▲ Peaking
Science
People think Earth dies when the Sun becomes a red giant in five billion years — the more likely end is a billion years from now, when a star already 30 percent brighter than at birth pushes CO₂ too low for C3 plants, then a moist greenhouse strips the oc
New articles argue Earth will become uninhabitable in a billion years, not five, as the Sun brightens and CO₂ drops for C3 plants.