items found at the site have helped scientists learn more about Sanxingdui and
8 . In 1823, a young woman noticed a strange fossil (化石) on a beach near Lyme Regis, England. She dug out the bones and had them carried to her home.She carefully arranged the skeleton(骨架) on a table. Then she saw something extraordinary. The creature’s neck was a meter long-more than half the length of its body. It was unlike any animal living on Earth.
Even at a young age, Mary Anning had a talent for spotting unusual fossils. Her father died in 1810, leaving her family in.debt, so Mary began selling her fossils to collectors. At 12, she made her first major discovery—a crocodile-like skull(头骨) with a long skeleton. It turned out to be a sea creature that lived long ago. Named ichthyosaur, or “fish-lizard”, it was the first extinct animal known to science.
Fossil hunting brought in money, but it was a dangerous job. One day, a rock fall killed her dog and almost buried Mary. Despite the dangers, she continued to look for mew finds The long-necked fossil she unearthed in 1823 was another long-dead sea reptile(爬行动物). Known as a plesiosaur, it would inspire legends—including that of the Loch Ness Monster.
Mary was not only a skilled fossil hunter; she also carefully examined and recorded her finds. However, she wasn’t widely recognized in the scientific community. Only one of her scientific writings got published in her lifetime, in 1839. She was also not allowed to join London’s Geological Society, as membership was only available to men.
Mary Anning died in 1847, but her contributions have not been forgotten. Her finds are now displayed in museums in London and Paris. The beach near her home is a UNFSCO World Heritage Site, known as the Jurassic Coast. Her life continues to inspire visitors hoping to find their own fossil wonders. According to Britain’s Natural History Museum, Mary Anning was “the greatest fossil hunter the world has ever known”.
1. The first paragraph is written to_________.A.stress the hard work Mary Anning carried out |
B.prove the uniqueness of Mary Anning;s finds |
C.introduce the readers to Mary Anning;s story |
D.show the importance of Mary Anning;s discovery |
A.Her main purpose was to make scientific contributions. |
B.She found it hard to make ends meet as a fossil hunter. |
C.She made her first major discovery in 1823. |
D.She had a narrow escape from a rock fall. |
A.Mary Anning deserved more credit. |
B.More people should join in fossil hunting. |
C.The Jurassic Coast is in need of protection. |
D.Mary Anning is the greatest scientist in the world. |
A.By providing examples. |
B.By making comparisons. |
C.By following the order of time. |
D.By following the order of importance. |
9 . Scientists have solved a puzzle about modern humans, after research showed that a famous skull of a human ancestor found in South Africa is a million years older than experts thought. This discovery has changed what we know of human history.
The skull, which scientists have named “Mrs Ples”, is from an ape-like human relative from a species called Australopithecus africanus (南方古猿). It was found near Johannesburg in 1947 and, based on evidence from its surroundings, was thought to be between 2. 1 and 2. 6 million years old. This puzzled scientists, because although Mrs Ples looks like a possible early ancestor of early humans, the first true humans had already evolved by the time she apparently lived. For this reason, scientists had decided that Australopithecus afarensis, a similar species from East Africa that lived about 3.5 million years ago, was our most likely ancestor instead.
To get a more accurate age for Mrs Ples, a team led by Professor Darryl Granger of Purdue University in Indiana, US, used a new method to date the sandy rocks where the skull lay. They measured the amount of certain chemicals in rocks, which form at a steady rate when they are exposed to cosmic rays (宇宙射线) on Earth’s surface. Once rocks are buried, these chemicals stop forming and slowly disappear;the surviving amount reveals how much time has passed since the rock (or bones) were on the surface.
The new study shows that Mrs Ples and other australopithecine bones nearby are between 3.4 and 3.7 million years old. This means they lived at the same time as their East African relatives, so that either group could have given rise to modern humans. However, team member Dr Laurent Bruxelles pointed out that over millions of years, at only 2,500 miles away, these groups had plenty of time to travel and to breed with each other. In other words, the groups could quite easily have met, had children together and both been part of the history of modern humans.
1. What can we learn about Mrs Ples from the first two paragraphs?A.It is a skull found in East Africa. |
B.It is the most possible ancestor of humans. |
C.It is a million years older than scientists expected. |
D.It is proved to live between 2.1 and 2.6 million years ago. |
A.By studying the effect of cosmic rays. |
B.By calculating the forming rate of chemicals. |
C.By locating the sandy rocks where the skull lay. |
D.By measuring the surviving amount of chemicals. |
A.Modern humans came into being in East Africa. |
B.Mrs Ples travelled and had children with East African relatives. |
C.The history of modern humans might begin 3.5 million years ago. |
D.Ape-like species from Africa could have interacted with each other. |
A.Historical Puzzle Unsolved | B.Ancestor Mystery Solved |
C.Mrs Ples: The Earliest Human Being | D.Mrs Ples: A Famous Skull |
10 . The remains of a gold mask are among a huge quantity of 3,000-year-old artifacts (文物) found at an archaeological (考古的) site in China’s Sichuan province.
Weighing about 280 grams and estimated to be made from 84% gold, the ceremonial mask is one of over 500 items unearthed from six newly discovered “sacrificial pits” (祭祀坑), according to the country’s National Cultural Heritage Administration.
The finds were made at Sanxingdui, a 4.6-square-mile area outside the provincial capital of Chengdu. Some experts say the items may shine further light on the ancient Shu state, a kingdom that ruled in the western Sichuan basin before 316 BC.
In addition to the gold mask, archaeologists uncovered bronzes (青铜器) and artifacts made from other materials such as bone. The six pits also contained an as-yet-unopened wooden box and a bronze container with owl-shaped patterning.
More than 50,000 ancient artifacts have been found at Sanxingdui since the 1920s, when a local farmer accidentally came upon some remains at the site. A major breakthrough occurred in 1986, with the discovery of two ceremonial pits containing over 1,000 items, including delicate and well-preserved bronze masks. Discoveries made at the site date back to the 12th and 11th centuries BC.
Sanxingdui has completely revolutionized experts’ understanding of how civilization developed in ancient China. In particular, evidence of a unique Shu culture suggests that the kingdom developed independently of neighboring societies in the Yellow River Valley, which was traditionally considered to be the birthplace of Chinese civilization.
Though not yet recognized as a UNESCO World Heritage Site, Sanxingdui is on the organization’s list for possible future inclusion. Along with other Shu archaeological sites, it is credited by the UN agency as “an outstanding representative of the Bronze Age Civilization of China, East Asia and even the world.”
1. What does the underlined phrase “shine further light on” in paragraph 3 probably mean?A.Make greater progress in. | B.Have a deeper influence on. |
C.Provide more information about. | D.Engage more attention to. |
A.It changes experts’ understanding of how Chinese civilization developed. |
B.It confirms that the Shu Kingdom developed in the Yellow River Valley. |
C.It implies that the Yellow River Valley is the birthplace of Chinese civilization. |
D.It shows Sanxingdui symbolizes a fundamental change in Chinese society. |
A.Sanxingdui’s history of discovery. | B.The world’s recognition of Sanxingdui. |
C.The difficulty in discovering Sanxingdui. | D.The preservation of Sanxingdui’s remains. |
A.Sanxingdui Accidentally Discovered by a Local Farmer |
B.3,000-year-old Gold Mask Uncovered in Southwest China |
C.Outstanding Representatives of the Bronze Age Kingdom |
D.New Addition to the List of UNESCO World Heritage Sites |