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Earth’s Ancient Sky May Have Supplied Ingredients for Life Before It Began
- New study models Earth’s prebiotic atmosphere generating sulfur biomolecules before life began.
- Simulated UV exposure yielded cysteine, taurine, and coenzyme M in a prebiotic atmosphere.
- The study estimates enough cysteine for a substantial early global ecosystem.
- Rain could have delivered sulfur compounds to oceans, aiding chemical evolution.
- The findings could influence interpretations of biosignatures on other worlds.
- Publication details: study appears in the Proceedings of the National Academy of Sciences.
- Researchers used a simulated early atmosphere to test sulfur chemistry.
- The work broadens the timeline for when life’s chemical building blocks could appear.
- The study highlights sulfur’s central role in biology and origin-of-life models.
- Findings may affect how scientists search for life on exoplanets.
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