Fifty thousand years ago, a lush environment greeted the first Australians as they journeyed towards the southeast of the continent. The climate was cooler than it is today. Megafauna – large prehistoric animals such as marsupial lions, goannas, and the rhinoceros-sized diprotodon – were plentiful. The Lake Mungo remains are three prominent collections of fossils that recount the archaeologists' narrative: Mungo Man lived around the shores of Lake Mungo with his family. When young, Mungo Man lost his two lower canine teeth, possibly knocked out during a ritual. He grew to a height of nearly 1.7m. Over the years, his molar teeth became worn and scratched, perhaps from a gritty diet or using his teeth to strip long leaves of water reeds to make twine. As Mungo Man aged, his bones ached with arthritis, especially his right elbow, which was so damaged that bits of bone were completely worn out or broken away. Such wear and tear are typical of people who have used a woomera to throw spears over many years. Mungo Man lived to a ripe old age for a hunter-gatherer and died around the age of 50. His family mourned his loss and carefully buried him in the lunette, on his back with his hands crossed in his lap, sprinkled with red ochre. Mungo Man is the oldest known example in the world of such a burial ritual.
B
This trove of history was discovered by University of Melbourne geologist Professor Jim Bowler in 1969. He was searching for ancient lakes and came across the charred remains of Mungo Lady, who had been cremated. And in 1974, he found a second complete skeleton, Mungo Man, buried 300 meters away. Using carbon-dating, a technique only reliable to around 40,000 years old, the skeleton was initially estimated to be between 28,000 and 32,000 years old. The extensive study of 25 different sediment layers at Mungo concludes that both graves date back 40,000 years.
C
This is much younger than the 62,000 years Mungo Man was dated to in 1999 by a team led by Professor Alan Thorne of the Australian National University. The modern story of the science of Mungo also has its fair share of competition. Thorne is the country's leading opponent of the Out of Africa theory – that Homo sapiens had a single place of origin. “Dr Alan Thorne supports the multi-regional explanation (that modern humans arose simultaneously in Africa, Europe and Asia from one of our predecessors, Homo erectus, who left Africa more than 1.5 million years ago.) if Mungo Man was descended from a person who had left Africa in the past 200,000 years, Thorne argues, then his mitochondrial DNA should have looked like that of the other samples.”
D
However, supporters of the Out of Africa theory are not willing to abandon their beliefs due to the Australian research. Professor Chris Stringer, from the Natural History Museum in London, UK, stated that the research community would want to see the work repeated in other laboratories before drawing major conclusions from the Australian research. However, even if the DNA sequences were correct, Professor Stringer said it could simply mean that there was much more genetic diversity in the past than previously realized. There is no evidence here that the ancestors of these Australian fossils go back a million or two million years. It is much more likely that modern humans came out of Africa.” For Bowler, these debates are irritating speculative distractions from the main findings of the study. At 40,000 years old, Mungo Man and Mungo Lady remain Australia's oldest human burials and the earliest evidence on Earth of cultural sophistication, he says. Modern humans had not even reached North America by this time. In 1997, Pddbo's research group recovered an mtDNA fingerprint from the Feldholer Neanderthal skeleton uncovered in Germany in 1865 – the first Neanderthal remains ever found.
E
In its 1999 study, Thorne’s team used three techniques to date Mungo Man at 62,000 years old, and it stands by its figures. It dated bone, teeth enamel and some sand. Bowler has strongly challenged the results ever since. Dating human bones is “notoriously unreliable,” he says. Also, the sand sample that Thorne’s group dated was taken hundreds of meters from the burial site. “You don’t have to be a gravedigger … to realize the age of the sand is not the same as the age of the grave,” says Bowler.
F
Thorne counters that Bowler's team used one dating technique, while he used three. The best practice is to have at least two methods produce the same result. A Thorne team member, Professor Rainer Grün, says that the fact that the latest results were consistent between laboratories doesn’t mean they are absolutely correct. We now have two data sets that are contradictory. I do not have a plausible explanation.” Now, however, Thorne says the age of Mungo Man is irrelevant to this origin debate. Recent fossils findings show that modern humans were in China 110,000 years ago. “So he has got a long time to turn up in Australia. It doesn’t matter if he is 40,000 or 60,000 years old.
G
Dr Tim Flannery, a proponent of the controversial theory that Australia’s megafauna were wiped out 46,000 years ago in a “blitzkrieg” of hunting by the arriving people, also claims the new Mungo dates support this view. In 2001 a member of Bowler’s team, Dr Richard Roberts of Wollongong University, along with Flannery, director of the South Australian Museum, published research on their blitzkrieg theory. They dated 28 sites across the continent, arguing their analysis showed the megafauna died out suddenly 46,000 years ago. Flannery praises the Bowler team’s research on Mungo Man as “the most thorough and rigorous dating” of ancient human remains. He says the finding that humans arrived at Lake Mungo between 46,000 and 50,000 years ago was a critical time in Australia’s history. There is no evidence of a dramatic climatic change then, he says. “It’s my view that humans arrived and extinction took place in almost the same geological instant.”
