What Was Earth Like 4 Billion Years Ago?

Written & researched by Leila Battison. Check out her channel:- https://www.youtube.com/channel/UCXIk7euOGq6jkptjTzEz5kQ Edited by Pete Kelly. Check out his channel:- https://www.youtube.com/channel/UCMq-bTjlaTZhaohEracnN6w Narrated by David Kelly. Check out his channel:- https://www.youtube.com/channel/UCqoGR_EedlhKDVuWNwYWRbg Art by Khail Kupsky Thumbnail art by Ettore Manza References:- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC31109/ https://ui.adsabs.harvard.edu/abs/2001Natur.412..708C/abstract https://science.sciencemag.org/content/338/6110/1047.full https://link.springer.com/article/10.1007/s004100050465 https://ui.adsabs.harvard.edu/abs/2001AGUFM.U52A0009M/abstract https://www.forbes.com/sites/quora/2018/07/11/what-did-the-moon-look-like-from-earth-4-billion-years-ago/#1c71bbdb1151 https://link.springer.com/referenceworkentry/10.1007%2F978-3-642-11274-4_11 https://geogallery.si.edu/10026559/acasta-gneiss https://www.britannica.com/place/North-America/Tectonic-evolution#ref469360 http://www.travelinggeologist.com/2014/10/acasta-gneiss-with-annie-bauer/ https://newsroom.ucla.edu/releases/moon-was-produced-by-a-head-on-collision-between-earth-and-a-forming-planet https://www.annualreviews.org/doi/pdf/10.1146/annurev.ea.15.050187.001415 https://www.britannica.com/science/Hadean-Eon https://forces.si.edu/atmosphere/02_02_01.html https://scijinks.gov/atmosphere-formation/ https://volcano.si.edu/learn_galleries.cfm?p=2 https://csmgeo.csm.jmu.edu/geollab/Fichter/Wilson/PTRC.html Extra thanks to:- Giuseppe Donatiello Slim Sepp H. Martin, Blaise Pascal University Pedroalexandrade Tim Bertelink http://www.nasa.gov/multimedia/imagegallery/image_feature_1454.html NASA/Colorado School of Mines/MIT/JPL/GSFC - http://www.nasa.gov/sites/default/files/grail20141001.jpg NASA / JPL / Doug Ellison NASA https://apod.nasa.gov/apod/ap140805.html