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.
Watch this film on YouTube ↗Visual credits
11 sourcesSources and credits for imagery used in this film, including material incorporated into explanatory animations.
Confocal laser scanning microscopy images showing different microbial morphotyes in chimney samples
Aurélien Lecoeuvre, Bénédicte Ménez, Mathilde Cannat, Valérie Chavagnac & Emmanuelle Gérard
View original source ↗Source licence: CC BY 4.0Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.
DAPI-stained nuclei of HaCaT keratinocytes
Accuratelibrarian
View original source ↗Source licence: CC BY-SA 4.0Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.
Scientific image
Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.
Scientific image
Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.
E. coli Bacteria (7316101966)
NIAID
View original source ↗Source licence: Public domainIncorporated into an explanatory animation; presentation may include cropping, labels and overlays.
Oak tree Sunol Regional Wilderness California 2023 dllu
Daniel Lu ( User:dllu )
View original source ↗Source licence: CC BY-SA 4.0Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.
Diatom chain
Luca Santangeli (Arendt Lab, EMBL Heidelberg
View original source ↗Source licence: CC BY-SA 4.0Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.
A Hand
Gaurav Dhwaj Khadka
View original source ↗Source licence: CC BY-SA 4.0Incorporated 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.
View original source ↗Source licence: CC BY-SA 4.0Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.
Carl Woese
Don Hamerman
View original source ↗Source licence: CC BY 3.0Incorporated 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
View original source ↗Source licence: CC BY 2.0Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.
Research references
Selected sources from the episode’s research and scientific figures.
- 10.1038/s41559-024-02461-1 ↗
- LUCA-divtimes ↗
- Goldman et al. 2022 ↗
- Forterre 2024 ↗
- The Unfinished Reconstructed Nature of LUCA ↗
- 10.1126/sciadv.aef3128 ↗
- arXiv:2510.08410 ↗
- Phys.org ↗
- IMéP/CNRS ↗
- formal test ↗
- 2011 response ↗
- Microbial Diversity and Open Questions about the Deep Tree ↗
- The universal tree of life: an update ↗
- LUCA between ancient Earth chemistry and genetics ↗
- Replication machinery of LUCA ↗
- GTP before ATP ↗
- Evolution of Replication Machines ↗
- Archaeal DNA Replication ↗
- Open article ↗
- A tuneable minimal cell membrane reveals that two lipid species suffice for life ↗
- Allwood et al. ↗
- reassessment ↗
- What the earliest evidence for life tells us ↗
- LUCA and its complex virome ↗
- virosphere synthesis ↗
Music
- Meditation From The Star Orion
OctahedronMusic · Envato Elements
Footage and image usage
Credits and usage times retained from the published edition or its production credit record. Where present, times identify visual appearances, not documentary chapters. Source and licence corrections are listed in the visual credits above.
- Custom animations and figures: From Cosmos to Civilization. Third-party material incorporated into animations is credited on the linked sources page.
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 →