Wednesday, July 1, 2020

World's largest graveyard of Dinosaurs found in South Africa

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Nikhita Gautam

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World's largest graveyard of Dinosaurs found in South Africa

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Global Views 360

Publication Date

July 1, 2020

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‘African dinosaurs’ exhibit at the Iziko South African Museum in Cape Town

‘African dinosaurs’ exhibit at the Iziko South African Museum in Cape Town | Source: Bruce Anderson via Wikimedia

In a village in the eastern cape of South Africa lies one of the most significant dinosaur sites ever found in the world. The site was discovered when a shepherd, Dumangwe Thyobeka found a large bone on his way to his great-grandparents’ graves, in 2015. He then took the bones to a local dinosaur enthusiast, James Rhalene. Commenting on this discovery " Mr. Rhalene said, "Growing up we were told dinosaurs were a myth, I thought they were only tales our grandparents would tell around the fire at story time", and It wasn't until reading some books that I started to believe they may be real. I've been looking into the existence of dinosaurs since 1982. He added, "You can imagine my excitement at being part of this and discovering them in my own backyard. I am so proud. Books will be written about our small village; the world will come to know of us through this discovery.”

These bones are more than 200 million years old, of around the end of the Triassic era and the beginning of the Jurassic one. When the village elder, Sginyane Ralane came to know about the discovery, he reached out to universities in South Africa for looking into it. The news eventually reached Prof. Jonah Choiniere from the University of Witwatersrand in Johannesburg, and in 2018 Jonah and his colleagues started excavating the site. “It has been one of those places where you sometimes find yourself literally tripping over a dinosaur bone. There are very few other sites I've had the chance to work where we have this richness of fossils.” says Prof Paul Barett, a dinosaur expert at The Natural History Museum, UK, after he joined the team.

A reason why this area is abundant in fossils, Natural History Museum explains, is because of the ancient river systems in the area. The area is arid for most of the year now, and the rivers flow only seasonally. However, in the ancient times, there were vast river systems flowing year-round in the region, with wide, shallow rivers which would consequently form a layer of rock 210 million years old which is up to 500 meters thick in some regions. These rivers supported diverse wildlife, including ancestors of crocodiles, possibly those of turtles and mammals and fish, amphibians and reptile-like animals. The existence of such large rivers meant that dead animals nearby would be buried in sediment before they decomposed.  

This discovery is scientifically important for a number of reasons; the era from which these bones are found is a boundary in which a mass extinction occurred. Prof. Jonah is trying to understand how the animals from before that extinction survived and how they flourished after. In the Triassic era, there were multiple dominating animals, like the crocodiles, big mammal-like animals and dinosaurs. In the Jurassic era, however, the dinosaurs are clearly dominating. Why this happened is unclear, and the rocks and fossils from this site might help with that. There were also other animals along with dinosaurs in this site which make it noteworthy. Of the animals found, there were rauisuchians, which relate to modern-day crocodiles, and were dominant on land during the Triassic. The team also found cyclodonts and dicyclodonts, where the cyclodonts are the early ancestors to all mammals, and dicyclodonts are an even earlier branch of the mammalian family tree.

All of these have a significant impact on the community too; the team signed a memorandum of understanding with the local government with huge. After the signing, local officials visited the site at Qhemega. The team has been trying to use the heavy machinery they had brought for moving fossils for improving access in and to the village. They are also developing a curriculum in high schools to include topics about fossil sites and to add geography to the curriculum, to train the younger generation about the mapping used in excavation and in many other scientific fields especially relevant in the mineral-resource rich South Africa.

So far, this site has only provided benefits for everyone involved; new discoveries and confirming data for the scientific community, and economic access, increased opportunities and a matter for pride for the local community.

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February 4, 2021 5:10 PM

Why the people are protesting in Hong Kong

Hong Kong is a special administrative region of the People’s Republic of China located on the Eastern Pearl River Delta of the South China Sea. From 1842 to 1997, the region was under the control of the Britishers.

In 1997 the  sovereignty of Hong Kong was transferred to China with the principle of “one country, two systems” which provided some degree of autonomy for Hong Kong. This system was supposed to be in force for a period of minimum fifty years from 1997 to 2047. However, under President Xi Jinping, China has been aggressively making such rules and regulations which increase the influence of mainland China on administration of Hong Kong.

In June 2020, China started implementing a new national security law for which potentially severely limits the independence of the judiciary of Hong Kong. Under the proposed law, Hong Kong’s Chief Executive, who is answerable to Beijing, gets the power to appoint judges for specific security cases. It also calls for setting up a security agency in Hong Kong to resolve existing conflicts and challenges faced by Beijing with respect to Hong Kong.

China defended the law by citing that it would prevent and punish secession, subversion as well as foreign infiltration. Beijing has argued that these three factors are responsible for fuelling unrest in the city since last year. Critics however have very different opinions regarding the law. For them this law directly attacks the relative autonomy granted to Hong Kong after Britain handed it back to China in 1997.

The law can potentially be employed to target anti-government protests and other forms of dissent in the region of Hong Kong. It has instilled fear in the minds of the Hong Kong residents that the Chinese Communist Party is trying to curb the freedom of speech and protest in the region in an effort to bring Hong Kong under its authoritarian rule.

Many protesters are of the belief that the local governments of Hong Kong are no longer autonomous and act on the whims of Beijing. They accuse the city's top leader, Chief Executive Carrie Lam, who is appointed by Beijing, of acting only in the interest of mainland China while ignoring to safeguard the autonomy of Hong Kong.

The protests Hong Kong witnessed in May 2020, were quite similar to the ones the city witnessed almost a year ago when China proposed an extradition law for Hong Kong. The law was eventually scrapped after a flurry of protests. However the protest against the territory’s existing leadership turned into a protest against Chinese ruling party’s efforts to merge Hong Kong with mainland China.

At its core, the protest movement is aimed at protecting Hong Kong’s autonomy and resisting encroachment from the mainland. However, China’s adamant approach in bringing Hong Kong under the mainland amidst a falling economy and rising agitation and police brutality has had a negative impact on the residents.

Many Hong Kong protesters have started moving to countries who are willing to adopt them over fears of being under scrutiny from the Chinese government. Many of the skilled workers are now looking at ways to exit the city and move to better alternatives. More than half of the people from the age group of 18 to 24 are considering options outside of Hong Kong owing to the uncertainty surrounding the region’s fate.

Despite the protest by citizens and condemnation and actions by the US, Britain and other Western countries, it seems unlikely that China is going to halt its efforts to dismantle the autonomy of Hong Kong and effectively merge it with the mainland China.

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