Life exists on Earth but its existence has not been definitively proven on other planets/worlds. Biological activity might have existed on Mars and, in this respect, the ancient environments of the Red Planet may shed light on the environmental conditions of the ancient Earth. How life developed on our planet is far from fully understood. Whether the origin of life was exogenous (Section 7) or developed in peculiar and transient niches on Earth is still vigorously debated. However, planetary sciences and the geological record provide significant insight into relevant environmental conditions and timing. Although life can develop and persist in...

中文翻译：

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8.古代地球

生命存在于地球上，但尚未明确证明其存在于其他行星/世界上。在火星上可能已经存在生物活动，在这方面，红色星球的古代环境可能揭示了古代地球的环境条件。我们星球上的生命如何发展还远远没有被完全理解。关于生命的起源是外生的（第7节）还是在地球上特殊的和短暂的生态位中发展，仍然存在着激烈的争论。但是，行星科学和地质记录对相关的环境条件和时间安排提供了重要的见识。虽然生活可以发展并持续...