New interdisciplinary study pinpoints early Earth conditions that may have sparked RNA-based life
Researchers led by Oleg Abramov mapped how the Hadean Earth's environment evolved to support stable pre-biotic chemistry, highlighting a window when RNA-world life could emerge.
An interdisciplinary project headed by Oleg Abramov examined the Hadean era to determine when Earth’s surface became hospitable for lasting pre-biotic chemistry. Focusing on temperature trends and impact frequency, the researchers assessed how much crust remained permanently free from sterilizing collisions. They argue that once the heavy meteorite bombardment waned, energy-rich hydrothermal environments could have fostered the synthesis and preservation of key biomolecules.
This stable window likely occurred before the Archean, enabling the formation of RNA-based systems that later gave rise to the Last Universal Common Ancestor, whose molecular clock dates to between 4.09 and 4.33 billion years ago. The study provides a visual timeline that may serve as a first step toward understanding life’s origins.
Why it matters
Understanding when Earth first supported stable chemistry helps explain how life began and guides the search for life elsewhere.
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