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 4:54 PM

Relaxed Immigration: The key to rejuvenate aging workforce of Japan

Late in 2018, a bill was passed in Japan to widen the entry of immigrant workers. The bill was to mitigate severe shortage of labor amidst an aging population and falling birth-rates. Prime Minister Shinzo Abe described the bill as a much-needed reform to ensure the smooth functioning of Japanese  economy. The bill makes it easier for immigrants to work for longer duration in Japan.

More than 20% of Japan’s population is over 65 years old which is the highest proportion in the world. It is projected that by 2030, one in every three people will be above 65 years or older and one in every five will be 75 years or older.

The fertility rate has fallen to 1.4 children per woman in Japan which has been attributed to a host of factors including changing lifestyles, people marrying late, not marrying at all, and the economic insecurity of the younger generation. It is projected that by 2050, Japan’s population will decline by twenty million while the world population is expected to increase by two billion.

Japan has traditionally been quite homogenous with  very little diversity to show. This trend now appears to be changing as today nearly three million migrants live in Japan which is three times more than the figures of 1990. As the country struggles with a rapidly aging population and severely declining domestic labor, the number in all likelihood is only going to increase.

Conservative Prime Minister Shinzo Abe based his support for the reforms in immigration policy on demographic arguments.The conservative section of the parliament has been a staunch supporter but the left opposition has been critical of the bill citing concerns about a lack of regulation on the employers which could lead to over-exploitation of the workers. Prime Minister Shinzo Abe’s government promised to set up a hundred consultation centers nationwide for dealing with issues related to workplace abuse specifically for the migrant workers.

However, that’s as far as those resisting the bill have gone. Nationalist and xenophobic voices protesting the bill have failed to gather steam. In fact, according to a survey by Nikkei in January 2020, almost 70 percent of Japanese said it is “good” to see more foreigners in the country.

Japan’s aging population has made it difficult to find the workers and some companies have more than 120 job openings for every 100 job seekers nationwide. Quite evidently, immigration now appears to be the most feasible solution for Japan- a country that has traditionally been restrictive with its borders when it comes to ethnic diversity.

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