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强有力的证据表明,生物发生是地球上的快速过程
1Department of Astronomy, Columbia University, New York, New York, USA.
Astrobiology
|April 17, 2025
概括
根据新的贝叶斯分析,生命可能在类似地球的行星上迅速出现. 来自最后一个普遍共同祖先 (LUCA) 的证据表明,生物发生是快速的,支持在合适的环境中快速出现生命.
科学领域:
- 天体生物学 天体生物学
- 行星科学 行星科学
- 生命的起源研究 生命的起源研究
背景情况:
- 在地球生物圈的寿命中出现智能生命的出现表明,生物发生可能是快速的.
- 弱的人类原理强调了复杂生命早期开始的必要性,考虑到行星生命的寿命.
- 以往使用微化石和碳同位素数据的分析没有为快速的生物发生提供足够的证据.
研究的目的:
- 通过客观贝叶斯分析来确定有利于快速生长而不是缓慢生长的几率比率.
- 评估最近的时间数据是否强化了生命迅速出现的假设.
- 评估生物发生时间对宇宙中生命的流行的影响.
主要方法:
- 客观贝叶斯分析应用于地球的时间数据.
- 计算快速与缓慢的生物生成场景的赔率比率.
- 纳入最近的地球时间学证据,包括最后一个通用共同祖先 (LUCA) 的日期.
主要成果:
- 微化石数据 (3.7 Gya) 给出了 3:1 的概率,有利于快速的生物发生.
- 碳同位素数据 (4.1 Gya) 给出了 9:1 的概率,有利于快速的生物发生.
- 4.2 Gya LUCA 估计将赔率比率推高至 10:1 的强有力的证据值,名义上达到 13:1.
结论:
- 第一次,有强有力的统计证据支持这样一个假设:在类似地球的条件下,生命迅速出现.
- 生命的迅速出现在所有被认为的生物圈寿命和投机的古代文明假设中得到了支持.
- 虽然类似地球的条件可能很少见,但数据表明,在这样的环境中,生命的出现可能是一个快速的过程.
关键词:
生物起源 生命的起源 贝叶斯主义相关概念视频
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