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Openai/6946e998-79f0-8007-9a65-19828450838d
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=== - Venus failed by overheating. It was pushed past a runaway greenhouse threshold that permanently eliminated water, shutting down every surface pathway to habitability. === * Mars failed by cooling. Its small size doomed its magnetic field and atmosphere, causing it to freeze and desiccate before life had time to do anything complex. * Earth alone achieved long-term climate stability, enabling billions of years of continuous evolution β the actual prerequisite for intelligent life. If desired, I can quantify the runaway-greenhouse flux thresholds, magnetic-dynamo cooling timescales, or provide a comparative timeline of habitability windows for all three worlds.
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