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More than 4 billion years ago, the crust of the Earth was still cooling and the oceans were only beginning to form. But in recent years, we’ve started to discover that, even in this hellish environment, life found a way.
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References:
www.sciencemag.org/news/2015/10/scientists-may-have-found-earliest-evidence-life-earth
www.latimes.com/science/la-sci-oldest-rocks-20151031-story.html
www.pnas.org/content/112/47/14518.full.pdf
www.ncbi.nlm.nih.gov/pmc/articles/PMC4664322/
www.nature.com/news/oldest-traces-of-life-on-earth-may-lurk-in-canadian-rocks-1.22685
nature.com/articles/doi:10.1038/nature24019
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