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 4:46 PM

Electoral Processes in the US: Electing the President

The USA electoral process is a complex one; caucuses and primaries, followed by national conventions, general elections, formation of the electoral college and the selection of the president. Each step of this process has a lot of subtleties, which vary widely from state to state.

Caucuses and Primaries: This is the initial step of the selection of president. This stage of choosing occurs within a political party, where the party picks the candidate to rally behind.

In the state “Primary”', the registered members of political parties cast votes to allocate delegates for the presidential nominees of their parties. In some of the states this is done through caucuses, where groups are formed behind various potential candidates and there is discussion and persuasion between various groups. Republican party allocates all the delegates directly through primary or caucus, however the Democratic party allocates some Super-Delegates over and above the directly elected ones. These selected or allocated delegates are sent to the national party convention to represent their nominees.

In the process occurring between the primaries and caucuses to the selection of the potential electors is decided entirely by the party. The democrats, after the 1968 democratic convention, made a formal mechanism to reduce power of party leaders over the selection process and ways to represent minorities in the electors. This, however, backfired for the party as the delegates selected by primaries voted according to candidates and not the party, which led to the 1972 democratic Presidential candidate to win in only one state. The rules were then reformed and the concept of Super-Delegates was introduced. The Republican party also followed a somewhat similar trajectory, but did not impose as many restrictions on the delegate selection process, and never took measures to include the minorities.

National Conventions: Each parties’ delegates then choose a final presidential nominee at a national party convention. The nominee picks another person, who would be the vice president in the case the nominee wins. Here, there can be pledged or unpledged delegates; pledged ones are bound to support the potential candidates they chose in the previous round, while the unbound, or superdelegates can support anyone they choose.

Electoral College: After each of the parties have selected their presidential candidate, the candidate campaigns across the country to gain favor from the general public. There are speeches, rallies, debates, and other outreach activities, in which the candidates promote themselves. Meanwhile, the parties select some respective potential electors in each state, which are the people who get the last vote in the selection of the president. Each party forms a slate of potential electors according to the state..

General Election:After this, the general election occurs, in which the public votes for a president. However, the public does not directly vote for the president; they vote for the slate of electors for that political party for that state.

After the general election, the Electors are appointed to the state in two ways.. Electors from all the states then form the electoral college, which is the body that votes for the president. The electors are not legally bound to vote for the party they are pledged to, but can be fined or disqualified if they defect. Throughout USA history, though, more than 99% of the electors have voted as pledged.

The electoral college presently has 538 electors and the candidate who wins 270 or more electoral votes, wins the Presidential election.

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