Episode 3.4 · 20 min

The Ancestor of All Cells

What the shared machinery of living cells reveals about LUCA, the last universal common ancestral population, and the deep split between bacteria and archaea.

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Visual credits

11 sources

Visual sources include third-party material incorporated into custom animations. License information is reproduced from source records; an unrecorded license does not mean a work is public domain.

  • Confocal laser scanning microscopy images showing different microbial morphotyes in chimney samples

    Aurélien Lecoeuvre, Bénédicte Ménez, Mathilde Cannat, Valérie Chavagnac & Emmanuelle Gérard

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • DAPI-stained nuclei of HaCaT keratinocytes

    Accuratelibrarian

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Scientific image

    Creator credit under review

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Scientific image

    Creator credit under review

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • E. coli Bacteria (7316101966)

    NIAID

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Oak tree Sunol Regional Wilderness California 2023 dllu

    Daniel Lu ( User:dllu )

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Diatom chain

    Luca Santangeli (Arendt Lab, EMBL Heidelberg

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • A Hand

    Gaurav Dhwaj Khadka

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Rod and sphere forms of Halobacterium salinarum NRC-1

    Helga Stan-Lotter and Sergiu Fendrihan. Photographs taken by Chris Frethem, University of Minnesota.

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Carl Woese

    Don Hamerman

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

  • Stromatolite (Dresser Formation, Paleoarchean, 3.48 Ga; Normay Mine, North Pole Dome, Pilbara Craton, Western Australia) 2 (47748432842)

    James St. John

    Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.

Research references

Selected sources from the episode’s research and scientific figures.

  1. 10.1038/s41559-024-02461-1 ↗
  2. LUCA-divtimes ↗
  3. Goldman et al. 2022 ↗
  4. Forterre 2024 ↗
  5. The Unfinished Reconstructed Nature of LUCA ↗
  6. 10.1126/sciadv.aef3128 ↗
  7. arXiv:2510.08410 ↗
  8. Phys.org ↗
  9. IMéP/CNRS ↗
  10. formal test ↗
  11. 2011 response ↗
  12. Microbial Diversity and Open Questions about the Deep Tree ↗
  13. The universal tree of life: an update ↗
  14. LUCA between ancient Earth chemistry and genetics ↗
  15. Replication machinery of LUCA ↗
  16. GTP before ATP ↗
  17. Evolution of Replication Machines ↗
  18. Archaeal DNA Replication ↗
  19. Open article ↗
  20. A tuneable minimal cell membrane reveals that two lipid species suffice for life ↗
  21. Allwood et al. ↗
  22. reassessment ↗
  23. What the earliest evidence for life tells us ↗
  24. LUCA and its complex virome ↗
  25. virosphere synthesis ↗

Music

  • Meditation From The Star Orion
    OctahedronMusic · Envato Elements

How this film was made

Created and editorially directed by Anders Lunde using a custom production system developed over six months. AI assists research, drafting, programming, and visual production; I review and edit the material and make the final editorial decisions. Narration uses text-to-speech. Visuals combine custom-built scientific animations, AI-generated reconstructions, and credited scientific imagery.

Generated reconstructions illustrate scientific interpretations. They are distinct from photographs, specimens, and measured data.

More about the creator and production →