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 4:42 PM

COVID-19 in Iran: Fighting pandemic while facing US sanctions

After backing out of the nuclear deal with Iran in 2018, the United States had toughened the sanctions on petrochemical trade and other vital sectors of Iranian economy. The Iranian government is claiming that those sanctions are heavily affecting their ability to act against COVID-19.

These sanctions forced the Iranian government to significantly change infocus from curbing the spread of infections to stabilizing the economy.  There have been some restrictions but no lockdown imposed on the movement of people as the lockdown would further weaken the economy. Also, a lot of pharmaceutical companies aren’t willing to trade with Iran because of the fear of getting caught up in secondary sanctions, even though the US governments deny any restriction of the same. 

All of this has led to a global outcry against the sanctions. The United Kingdom is pushing the US to ease the sanctions because they believe that the hospitals in Iran are badly overstretched. The UK tried to provide direct support to the country via WHO, but Iran refused any help that didn't come with the lifting of the sanctions. The United Nations High Commissioner for Human rights, Michelle Bachelet, has urged the global community to rethink the existing sanctions on countries like Iran in the light of the current pandemic. The United States also offered humanitarian assistance to the state but was rejected by the Supreme Leader Khamanei, who declared the US as being charlatans and liars, and said that a wise man should not accept medicines from a country alleged of creating the virus. Russia, China and some other medical and rights groups have been urging the Trump administration to lift the sanctions. Over 21,000 lawyers and legal experts in Iran have signed a statement declaring that the US sanctions on Iran are anti-human. On the 26th of March, the US imposed even more sanctions, on more than 17 entities. The sanctions were announced a day after the family of a retired FBI agent claimed that the agent had died while in custody in Iran; two days after Ms. Bachelet made her statement on rethinking sanctions.

The crisis has touched most corners of the country, but it is most severely impacting the poor and working class. While it is older men who are dying in the highest numbers, the economic impact especially hurts women, who are most liable to lose work, and shoulder increased duties, looking after sick relatives and children staying home from school. Iranians’ purchasing power has plummeted in the past two years, as the mismanaged economy shuddered through Donald Trump’s withdrawal from the nuclear deal and the re-imposition of US sanctions. As Nahid, a women’s rights activist put it: “When people met this virus, their nutrition was already poorer, their immune systems were weakened, and many were already unable to afford health care.” Charities and private sector groups are joining together to raise funds for importing equipment and other medical supplies from China to set up facilities of COVID-19. However due to the sanctions it is becoming difficult to move money from Iran to any other country.

Arshi Tirkey, a Junior Fellow with Observer Research Foundation has put quite aptly: “It is true that political instability, corruption and economic mismanagement in Tehran have aggravated the issue; and likewise, this calls for governance reforms and financial transparency initiatives in Iran. But this is not the sole reason for the scarcity of medical equipment and the condition of health infrastructure in the country today. Sanctions remain a central impediment to improving Iran’s capacity to respond to the pandemic.”

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