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2.5 billion-year-old Fossils in the Northern Cape Province of South Africa Show Life Existed without Oxygen

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Representational image. Pixabay

December 1, 2016: Researchers have discovered fossils of 2.5 billion-year-old sulfur-oxidising bacteria that existed just fine without any oxygen.

The ancient life forms were found fossilised in two separate locations in the Northern Cape Province of South Africa.

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“These are the oldest reported fossil sulfur bacteria to date,” said Andrew Czaja, Assistant Professor of Geology at University of Cincinnati in the US.

“And this discovery is helping us reveal a diversity of life and ecosystems that existed just prior to the Great Oxidation Event, a time of major atmospheric evolution,” Czaja noted.

These bacteria were thriving just before the era when other shallow water bacteria began creating more and more oxygen as a by-product of photosynthesis.

“We refer to this period as the Great Oxidation Event that took place 2.4 to 2.2 billion years ago,” Czaja said.

The 2.52 billion-year-old sulfur-oxidising bacteria are described by Czaja as exceptionally large, spherical-shaped, smooth-walled microscopic structures much larger than most modern bacteria.

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In the study published in journal Geology, Czaja and his colleagues revealed samples of bacteria that were abundant in deep water areas of the ocean in a geologic time known as the Neoarchean Eon (2.8 to 2.5 billion years ago).

“These fossils represent the oldest known organisms that lived in a very dark, deep water environment,” Czaja said.

“We discovered these microfossils preserved in a layer of hard silica-rich rock called chert located within the Kaapvaal craton of South Africa,” Czaja noted.

With an atmosphere of much less than one percent oxygen, scientists have presumed that there were things living in deep water in the mud that did not need sunlight or oxygen, but experts did not have any direct evidence for them until now, Czaja said.

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“These early bacteria likely consumed the molecules dissolved from sulfur-rich minerals that came from land rocks that had eroded and washed out to sea, or from the volcanic remains on the ocean’s floor,” he added.(IANS)

Next Story

Widespread Stigma in South Africa, Despite Liberal Abortion Laws

At the clinic in Rustenburg, nurse Christa Tsomele has been performing abortions for a decade, and says she is proud of her work. She says she thinks some of her colleagues are contributing to the stigma of abortion -- and worse.

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South Africa
Nurse Margorie Sithole, left, explains to Martina Mabe, center, and Flora Tshabalala, right, that abortion proceedures will only be performed during the week at Baragwanath Hospital in Johannesburg, Feb. 1, 1997. VOA

Twenty-six-year-old Precious, as she has asked us to call her to protect her identity, is 16 weeks pregnant. And so is her best friend, also by Precious’ boyfriend. That event turned her life upside down and brought her to the difficult decision to seek an abortion.

She lives in South Africa, where abortion is legal without justification and available through a nurse through 12 weeks of pregnancy, and legal up to 20 weeks, when done by a doctor and with justification.

But when she tried to get an abortion in her home city of Johannesburg, she ran into problems.

“When I went to register my name, I simply said, ‘I want to do abortion,’ and then they said, ‘No,’” she told VOA.

“And there were two nurses there, and the older one said, ‘Oh, thank God, I’m not trained for this,’ whilst the other one said, ‘no, you have to do back to your place and do it there.’ Then we had a disagreement there, as, like, I’m being against God and more stuff like that.”

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The company recently launched a campaign to try to reduce the stigma around abortion care. Pixabay

Hers is a common experience, and it’s what reproductive health advocates say drives 10,000 South African women to seek illegal, backstreet abortions every year.

The nation’s health department estimated that as many as 25 percent of maternal deaths from septic miscarriages were the result of such illegal abortions. More than half of all abortions in South Africa are unlicensed, despite the fact that half of all government hospitals offer the service for free.

Precious, who says she fears being judged by her neighbors, chose instead to travel to the dusty mining town of Rustenburg, where aid agency Doctors Without Borders has set up a free abortion clinic.

She said she was sure of her decision.

“I want this thing to be done as quickly as — because I can’t, I can’t take it anymore,” she said, her voice soft and wavering. “Because what I’m thinking is what happened. I can’t think of, like, of positive things. I think, if this thing failed, then what will I do? Should I end my life?”

‘We give women a choice’

Whitney Chinogwenya, head of marketing at South Africa’s best-known private abortion provider, Marie Stopes, says their clinics address a real need. The company recently launched a campaign to try to reduce the stigma around abortion care.

“When a woman wants to terminate a pregnancy, they’re going to terminate the pregnancy,” Chinogwenya told VOA from the organization’s office in downtown Johannesburg. “It doesn’t matter what methods they use, it doesn’t matter whether it’s legal, it’s illegal or it’s safe — they’re going to find a way to terminate the pregnancy.

“So what’s so great about South Africa and it being legal here is that there’s a safe place where you can get the procedure, where it’s not going to harm your body, where it’s not going to cause serious complications. And the most important thing is that we give women a choice.”

Another problem, she said, is that few women know that abortion is legal, and think backstreet providers — who advertise openly, but who are not licensed — are their only option.

Medical experts told VOA harrowing tales of the practices performed by such providers. Many don’t perform ultrasounds, don’t attempt to determine how far along the pregnancy is, don’t follow up after the procedure, give the wrong medication, give incorrect medical advice, or administer dangerous chemicals such as bleach and drain cleaner to desperate patients.

One particularly egregious provider, Chinogwenya told VOA, even tried to sexually assault a woman in his care.

‘Somebody has to do it’

Nurse Kgaladi Mphahlele, who heads the Doctors Without Borders project in Rustenburg, says demand for the clinic’s services is high. He estimates he performs as many as 100 first-trimester abortions each month, and says he sees women from as far away as Botswana, where abortion is illegal.

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South Africa, where abortion is legal without justification and available through a nurse through 12 weeks of pregnancy, and legal up to 20 weeks, when done by a doctor and with justification. VOA

His patients, he said, range in age from teenagers to 50-year-olds. He began his career delivering babies, but switched course, and says he’s proud of his decision.

“I look back, ‘why did I get myself into this profession?’” he said, adding that his friends and family were initially worried, but have since become supportive of his choice.

“I said, ‘I want to be a health care provider because I want to help the people.’ And then, you see a gap, and this is part of health care service, and if no one is doing it, somebody has to do it. And I enjoy doing it, and I enjoy working with people.”

At the clinic in Rustenburg, nurse Christa Tsomele has been performing abortions for a decade, and says she is proud of her work. She says she thinks some of her colleagues are contributing to the stigma of abortion — and worse.

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“If you can’t help a patient as a nurse, just refer the client to the relevant place so that the patient must get help,” she said. “Don’t just tell her, ‘no, I can’t do that, or ‘I can’t help you,’ and leave the patient stranded. That is why they end up going to the bogus [provider]. Because when you leave her stranded, now she decides to go out to the street, that is where she is going to die.”

It’s that, she says, that keeps her going, through the judgment, through the tears, through the difficult stories she hears day in and day out. Because, she says, whether people agree with her work or not, she’s saving women’s lives, and following the law. (VOA)