Check out It’s Okay To Be Smart’s video for more about the origins of life on earth:    • Where Did Life Come From? (feat. PBS ...  
And check out PBS Space Time’s video on the physics of life:    • The Physics of Life (ft. It's Okay to...  

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The search for our origins goes back to a single common ancestor -- one that remains shrouded in mystery. It’s the ancestor of everything we know and today scientists call it the last universal common ancestor, or LUCA.

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References:
https://www.nature.com/articles/nmicr...
https://www.nytimes.com/2016/07/26/sc...
https://astrobiology.nasa.gov/news/lo...
http://microbialcell.com/researcharti...
http://www.actionbioscience.org/evolu...
http://we.vub.ac.be/~dglg/Web/Teachin...
http://www.mdpi.com/2075-1729/7/2/27/htm
https://link.springer.com/article/10....
https://www.ncbi.nlm.nih.gov/pmc/arti...
https://www.ncbi.nlm.nih.gov/pmc/arti...
https://www.cambridge.org/core/journa...
https://www.ncbi.nlm.nih.gov/pubmed/1...
https://www.ncbi.nlm.nih.gov/pubmed/2...
https://biologydirect.biomedcentral.c...
https://www.sciencedirect.com/science...
https://www.saylor.org/content/BIO_Ki...