H
Bowler, however, remains skeptical of Flannery's theory and says the Mungo study provides no definitive new evidence to support it. He argues that climate change 40,000 years ago was more intense than previously realized and could have played a role in the megafauna’s disappearance. “Blaming the earliest Australians for their complete extinction is drawing a longbow.”
Questions 1-8
Use the information in the passage to match the people (listed A-F) with opinions or deeds below.
Write the appropriate letters A-F in boxes 1-8 on your answer sheet.
NB You may use any letter more than once.
A Jim Bowler
B Alan Thorne
C Pddbo
D Tim Flannery
E Chris Stringer
F Rainer Grün
1 He was searching for ancient lakes and came across the charred remains of Mungo Lady, who had been cremated.
2 Professor who hold a skeptical attitude towards reliability for DNA analysis on some fossils.
3 Professor whose determination of the age of Mungo Man to be much younger than the former result, which is older than the 62,000 years.
4 Determining the age of Mungo Man has little to do with controversy for the origins of Australians.
5 Research group who recovered a biological proof of the first Neanderthal found in Europe.
6 A supporter of the idea that Australia’s megafauna was extinct due to the hunting by the ancient human beings.
7 Instead of keep arguing a single source origin, multi-regional explanation has been raised.
8 Climate change rather than prehistoric human activities resulted in megafauna’s extinction.
Questions 9-14
Do the following statements agree with the information given in Reading Passage 1?
In boxes 9-14 on your answer sheet, write
TRUE if the statement is true
FALSE if the statement is false
NOT GIVEN if the information is not given in the passage
9 The Lake Mungo remains offer the archeologists evidence of graphic illustration of human activities around.
10 In Lake Mungo remains, weapons were found used by the Mungo.
11 Mungo Man is one of the oldest known archeological evidence in the world of cultural sophistication such as a burying ritual.
12 Mungo Man and woman’s skeletons were uncovered in the same year.
13 There is controversy among scientists about the origin of the oldest Homo sapiens.
14 Out of Africa supporters have criticised Australian professors for using an outmoded research method.
Answer:
1. A (Đoạn B, “Professor Jim Bowler in 1969. He was searching for ancient lakes and came across the charred remains of Mungo Lady, who had been cremated.”)
2. E (Đoạn D, But even assuming the DNA sequences were correct, Professor Stringer said it could just mean that there was much more genetic diversity in the past than was previously realised.”).
3. A (Đoạn B, “Mungo Man, buried 300 metres away. Using carbon-dating, a technique only reliable to around 40,000 years old, the skeleton was first estimated at 28,000 to 32,000 years old.”).
4. B (Đoạn C, “Because Thorne is the country’s leading opponent of the Out of Africa theory – that Homo sapiens had a single place of origin.”).
5. C (Đoạn D, “Pddbo’s research group recovered an mtDNA fingerprint from the Feldholer Neanderthal skeleton uncovered in Germany in 1865 – the first Neanderthal remains ever found.”)
6. D (Đoạn G, “They dated 28 sites across the continent, arguing their analysis showed the megafauna died out suddenly 46,000 years ago. Flannery praises the Bowler team’s research on Mungo Man as “the most thorough and rigorous dating” of ancient human remains.”)
7. B (Đoạn C, “Dr Alan Thorne supports the multi-regional explanation…”)
8. A (Đoạn H, “Bowler, however, is skeptical of Flannery’s theory and says the Mungo study provides no definitive new evidence to support it. He argues that climate change at 40,000 years ago was more intense than had been previously realized and could have played a role in the megafauna’s demise.”)
9. TRUE (Đoạn A, “The Lake Mungo remains are three prominent sets of fossils which tell the archeologists the story…”)
10. NOT GIVEN (Không có thông tin)
11. TRUE (Đoạn A, “Mungo Man is the oldest known example in the world of such a ritual.”
12. FALSE (Đoạn B, “…in 1969. He was searching for ancient lakes and came across the charred remains of Mungo Lady, who had been cremated. And in 1974, he found a second complete skeleton,…”)
13. TRUE (Đoạn D, “But even assuming the DNA sequences were correct, Professor Stringer said it might simply indicate that there was much greater genetic diversity in the past than previously realized. There's no evidence here that the lineage of these Australian fossils extends back a million or two million years. It’s far more likely that modern humans originated from Africa.”)Luyện thi IELTS