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Showing results for tags 'archean'.
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RNA Can Form Spontaneously on Basaltic Glass
Oxytropidoceras posted a topic in Fossil NewsScientists announce a breakthrough in determining life's origin on Earth—and maybe Mars Foundation for Applied Molecular Evolution, June 3, 2022 The open access paper is: Craig A. Jerome, Hyo-Joong Kim, Stephen J. Mojzsis, Steven A. Benner, and Elisa Biondi. Catalytic Synthesis of Polyribonucleic Acid on Prebiotic Rock Glasses Astrobiology. ahead of print http://doi.org/10.1089/ast.2022.0027 Yours, Paul H.
Some of Greenland’s Archean rubies possible linked to early life
Oxytropidoceras posted a topic in Fossil NewsSome of the world’s oldest rubies linked to early life Carbon residue that was once ancient life found encased in a 2.5 billion-year-old ruby, University of Waterloo Ancient Traces of Life Discovered Encased in a 2.5 Billion-Year-Old Ruby SciTechDaily, October 24, 2021 2.5 billion-year-old traces of life locked inside primeval ruby "The graphite inside this ruby is really unique." By Yasemin Saplakoglu , October 24, 2021 The paper is: Yakymchuk, C., van Hinsberg, V., Kirkland, C.L., Szilas, K., Kinney, C., Kendrick,
Ancient Planet CGI Documentary
3depix posted a topic in Paleo Re-creations3D documentary I have been working on for the last 3 years is finally released! It is called Ancient Planet and tells the the story of Earth from the its formation in the Hadean Eon, until the end of the Proterozoic with its mysterious Ediacaran organisms. All 3 episodes are available for watching on Tubi service, which is completely free, just requires registration: https://tubitv.com/series/300007201/ancient-planet-trilogy?start=true
Oldest known archaea microbes? (Barberton greenstone belt, South Africa)
Oxytropidoceras posted a topic in Fossil News3.42-billion-year-old fossil threads may be the oldest known archaea microbes. The structure and chemistry of the filaments hints that they may be ancient cells. By Carolyn Wilke, Science News, July 26, 2021 Cavalazzi, B., Lemelle, L., Simionovici, A., Cady, S.L., Russell, M.J., Bailo, E., Canteri, R., Enrico, E., Manceau, A., Maris, A. and Salomé, M., 2021. Cellular remains in a~ 3.42-billion-year-old subseafloor hydrothermal environment. Science Advances, 7(29), p.eabf3963. Yours, Paul H.
Strelley Pool Stromatolite
ThePhysicist posted a gallery image in Members Gallery
From the album: MiscellaneousA section of a stromatolite from the Strelley Pool Chert, Western Australia. Currently, these stromatolites are among, if not the oldest known fossils. There is possibly earlier evidence of life in the form of biogenic carbon, but this chert produces the oldest known mineralized preservation of organisms. Of course everyone wants to find the "earliest life," and it becomes difficult to differentiate between microorganisms and geologic structures in rocks so old, so there will always be disagreement and competition. Likely, there are older fossils already found or yet to be, but it requires a l
Life on Earth Before Oxygen in the Archean
Oxytropidoceras posted a topic in Fossil NewsWe may Finally know what life on Earth breathed before there was oxygen By Carly Cassella, ScienceAlert The open access paper is: Visscher, Pieter T., Kimberley L. Gallagher, Anthony Bouton, Maria E. Farias, Daniel Kurth, Maria Sancho-Tomás, Pascal Philippot et al. "Modern arsenotrophic microbial mats provide an analogue for life in the anoxic Archean." Communications Earth & Environment 1, no. 1 (2020): 1-10. Yours, Paul H.
Oxytropidoceras posted a topic in Fossil NewsA great lecture and lengthy lecture about Archean paleoenvironments, tectonics, geology, and some paleontology is: Archean Surface Conditions Ideas in Science By Christoph Heubeck - RED18 Published on Mar 12, 2018 http://astrobiovideo.com/en/video/175 https://www.youtube.com/watch?v=yNEkQ8KV-aQ It begins: "Here is the the principal take-home take-home message. All right. We know very little about the early Earth and and therefore it's such an interesting thing to talk about. We do know a bit right. We k
Earth's oldest rock was found on the moon ??
