Evidence map›Paper›PMID 34261651›Full record

ArticleScience advances2021

Cellular remains in a ~3.42-billion-year-old subseafloor hydrothermal environment.

Barbara Cavalazzi, Laurence Lemelle, Alexandre Simionovici, Sherry L Cady, Michael J Russell, Elena Bailo, Roberto Canteri, Emanuele Enrico, Alain Manceau, Assimo Maris and 5 more

Abstract read
In one paragraph

Article in Science advances, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

21 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. The role of theFrontiers in microbiology · 2026
    Review
  5. Organic geochemical evidence for life in Archean rocks identified by pyrolysis-GC-MS and supervised machine learning.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  6. What the earliest evidence for life tells us about the early evolution of the biosphere.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Review
  7. Article
  8. Article
  9. Review
  10. Review
  11. Article
  12. Review
  13. Review
  14. Article
  15. Astrobiology · 2022
    Article
  16. Biogeochemical fingerprinting of magnetotactic bacterial magnetite.Proceedings of the National Academy of Sciences of the United States of America · 2022
    Article
  17. Review
  18. Article
  19. The darkest microbiome-a post-human biosphere.Microbial biotechnology · 2022
    Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

15 authors.

Barbara CavalazziDipartimento di Scienze Biologiche, Geologiche e Ambientali, Università di Bologna, Bologna, Italy. barbara.cavalazzi@unibo.it.ORCID http://orcid.org/0000-0002-5135-9529
Laurence LemelleLGL-TPE, ENS de Lyon, Université de Lyon, CNRS, Lyon, France.ORCID http://orcid.org/0000-0002-7082-5564
Alexandre SimionoviciISTerre, University of Grenoble-Alpes, CNRS, Grenoble, France.ORCID http://orcid.org/0000-0001-5349-6482
Sherry L CadyPacific Northwest National Laboratory, EMSL, Richland, WA, USA.ORCID http://orcid.org/0000-0002-8477-1106
Michael J RussellDipartimento di Chimica, Università degli Studi di Torino, Torino, Italy.
Elena BailoWITec GmbH, Ulm, Germany.ORCID http://orcid.org/0000-0003-3440-7223
Roberto CanteriFBK-Fondazione Bruno Kessler, Trento, Italy.ORCID http://orcid.org/0000-0002-0895-8884
Emanuele EnricoINRiM, Istituto Nazionale di Ricerca Metrologica, Torino, Italy.ORCID http://orcid.org/0000-0002-2125-5200
Alain ManceauISTerre, University of Grenoble-Alpes, CNRS, Grenoble, France.ORCID http://orcid.org/0000-0003-0845-611X
Assimo MarisDipartimento di Chimica "Giacomo Ciamician," Università di Bologna, Bologna, Italy.ORCID http://orcid.org/0000-0003-2644-0023
Murielle SaloméEuropean Synchrotron Radiation Facility, Grenoble, France.
Emilie ThomassotUniversité de Lorraine, CNRS, CRPG, Nancy, France.ORCID http://orcid.org/0000-0003-1809-8774
Nordine BoudenUniversité de Lorraine, CNRS, CRPG, Nancy, France.ORCID http://orcid.org/0000-0003-2097-5836
Rémi TucoulouEuropean Synchrotron Radiation Facility, Grenoble, France.
Axel HofmannDepartment of Geology, University of Johannesburg, Johannesburg, South Africa.ORCID http://orcid.org/0000-0002-8801-0443

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Subsurface habitats on Earth host an extensive extant biosphere and likely provided one of Earth's earliest microbial habitats. Although the site of life's emergence continues to be debated, evidence of early life provides insights into its early evolution and metabolic affinity. Here, we present the discovery of exceptionally well-preserved, ~3.42-billion-year-old putative filamentous microfossils that inhabited a paleo-subseafloor hydrothermal vein system of the Barberton greenstone belt in South Africa. The filaments colonized the walls of conduits created by low-temperature hydrothermal fluid. Combined with their morphological and chemical characteristics as investigated over a range of scales, they can be considered the oldest methanogens and/or methanotrophs that thrived in an ultramafic volcanic substrate.

Identifiers

PMID34261651
PMCPMC8279515

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.