Episode 4.4b · 32 min
How Plants Got Chloroplasts
How a cyanobacterium became a chloroplast, how photosynthetic partnerships spread through other cells, and how cells began forming multicellular bodies.
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33 sourcesVisual 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.
Elodea cells under microscope
~delta
Cropped to a widescreen view; explanatory labels and chloroplast pointers added.
Red seaweed, South East Bay, Three Kings Islands PA111328
Peter Southwood
Framed for the opening montage; identifying label added.
Bancsó 2021 Fig 10-15 Spirogyra sp
Sándor Bancsó
Rotated 90° clockwise and resized for presentation; scale bar retained; explanatory labels and pointer added.
Gonium pectorale EPA
Environmental Protection Agency
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Volvox (250 23) Native preparation
Doc. RNDr. Josef Reischig, CSc.
Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.
Scientific figure · source page 3
Creator credit under review
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Chlamydomonas TEM 01
Dartmouth Electron Microscope Facility, Dartmouth College
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Scientific figure · source page 6
Silvia Ramundo et al.
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Scientific figure · source page 2
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Scientific figure · source page 2
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Miao et al. 2024 Figure 1 — Qingshania magnifica filament morphology
Lanyun Miao, Zongjun Yin, Andrew H. Knoll, Yuangao Qu, and Maoyan Zhu
Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.
Miao et al. 2024 Figure 2 — Qingshania magnifica filament across scales
Lanyun Miao, Zongjun Yin, Andrew H. Knoll, Yuangao Qu, and Maoyan Zhu
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Scientific figure · source page 3
Creator credit under review
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Scientific figure · source page 5
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Dictyostelium-Cells-Migrate-Similarly-on-Surfaces-of-Varying-Chemical-Composition-pone.0087981.s002
McCann C, Rericha E, Wang C, Losert W, Parent C
Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.
Chlamydomonas6-1
Dartmouth Electron Microscope Facility, Dartmouth College
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Flagellar-Kinematics-and-Swimming-of-Algal-Cells-in-Viscoelastic-Fluids-srep09190-s3
Qin B, Gopinath A, Yang J, Gollub J, Arratia P
Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.
Motic Europe - These are Gonium Pectorale swimming together with Pandorina Morum. Bo...
Motic Europe
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Eudorina - ボルボックスで観察する正の走光性 #volvox
Eudorina
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Volvox daughter colony
Depressedlymotivated
Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.
Kirsty Wan 🔬 - Cell division in the green microalga #Volvox carteri has both plant a...
Kirsty Wan 🔬
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Scientific figure · source page 2
Matthew D. Herron, Joshua D. Borin, Jacob C. Boswell, Jennifer Walker, I-Chen Kimberly Chen, Charles A. Knox, Michael Boyd, Frank Rosenzweig, and William C. Ratcliff
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Scientific figure · source page 3
Matthew D. Herron, Joshua D. Borin, Jacob C. Boswell, Jennifer Walker, I-Chen Kimberly Chen, Charles A. Knox, Michael Boyd, Frank Rosenzweig, and William C. Ratcliff
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Scientific figure · source page 2
Creator credit under review
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Scientific figure · source page 5
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Diatoms through the microscope
Prof. Gordon T. Taylor, Stony Brook University
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Emiliania huxleyi coccolithophore (PLoS)
Alison R. Taylor (University of North Carolina Wilmington Microscopy Facility)
Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.
Dinophysis tripos
Phycoplankton
Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.
Bancsó 2021 Fig 7-12 Euglena limnophila
Sándor Bancsó
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ねこのしっぽラボ - 渡良瀬遊水池のプランクトン。パウリネラ (Paulinella chromatophora)だよ。殻を持つアメーバの仲間(有殻アメーバ)...
ねこのしっぽラボ
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Paulinella chromatophora
Luis Delaye, Cecilio Valadez-Cano, Bernardo Pérez-Zamorano
Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.
Paulinella-chromatophora-a-b-Different-focal-planes-of-micrographs-of-P-chromatophora
Eva C. M. Nowack
Incorporated into an explanatory animation; presentation may include cropping, labels and overlays.
Scientific figure · source page 2
Eva C. M. Nowack, Michael Melkonian, and Arthur R. Grossman
View original source ↗Copyrighted material — used for documentary commentaryIncorporated into an explanatory animation; presentation may include cropping, labels and overlays.
Editorial use; no open license asserted.
Research references
Selected sources from the episode’s research and scientific figures.
- https://www.youtube.com/watch?v=n7RggKhWD8g ↗
- https://www.youtube.com/watch?v=C6MHQMufjq4 ↗
- https://www.youtube.com/watch?v=ahSUxWL2p0A ↗
- https://www.youtube.com/watch?v=Xy3kZ_h9l78 ↗
- https://www.pnas.org/doi/10.1073/pnas.1620089114 ↗
- https://www.pnas.org/doi/10.1073/pnas.2014294117 ↗
- https://cshperspectives.cshlp.org/content/6/4/a016105 ↗
- https://pmc.ncbi.nlm.nih.gov/articles/PMC7031061/ ↗
- https://pmc.ncbi.nlm.nih.gov/articles/PMC5650054/ ↗
- strassert 2021 molecular timescale ↗
- 2025 dating plastids chromatophores ↗
- https://www.pnas.org/doi/10.1073/pnas.1118800109 ↗
- https://pmc.ncbi.nlm.nih.gov/articles/PMC6384880/ ↗
- https://english.cas.cn/newsroom/news--archives/2024/research-news/202401/t20240124_1128931.shtml ↗
- https://www.frontiersin.org/journals/genetics/articles/10.3389/fgene.2022.787665/full ↗
- https://github.com/ozanbozdag/de_novo_evolution_of_macroscopic_multicellularity ↗
- DOI: 10.1038/s41586-023-06052-1 ↗
- DOI: 10.1093/gbe/evaf090 ↗
- DOI: 10.1038/ncomms11370 ↗
- DOI: 10.1038/s41598-019-39558-8 ↗
- DOI: 10.1111/brv.13001 ↗
- miao 2024 qingshania ↗
- DOI: 10.1126/sciadv.adk3208 ↗
- miao 2024 qingshania main ↗
- DOI: 10.1111/nph.71116 ↗
- DOI: 10.1073/pnas.1118800109 ↗
- DOI: 10.1038/s41598-017-02668-2 ↗
- A New Model and Dating for the Evolution of Complex Plastids of Red Alga Origin ↗
- DOI: 10.1073/pnas.2014294117 ↗
- DOI: 10.1073/pnas.1620089114 ↗
- DOI: 10.1093/molbev/msaf167 ↗
- DOI: 10.1029/2024GL109457 ↗
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 →