Oxytropidoceras posted a topic in Fossil NewsEarth's oldest rock was found by Apollo 14 astronauts -- on the moon. Ashley Strickland, CNN, January 24, 2019 https://www.cnn.com/2019/01/24/world/earth-oldest-rock-moon/index.html We May Have Found Earth's Oldest Known Rock. It Was on The Moon. Michelle Starr, January 25, 2019 https://www.sciencealert.com/earth-s-oldest-rock-may-have-been-found-it-was-um-on-the-moon The paper is: J.J. Bellucci, A.A. Nemchin, M. Grange, K.L. Robinson, G. Collinse, M.J. Whitehouse, J.F. Snape, M.D.Norman D.A.Krin Terrestrial-like zircon in a cla
Archean Paleosols on Earth and Mars - Online PDF File
Oxytropidoceras posted a topic in Fossil NewsBelow is a fascinating dissertation about the Archean. Archean Paleosols on Earth and Mars Dissertation zur Erlangung des Doktorgrades der Naturwissenschaften des Fachbereichs für Geowissenschaften der Freien Universität Berlin vorgelegt von Sami Nabhan PDF file at https://refubium.fu-berlin.de/handle/fub188/13122 Yours, Paul H.
"World's Oldest Fossils" (Stromatolites, Greenland) Might Actually Be Simple Rocks
Oxytropidoceras posted a topic in Fossil NewsGeologists Question 'Evidence Of Ancient Life' In 3.7 Billion-Year-Old Rocks, NPR, All Things Considered https://www.npr.org/2018/10/17/658103489/geologists-question-evidence-of-ancient-life-in-3-7-billion-year-old-rocks "World's Oldest Fossils" Might Actually Be Simple Rocks, And We're Here For The Drama, Carly Cassella, Science Alert https://www.sciencealert.com/doubt-raised-over-current-record-holder-oldest-fossil-sign-of-life The paper is: Abigail C. Allwood, Minik T. Rosing, David T. Flannery, Joel A. Hurowitz and Christopher
Possible Prebiotic Simple Protein Catalyst Identified
Oxytropidoceras posted a topic in Fossil NewsScientists identify protein that may have existed when life began The primordial peptide may have appeared 4 billion years ago Rutgers University, August 30, 2018 https://www.sciencedaily.com/releases/2018/08/180830180101.htm “The Primordial Protein” Could have Emerged Spontaneously on Earth–Scientists Close in on How Life Began, Daily Galaxy https://dailygalaxy.com/2018/08/the-primordial-protein-could-have-emerged-spontaneously-on-earth-scientists-close-in-on-how-life-began/ J. Dongun Kim, Douglas H. Pike, Alexei M. Tyryshkin, G. V. T. S
Oldest evidence of life on Earth found in 3.9 Ga Canadian rocks
Oxytropidoceras posted a topic in Fossil NewsOldest evidence of life on Earth found in Canadian rocks 3.95-billion-year-old Labrador rocks contain graphite that appears to come from living organisms Emily Chung, CBC News, September 28, 2017 http://www.cbc.ca/beta/news/technology/oldest-earliest-life-labrador-1.2503953 Oldest signs of life on Earth may be in 3.95 billion-year-old rocks By Sarah Kaplan, Washington Post, September 28 https://www.washingtonpost.com/news/speaking-of-science/wp/2017/09/28/oldest-signs-of-life-on-earth-may-be-in-3-95-billion-year-old-rocks/ Found: Oldest Evi
Archean Plankton (?), Barberton Mountain Land, Southern Africa
Oxytropidoceras posted a topic in Fossil NewsAncient Plankton-Like Microfossils Span 2 Continents by Pennsylvania State, July 14, 2017 https://phys.org/news/2017-07-ancient-plankton-like-microfossils-span-continents.html https://www.sciencedaily.com/releases/2017/07/170713154830.htm http://www.sciencenewsline.com/news/2017071401120041.html Oehler, D.Z., Walsh, M.M., Sugitani, K., Liu, M.C. and House, C.H., 2017. Large and robust lenticular microorganisms on the young Earth. Precambrian Research, 296, pp.112-119. http://www.sciencedirect.com/science/article/pii/S0301926816305277