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天体生物学——一种反对观点。

Astrobiology - an opposing view.

作者信息

Shapshak Paul

机构信息

Division of Infectious Diseases and International Health, Department of Internal Medicine, University of South Florida, Morsani College of Medicine, Tampa, FL 33606, USA.

出版信息

Bioinformation. 2018 Jun 30;14(6):346-349. doi: 10.6026/97320630014346. eCollection 2018.

Abstract

The use of quantum computers and Artificial Intelligence (AI) is imperative for use in space exploration and astrobiology investigations. Considerable progress has been made since the commencement of origin of life laboratory and theoretical studies in the mid 20th century. However, the sheer amount of data amassed to date in all these studies including exoplanetary and astrobiological studies is enormous and increasing steadily. Thus, there is the need for AI and quantum computers. As AI develops, it will become crucial in the development of the statistical and database programs that are indispensable to analyze the huge quantity of cumulative data. Diverse biotic and geochemical processes have been shown to produce methane on the Earth. Elsewhere in the solar system, on other planets (e.g. Mars) and moons (e.g. Titan), as well as on exoplanets, abiotic processes are considered the primary sources of methane. Astronomers and astro-biologists infer that the presence of methane supports the possibility of the presence of at least microbial life. In addition, on the Earth, there are also degradative reactions that include smog-related compounds and hazes that are produced as artefacts of intrinsic methane geochemistry as well as due to human footprint. Astronomers and astro-biologists envision life, away from the Earth, elsewhere in the solar system and on exoplanets, to occur under conditions similar or related to terrestrial life (goldilocks zone) conditions. These properties that are compatible with life as we know it on the Earth, include planetary orbits, gravitation, star radiant energy, presence of liquid water, and compatible temperatures and pressures, found on Earth. Generally, extraterrestrial life is also considered to resemble the biochemistry, molecular biology, and physiology of life on Earth - thus the focus on detection of supposed biosignatures of microbial life that resemble the Earth's. Nevertheless a crucial factor is absent in these deliberations - viruses. On the Earth, viruses that infect Archaea and bacteria form local and widespread global ecosystems. These viruses play a crucial role and facilitate the molecular transfer of host genes among various hosts. This essential function is underestimated in evolutionary as well as astrobiological speculations. Thus, it is of substantial importance to consider the roles that viruses may have played during the origin of life as well as in any exobiology.

摘要

量子计算机和人工智能在太空探索和天体生物学研究中的应用势在必行。自20世纪中叶生命起源实验室研究和理论研究开始以来,已经取得了相当大的进展。然而,到目前为止,在所有这些研究中积累的数据量,包括系外行星和天体生物学研究的数据量,是巨大的,并且在稳步增加。因此,人工智能和量子计算机是有必要的。随着人工智能的发展,它对于开发统计和数据库程序将变得至关重要,而这些程序对于分析大量累积数据是不可或缺的。在地球上,多种生物和地球化学过程已被证明会产生甲烷。在太阳系的其他地方,在其他行星(如火星)和卫星(如土卫六)以及系外行星上,非生物过程被认为是甲烷的主要来源。天文学家和天体生物学家推断,甲烷的存在支持了至少存在微生物生命的可能性。此外,在地球上,还存在降解反应,包括与烟雾相关的化合物和雾霾,它们既是甲烷地球化学固有产物,也是人类活动的结果。天文学家和天体生物学家设想,在太阳系其他地方以及系外行星上,远离地球的生命会在与地球生命(宜居带)条件相似或相关的条件下出现。这些与我们所知的地球上的生命兼容的特性,包括行星轨道、引力、恒星辐射能、液态水的存在以及地球上发现的兼容温度和压力。一般来说,外星生命也被认为类似于地球上生命的生物化学、分子生物学和生理学——因此重点在于检测与地球类似的假定微生物生命的生物特征。然而,在这些讨论中缺少一个关键因素——病毒。在地球上,感染古菌和细菌的病毒形成了局部和广泛的全球生态系统。这些病毒发挥着关键作用,并促进宿主基因在各种宿主之间的分子转移。这种基本功能在进化以及天体生物学的推测中被低估了。因此,考虑病毒在生命起源以及任何外星生物学中可能扮演的角色具有至关重要的意义。

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