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Barbara Kremer on Muck Rack

Barbara Kremer

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Articles

A Hadean timeline for the emergence of the RNA World

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By Oleg Abramov, Stephen J. Mojzsis, Anna Medvegy, Barbara Kremer
| Nature Verified
Abstract Estimates for when life emerged on Earth range from ca. 3.8 Ga (Eoarchean) to the Hadean eon (≥4.0-4.5 Ga). Here, we conclude that a proposed early stage of life – the RNA World – appeared at ca. 4.33 Ga by tracking the near-surface thermal stability of key biomolecules comprising postulated RNA organisms. We apply a global three-dimensional numerical model to analyse the thermal evolution profile of Hadean crust in response to late accretion bombardment.
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