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26 April 2018 Photo Supplied
Pretzel-formed fossil of great evolutionary interest
Slab with holotype of Parapsammichnites pretzelifornic from the Urusis Formation, Namibia. Scale bar is 1cm.Picture was taken from Buatois et al., 2018.
The acclaimed scientific journal, Nature, recently published an article about a trace fossil in approximately 543-million-year-old rocks, which elucidates the evolution of the first animals that appeared on Earth and lived in the sea.  

Affiliated Professor in the Department of Geology at the University of the Free State (UFS) Prof Gerard Germs formed part of a team that conducted research with the aim of understanding how the evolution of the first multicellular animals came about and how the Cambrian explosion took place. Prof Germs is of great value to the team for his extended field geological knowledge.

An article which he co-authored was published in the Nature Scientific Reports. The title of the article is: “Sediment disturbance by Ediacaran bulldozers and the roots of the Cambrian explosion”. The international group of writers included authors from Canada, Spain and South Africa. 

Occurrence of the Cambrian explosion
Prof Germs explains the Cambrian explosion: “During the long (4.5-billion-year) history of the Earth, the first life originated and subsequently evolution of plants and animals took place from one-cellular organisms to multicellular vertebrate animals and seed plants. Approximately 573 million years ago the first multicellular animals appeared on the scene. Sometime afterwards, approximately 540 million years ago, a kind of explosion in the origin of many new animal species occurred. This explosion is known as the Cambrian explosion.”

The team studied Earth sediments which are somewhat older than the Cambrian explosion. Such sediments are approximately 573 to 541 million years old and form part of the Ediacaran (late Neoproterozoic) period.

“My discoveries of the past, of among others, the oldest animal with a carbonate skeleton (Cloudina) and of complex horizontal Cambrian-type “worm” tracks (treptichnids) in Ediacaran sediments of Namibia have demonstrated that the Cambrian explosion occurred more gradually than previously thought. This has recently been confirmed in the article that was published in the Nature Scientific Reports.”

Pretzeliformis bulldoze to search for food
According to the article there is evidence that   during the Ediacaran period   worm-like animals such as the Parasammichnites pretzeliformis were already so far developed that they, due to coelom development and size increase, for the first time in the history of the Earth, were able to disturb and bulldoze sediments.  In this way they were able to find a new food source in sea sediments. Bulldozing animals were previously thought to have originated only during and after the Cambrian explosion and not during the older Ediacaran.

“Another major aim of my cooperative research is to improve our knowledge of the geology of the Ediacaran to early Cambrian of South Africa and Namibia. We also intend to establish how the assembly of the supercontinent Gondwana took place. This improved knowledge can be of great future economic interest since large oil, gas and limestone sources occur in Ediacaran-age sediments outside South Africa”.

News Archive

#Women’sMonth: Who am I? Questions of identity among Rwandan rape survivors
2017-08-03

 Description: Michelle Nöthling, Questions of identity among Rwandan rape survivors Tags: Michelle Nöthling, Questions of identity among Rwandan rape survivors 

Michelle Nöthling, master’s degree student
in the Centre for Trauma, Forgiveness, and
Reconciliation Studies at the UFS.
Photo: Eugene Seegers

From 7 April to 15 July 1994, a mass genocide swept through Rwanda after years of Belgian colonial rule that divided the country along ethnic lines. Rape was also used as part of a political strategy to torture and humiliate mainly Tutsi women, and as a means of spreading HIV.

Individual focus
Why is it important to listen to what these rape survivors have to say? Michelle Nöthling, a master’s student in the UFS Centre for Trauma, Forgiveness, and Reconciliation Studies, responds, “We speak of groups – refugees, foreigners, and the like – yet we tend to forget the individuals and the lasting impact trauma has had on each person.”

Narrative exploration
Michelle maintains that we are the product of the narratives around us; things like – how to be a woman, how to dress, speak, or treat others. Her research delves into how these rape survivors see themselves, how they narrate their lives. She also investigates power relations based on gender; for example, how language can be used as a divisive tool.

Rwandan backdrop
In Rwanda, gender roles are deeply entrenched. Traditionally, a ‘girl’ remains such while she is a virgin. Her transition into womanhood is usually marked by marriage and followed by motherhood. But rape disrupts this structure, leading to an identity crisis as these girls are catapulted into motherhood with an unplanned child resulting from a traumatic event.

“We are the product of
the narratives around us.”

Reaching their mid-teens, the children, too, started asking questions about identity or paternity. For those mothers who were finally able to open up to their children, the experience has been mostly liberating – often leading to a closer relationship between parent and child. Michelle intends to interrogate how such significant moments shape the way these women perceive themselves. Research tends to portray these survivors solely as mothers of rape-born children. Michelle, however, seeks to examine their identities more deeply.

“These survivors still bear the heavy burden of being marginalised, stigmatised, and severely humiliated. Despite this, they have developed their own communities of belonging; people with whom they connect, to whom they relate, and to whom they are not ashamed to tell their experiences,” she said.

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