加速外太空生物进化:数值分析的启示

IF 3.1 2区 物理与天体物理 Q1 ENGINEERING, AEROSPACE Acta Astronautica Pub Date : 2024-09-28 DOI:10.1016/j.actaastro.2024.09.044
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引用次数: 0

摘要

随着人类继续进行太空探索,了解地外环境中的生物进化将变得至关重要。在地球上,生物已经适应了新的环境,一些遗传数据显示了积极的自然选择。高辐射和微重力等太空环境可能导致高突变率和正选择,本文通过数值分析研究了这些环境对生物进化的影响。它量化了地球以外的进化速度和新突变达到固定(种群内频率达到 100%)所需的时间。研究结果表明,有益突变的进化速度比地球快 1000 到 10000 倍,假设突变率比地球高 10-100 倍,则突变达到固定的时间缩短 0.002 到 0.004 倍。这些结果为包括太空设施设计、太空农业、天体生物学探索以及地球和太阳系以外的生命可持续性在内的各个领域提供了启示,揭示了外太空 "进化大爆炸 "的潜力。
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Accelerated biological evolution in outer space: Insights from numerical analysis
As humanity continues its space exploration, understanding biological evolution in extraterrestrial environments will become crucial. On Earth, organisms have adapted to new environments, and some genetic data indicate positive natural selection. This paper investigates the impact of space environments, such as high radiation and microgravity, which may lead to high mutation rates and positive selection, on biological evolution, using numerical analysis. It quantifies the evolutionary rates and the time until a new mutation reaches fixation (100 % frequency within population) beyond Earth. The findings reveal accelerated evolution rates, 1,000 to 10,000 times faster than on Earth for beneficial mutations, with the time until fixation being 0.002 to 0.004 times shorter, assuming mutation rates are 10–100 times higher. These results offer insights into various areas, including space facility design, space agriculture, astrobiological exploration, and life sustainability beyond Earth and Solar System, illuminating the potential for a ‘Big Bang of Evolution’ in outer space.
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来源期刊
Acta Astronautica
Acta Astronautica 工程技术-工程:宇航
CiteScore
7.20
自引率
22.90%
发文量
599
审稿时长
53 days
期刊介绍: Acta Astronautica is sponsored by the International Academy of Astronautics. Content is based on original contributions in all fields of basic, engineering, life and social space sciences and of space technology related to: The peaceful scientific exploration of space, Its exploitation for human welfare and progress, Conception, design, development and operation of space-borne and Earth-based systems, In addition to regular issues, the journal publishes selected proceedings of the annual International Astronautical Congress (IAC), transactions of the IAA and special issues on topics of current interest, such as microgravity, space station technology, geostationary orbits, and space economics. Other subject areas include satellite technology, space transportation and communications, space energy, power and propulsion, astrodynamics, extraterrestrial intelligence and Earth observations.
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