地球の残り時間は約11億年──その計算方法
科学誌「The Scientific Drop」の記事によると、地球が生命を維持できる期間は約11億年と試算されている。太陽の光度が徐々に増加し、二酸化炭素濃度が低下することで植物の光合成が停止、生物圏全体が崩壊するという。このシナリオは温室効果ガスの影響や太陽系の進化に基づいて計算されており、人類が存続するための時間的な制約を示している。
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