Written & Researched by Leila Battison. Check out her channel:-
   / @somethingincredible  
Script & video edited & by Pete Kelly. Check out his channel:-
   / @petekellyhistory  
Narrated by David Kelly. Check out his channel:-
   / @voicesofthepast  

Thumbnail Art by Ettore Mazza
Artwork by Khail Kupsky

References:-
https://ui.adsabs.harvard.edu/abs/197...
https://cosmosmagazine.com/biology/ov...
https://ui.adsabs.harvard.edu/abs/201...
https://astrobiology.nasa.gov/mission...
https://helix.northwestern.edu/articl...

Image Credits:-
SIMS analysis of Primaevifilum amoenum, an Apex chert microfossil found in Western Australia, is interpreted to be a methane-consuming γ-Proteobacterium. Source: J.W. Schopf, UCLA.
https://astrobiology.nasa.gov/nai/art...
https://link.springer.com/referencewo...
https://en.wikipedia.org/wiki/Jack_Hi...
https://theconversation.com/how-we-di...
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...
By Didier Descouens - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index...
By Ruth Ellison - https://www.flickr.com/photos/laruth/..., CC BY 2.0, https://commons.wikimedia.org/w/index...