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Researched and Written by Leila Battison
Narrated and Edited by David Kelly
Thumbnail Art and Art by Ettore Mazza
Art by Khail Kupsky
Map by Adriano Bezerra

***REFERENCES IN A PINNED COMMENT***

Thanks to A. El Albani for the use of his videos and images from the article "Organism motility in an oxygenated shallow-marine environment 2.1 billion years ago.": https://www.pnas.org/content/116/9/3431

If you like our videos, check out Leila's Youtube channel:
   / @somethingincredible  

Music from Epidemic Sound and Artlist, stock footage from Videoblocks.

Image Credits:

Kola Borehole Building By Andre Belozeroff - Страница автора на Panoramio.com, CC BY-SA 3.0, https://commons.wikimedia.org/w/index...
Drill Bit By Urfin7 - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index...
Drill bits By Geolina163 - Self-photographed, CC BY-SA 3.0, https://commons.wikimedia.org/w/index...
MOHO map By AllenMcC. - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index...
2 billion year old rock By Anders Damberg, Geological Survey of Sweden SGU from Sweden - Värmland, CC BY 2.0, https://commons.wikimedia.org/w/index... biota microbial community By Benoit Potin - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index...
Pierrlate nuclear By Marianne Casamance - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index...
Urananite By Geomartin - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index...
Shield Volcano Ethopia By Hervé Sthioul - Own work, CC BY 2.5, https://commons.wikimedia.org/w/index...
Colombia supercontinent By Celiayangyy - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index...
Banded Iron Formations By James St. John - Jaspilite banded iron formation (Soudan Iron-Formation, Neoarchean, ~2.69 Ga; Stuntz Bay Road outcrop, Soudan Underground State Park, Soudan, Minnesota, USA) 53, CC BY 2.0, https://commons.wikimedia.org/w/index...
Banded Iron Formation Fortescue Falls By Graeme Churchard from Bristol, UK - Dales Gorge Uploaded by PDTillman, CC BY 2.0, https://commons.wikimedia.org/w/index...
Stanley Tyler Photo: Department of Geoscience, University of Wisconsin-Madison (Fair use)
Elsa Barghorn image (fair use)
Tree Fossil from Carboniferous By Michael C. Rygel - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index...
Stromatolites By James St. John (jsj1771) https://www.flickr.com/people/jsjgeol... - https://www.flickr.com/photos/jsjgeol..., CC BY 2.0, https://commons.wikimedia.org/w/index...
Stromatolite CC BY 2.0, https://commons.wikimedia.org/w/index...
Gunflint range Stromatolite By James St. John (jsj1771) https://www.flickr.com/people/jsjgeol... - https://www.flickr.com/photos/jsjgeol..., CC BY 2.0, https://commons.wikimedia.org/w/index...
Modern stromatolite By Paul Harrison - Photograph taken by Paul Harrison (Reading, UK) using a Sony CyberShot DSC-H1 digital camera., CC BY-SA 3.0, https://commons.wikimedia.org/w/index...
Franceville Biota By Ventus55 - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index...
Anthracite Coal By Amcyrus2012 - Own work, CC BY 4.0, https://commons.wikimedia.org/w/index... Coal By Amcyrus2012 - Own work, CC BY 4.0, https://commons.wikimedia.org/w/index...
Gunflint Microfossils Alleon, J. et al. Molecular preservation of 1.88 Ga Gunflint organic microfossils as a function of temperature and mineralogy. Nat. Commun. 7:11977 doi: 10.1038/ncomms11977 (2016).Cyanobacteria By CSIRO, CC BY 3.0, https://commons.wikimedia.org/w/index...
Franceville Biota Microfossils El Albani A, Bengtson S, Canfield DE, Riboulleau A, Rollion Bard C, et al., CC BY 3.0 https://creativecommons.org/licenses/..., via Wikimedia Commons
Kola borehole sealed shut By Rakot13 - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index...
Kola borehole By Bigest - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index...
Subduction Image By KDS4444 - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index...