As humanity enters a transformative era of Mars exploration—guided by NASA's strategic Moon-to-Mars roadmap, rapid advances in commercial spaceflight capabilities, and the recent publication of the National Academies' comprehensive report, Science Strategy for the Human Exploration of Mars (2025)—we approach a pivotal moment in the search for extraterrestrial life. This paper systematically examines the profound scientific, societal, and spiritual implications of three potential outcomes in this quest: the definitive discovery of life, the confirmed absence of life, or persistent uncertainty. Drawing insights from contemporary Mars exploration efforts, international initiatives, and evolving ethical frameworks, we elucidate how each scenario could fundamentally impact biology, reshape planetary protection policies, influence global cooperation, and redefine humanity's philosophical and spiritual self-perception. Whether Mars ultimately provides evidence of a second genesis or underscores Earth's exceptional status, the pursuit itself compels deep reflection on our collective identity, moral responsibilities as planetary stewards, and our place within the cosmos, renewing appreciation for life's rarity, resilience, and intrinsic value.
Jiang et al. (Sun,) studied this question.
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