Archive for ‘Findings’

07/05/2020

Xinhua Headlines: Archaeological findings provide key proof of Chinese civilization origin

— Chinese archaeologists announced significant achievements at the Shuanghuaishu site in central China’s Henan Province, providing key proof of the origin of the over 5,000-year-long Chinese civilization.

— With an area of 1.17 million square meters, the Shuanghuaishu site, dating back to around 5,300 years, is located on the south bank of the Yellow River in the township of Heluo, Gongyi City, and was proposed to be named “Heluo kingdom.”

— A large number of relics of the Yangshao Culture dating back 5,000 to 7,000 years have been discovered at the site.

by Xinhua writers Xu Ruiqing, Wang Ding, Gui Juan, Shuang Rui

ZHENGZHOU, May 7 (Xinhua) — Chinese archaeologists announced Thursday significant achievements at the Shuanghuaishu site in central China’s Henan Province, providing key proof of the origin of the over 5,000-year-long Chinese civilization.

With an area of 1.17 million square meters, the Shuanghuaishu site is located on the south bank of the Yellow River in the township of Heluo, Gongyi City.

The ancient city relic dating back to around 5,300 years ago was proposed by Chinese archaeologists to be named “Heluo kingdom” after its location in the center of the Heluo area, where the Yellow River (known as He in ancient China) and the Luohe River meet.

“The Shuanghuaishu site is the highest-standard cluster with the nature of a capital city discovered so far in the Yellow River basin in the middle and late stage of Yangshao Culture, the early stage of the formation of Chinese civilization,” said Li Boqian, a professor at Peking University, at a press conference on major archaeological discoveries at Shuanghuaishu site held Thursday in Zhengzhou, the provincial capital.

Aerial photo taken on Aug. 27, 2019 shows the Shuanghuaishu site in central China’s Henan Province. (Xinhua/Li An)

A large number of relics of the Yangshao Culture dating back 5,000 to 7,000 years have been discovered at the site, said Gu Wanfa, director of the Zhengzhou Municipal Research Institute of Cultural Relics and Archaeology, at the press conference.

“The important archaeological findings provide key proof of the origin of Chinese civilization, and also prove the representativeness and influence of the Heluo area in the golden stage of the origin of Chinese civilization around 5,300 years ago,” said Wang Wei, a member of the Chinese Academy of Social Sciences.

Since 2013, the Zhengzhou Municipal Research Institute of Cultural Relics and Archaeology and the Institute of Archaeology of the Chinese Academy of Social Sciences have conducted continuous archaeological excavations on the site.

According to archaeologists, the Shuanghuaishu site was about 1,500 meters long from east to west and 780 meters wide from north to south. It was surrounded by three ring trenches with each found to have external access, forming a strict defense system.

Aerial photo taken on Aug. 27, 2019 shows the Shuanghuaishu site in central China’s Henan Province. (Xinhua/Li An)

The central residential area with four rows of houses was found in the northern part of the inner ring moat. Meanwhile, three public cemeteries with more than 1,700 tombs, three sacrificial remains, an astronomical relic, a pottery workshop area, a water storage area, a road system, and other facilities were also discovered at the city ruins.

“The Shuanghuaishu site was a well-selected and scientifically planned settlement site,” said Wang.

“Based on the geographical location and scale, it’s also the only large-scale city settlement discovered so far in the Yellow River basin from the middle and late stage of Yangshao Culture,” Wang added.

Archaeologists believe that the Heluo kingdom was the source of many typical characteristics of Chinese civilization.

Silk originated in China and later became one of the country’s major trade items. “The mulberry-growing and silkworm-raising culture was an important component of Chinese civilization,” said Li.

Among the unearthed relics at Shuanghuaishu, a boar tusk carving of a silkworm, 6.4 cm long, nearly 1 cm wide and 0.1 cm thick, was believed to be China’s earliest carving depicting silkworms.

Undated photo shows a boar tusk carving of a silkworm unearthed at the Shuanghuaishu site in central China’s Henan Province. (Xinhua)

Experts say that the carving depicts a spinning silkworm which is quite similar to modern silkworms in appearance. “The spinning shape of the carving suggests that ancient Chinese people were familiar with the habits of silkworms,” said Gu.

Along with silk fabrics unearthed at the surrounding Wanggou site and Qingtai site, archaeologists said they are solid evidence to prove that the ancient Chinese in the Yellow River basin began raising silkworms and silk production around 5,300 years ago.

“Except Shuanghuaishu and its surrounding settlement sites, there were no definite discoveries from around 5,300 years ago related to the silk textile industry in other parts of the country,” said Li. “In that sense, they are the earliest representatives in the development history of Chinese mulberry cultivation and silkworm-rearing culture.”

Meanwhile, at the astronomical relic at Shuanghuaishu, nine pottery pots were arranged in the pattern of the nine stars of the Big Dipper, which shows that the ancestors of Heluo had relatively mature astronomical knowledge.

Photo taken on April 28, 2020 shows one of nine pottery pots arranged in the pattern of the nine stars of the Big Dipper, at an astronomical relic at the Shuanghuaishu site in central China’s Henan Province. (Xinhua/Li An)

“The relic also indicates the worship of the celestial body may have formed a grand sacrificial ceremony for observing the solar terms and praying for a good harvest,” said Gu.

Experts also believe the astronomical relic and the surrounding sacrificial remains constitute a whole, which is consistent with the records of winter solstice sacrifices in ancient Chinese documents. “It is of great significance to the study of early Chinese astronomy and the origin of Chinese civilization,” added Gu.

