Earth’s extended life window: life could endure for nearly two billion more years as the Sun brightens
New 3D climate-models suggest Earth could support life for roughly 1.0–1.9 billion more years as the Sun brightens; strong weathering drives CO2 down and most land plants die, while weak weathering keeps CO2 higher and lets some plants survive longer. The results are more optimistic than earlier estimates and note geoengineering or evolution could further extend the window.