What Was Earth Like 4 Billion Years Ago?

Written & researched by Leila Battison. Check out her channel:-
   / @somethingincredible  
Edited by Pete Kelly. Check out his channel:-
   / @petekellyhistory  
Narrated by David Kelly. Check out his channel:-
   / @voicesofthepast  
Art by Khail Kupsky
Thumbnail art by Ettore Manza

References:-
https://www.ncbi.nlm.nih.gov/pmc/arti...
https://ui.adsabs.harvard.edu/abs/200...
https://science.sciencemag.org/conten...
https://link.springer.com/article/10....
https://ui.adsabs.harvard.edu/abs/200...
https://www.forbes.com/sites/quora/20...
https://link.springer.com/referencewo...
https://geogallery.si.edu/10026559/ac...
https://www.britannica.com/place/Nort...
http://www.travelinggeologist.com/201...
https://newsroom.ucla.edu/releases/mo...
https://www.annualreviews.org/doi/pdf...
https://www.britannica.com/science/Ha...
https://forces.si.edu/atmosphere/02_0...
https://scijinks.gov/atmosphere-forma...
https://volcano.si.edu/learn_gallerie...
https://csmgeo.csm.jmu.edu/geollab/Fi...

Extra thanks to:-
Giuseppe Donatiello
Slim Sepp
H. Martin, Blaise Pascal University
Pedroalexandrade
Tim Bertelink
http://www.nasa.gov/multimedia/imageg...
NASA/Colorado School of Mines/MIT/JPL/GSFC - http://www.nasa.gov/sites/default/fil...
NASA / JPL / Doug Ellison
NASA https://apod.nasa.gov/apod/ap140805.html