Scientists simulate an Earth without life to help hunt for aliens and inhabited worlds

space.com Nov 8, 2026

Scientists simulate an Earth without life to help hunt for aliens and inhabited worlds

Curated by Shubham · TechCapsules · Nov 8, 2026

AI-summarised brief · reviewed before publication

Planetary scientist Samantha Gilbert‑Janizek at UC Riverside has created a computer model that simulates the evolution of a rocky planet without any biological activity. Building on Rory Barnes’s interior‑planet code, the new simulation adds surface and atmospheric processes, tracking 19 non‑biotic properties such as stellar heat input, core‑to‑surface heat and chemical exchange, and volcanic gas release. Starting with Earth at its formation 4.5 billion years ago, the model runs forward to 500 million years in the future, producing a lifeless world that still retains oceans and an atmosphere. Researchers can input the bulk characteristics of any exoplanet, run the model, and compare the predicted atmosphere with spectra from JWST or upcoming large telescopes. A mismatch suggests possible biological alteration, guiding follow‑up observations.

💡 Why It Matters

· By establishing a robust abiotic baseline, the tool lets astronomers separate false biosignature signals from genuine ones, sharpening the search for life on distant worlds.

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