. | . |
New fossil could represent world's oldest fungus by Brooks Hays Washington (UPI) Apr 25, 2017
Researchers have discovered fungus-like fossils in rocks estimated to be 2.4 billion years old. The fossils could represent the world's oldest fungus -- 2 billion years older than the next-oldest fungus specimen. If confirmed, the discovery could force scientists to rethink the timing of early evolution on Earth. The fossil patterns were discovered in rock samples recovered from basaltic rock in South Africa. The rocks were formed by lava flowing beneath the sea bed. "The deep biosphere -- where the fossils were found -- represents a significant portion of the Earth, but we know very little about its biology and even less about its evolutionary history," lead researcher Stefan Bengtson, of the Swedish Museum of Natural History, told BBC News. The newly discovered fossils look like tangled thread and resemble younger fungi fossils found on dry land. Cavities in the ancient rocks suggest the lava from which they were formed was once a conduit for escaping gas bubbles -- bubbles that might have sustained early life forms. "Fungi in this environment most probably lived in symbiosis with microbes utilising chemically stored energy for their metabolism," Bengtson said. "They may not even have needed free oxygen." Bengtson and his colleagues detailed their discovery in the journal Nature Ecology and Evolution. As expected, at least a few scientists are dubious of the discovery, which challenges a number of assumptions about the emergence of early life on Earth. "[The discovery], if accurate, would be surprising as it would significantly precede fossil evidence and molecular clock analysis for the origin of eukaryotes, much less the origin of fungi," Andrew H. Knoll, a professor of natural history at Harvard University, told Seeker. Bengtson acknowledges that the fossils could represent a simpler life form -- an extinct eukaryote lineage or giant prokaryote. "This is why we call the fossils 'fungus-like' rather than 'fungal,'" Bengtson said. "We have been careful to point out that the filaments we see are very simple."
Kiel, Germany (SPX) Apr 24, 2017 At a first glance, the Witwatersrand basin, the largest known gold resource on our planet, is not automatically related to ocean research. However, in its 3 billion years old geological history, the Witwatersrand basin in South Africa has been covered by seawater, but experienced also episodes of drying out, flooding and erosion by rivers and the repeated coverage by seawater. In 1852, the ... read more Related Links Explore The Early Earth at TerraDaily.com
|
|
The content herein, unless otherwise known to be public domain, are Copyright 1995-2024 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. General Data Protection Regulation (GDPR) Statement Our advertisers use various cookies and the like to deliver the best ad banner available at one time. All network advertising suppliers have GDPR policies (Legitimate Interest) that conform with EU regulations for data collection. By using our websites you consent to cookie based advertising. If you do not agree with this then you must stop using the websites from May 25, 2018. Privacy Statement. Additional information can be found here at About Us. |