Source: Xinhua

29/04/2020

Coronavirus outbreak in France did not come directly from China, gene-tracing scientists say

  • Researchers conclude that the virus was circulating undetected in France in February
  • Findings highlight the difficulties governments face in tracing the source of coronavirus outbreaks
Researchers in France have carried out genetic analysis and found that the dominant types of the viral strains in the country did not come from China or Italy. Photo: AP
Researchers in France have carried out genetic analysis and found that the dominant types of the viral strains in the country did not come from China or Italy. Photo: AP
The coronavirus outbreak in France was not caused by cases imported from China, but from a locally circulating strain of unknown origin, according to a new study by French scientists at the Institut Pasteur in Paris.
Genetic analysis showed that the dominant types of the viral strains in France belonged to a clade – or group with a common ancestor – that did not come from China or Italy, the earliest hotspot in Europe.
“The French outbreak has been mainly seeded by one or several variants of this clade … we can infer that the virus was silently circulating in France in February,” said researchers led by Dr Sylvie van der Werf and Etienne Simon-Loriere in a non-peer reviewed paper released on bioRxiv.org last week.
The Covid-19 pandemic has infected more than 128,000 people in France and caused more than 23,000 deaths.
France detected the virus in late January, before any other country in Europe. A few patients with a travel history that included China’s Hubei province were sampled on January 24 and tested positive.
The Covid-19 pandemic has infected more than 128,000 people in France and caused more than 23,000 deaths. Photo: AFP
The Covid-19 pandemic has infected more than 128,000 people in France and caused more than 23,000 deaths. Photo: AFP
The French government took quick and decisive measures to trace contacts of the infected people and shut down the chance of further infection.

However, these strains were not found in patients tested after the initial imported cases, suggesting “the quarantine imposed on the initial Covid-19 cases in France appears to have prevented local transmission”, the researchers said.

The Pasteur institute collected samples from more than 90 other patients across France and found the strains all came from one genetic line. Strains following this unique path of evolution had so far only been detected in Europe and the Americas.

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The earliest sample in the French clade was collected on February 19 from a patient who had no history of travel and no known contact with returned travellers.

Several patients had recently travelled to other European countries, the United Arab Emirates, Madagascar and Egypt but there was no direct evidence that they contracted the disease in these destinations.

To the researchers’ surprise, some of the later strains collected were genetically older – or closer to the ancestral root – than the first sample in this clade.

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A possible explanation, according to the authors, was that local transmission had been occurring in France for some time without being detected by health authorities.
The French government may have missed detecting the transmission. According to the researchers, a large proportion of those patients might have had mild symptoms or none at all.

The researchers also found that three sequences later sampled in Algeria were closely related to those in France, suggesting that travellers from France might have introduced the virus to the African country and caused an outbreak.

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Benjamin Neuman, professor and chair of biological sciences with the Texas A&M University-Texarkana, said the French strains might have come from Belgium, where some sequences most closely related to the original strain from China were clustered.

“Since the earliest European strains of [the coronavirus] Sars-CoV-2 seem to be associated with Belgium, the idea that the virus spread from Belgium to both Italy and France at around the same time seems plausible, as this paper contends,” he said.

France is the latest in a growing number of countries and areas where no direct link between China and local outbreaks could be established.

The dominant strains in Russia and Australia, for instance, came from Europe and the United States, respectively, according to some studies.

These findings have drawn fire from some politicians who have tried to deflect domestic anger over their handling of the crisis by blaming China.

US President Donald Trump lashed out on social media after two separate teams in the US found the strains devastating New York came from Europe.

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“So now the Fake News @nytimes is tracing the CoronaVirus origins back to Europe, NOT China. This is a first!” he tweeted on April 11, referring to a story about the studies in the The New York Times’ science section.

The findings also highlight the difficulties governments face in tracing the source of coronavirus outbreaks.

Less-developed countries may never know where their strains came from due to inadequate testing and sequencing capability.

India, for example, has released the genetic sequence of fewer than 40 samples to the public so far, a small number considering its huge population.

Most of the strains sampled in 35 early cases came from clades that could be traced to Italy and Iran, with only a few from China, according to a recent study. But researchers were not able to track further because of the lack of data.

A scientist on the study, Dr Mukesh Thakur, of the Zoological Survey of India, said it was too early to rule out China as the source of outbreaks in India because the number of samples at hand was limited.

A 20-year-old student studying medicine in Wuhan, for instance, might have come in contact with many people on the way home before she was tested positive on January 30.

Thakur said local media reported that the Indian government quarantined 3,500 people possibly linked to three positive cases imported from Wuhan.

“God knows how many of them tested positive in the subsequent stages,” Thakur said in an email response to the Post’s queries on Tuesday.

Some prominent scientists, including Francis Collins, director of the US National Institutes of Health, said the virus might have been spreading quietly in humans for years, or even decades, without causing a detectable outbreak.

The virus had thus adapted well to the human body. Some genes regulating its binding to host cells were similar, or even identical, to those found in some other highly infectious human viruses, such as HIV and Ebola.

According to some estimates, the ancestor of Sars-CoV-2, the virus causing Covid-19, might have left bats between 50 and 70 years ago. A recent study by a team of geneticists in Oxford University estimated the first outbreak of the current pandemic could have occurred as early as September last year.

They found that the dominant strains circulating in China and Asia were genetically younger than some popular strains in the United States.

Source: SCMP

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