Directed Panspermia Using Interstellar Comets

McKay, Christopher P.; Davies, Paul; Worden, S. P.

doi:10.1089/ast.2021.0188

Astrobiology

2022

DOI: 10.1089/ast.2021.0188

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Directed Panspermia Using Interstellar Comets

Christopher P. McKay

Paul Davies

S. P. Worden

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2024

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Rapid colonization of a space‐returned Ryugu sample by terrestrial microorganisms

Genge,

Almeida,

Van Ginneken

et al. 2024

Meteorit & Planetary Scien

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The presence of microorganisms within meteorites has been used as evidence for extraterrestrial life, however, the potential for terrestrial contamination makes their interpretation highly controversial. Here, we report the discovery of rods and filaments of organic matter, which are interpreted as filamentous microorganisms, on a space‐returned sample from 162173 Ryugu recovered by the Hayabusa 2 mission. The observed carbonaceous filaments have sizes and morphologies consistent with microorganisms and are spatially associated with indigenous organic matter. The abundance of filaments changed with time and suggests the growth and decline of a prokaryote population with a generation time of 5.2 days. The population statistics indicate an extant microbial community originating through terrestrial contamination. The discovery emphasizes that terrestrial biota can rapidly colonize extraterrestrial specimens even given contamination control precautions. The colonization of a space‐returned sample emphasizes that extraterrestrial organic matter can provide a suitable source of metabolic energy for heterotrophic organisms on Earth and other planets.

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Rapid colonization of a space‐returned Ryugu sample by terrestrial microorganisms

Genge,

Almeida,

Van Ginneken

et al. 2024

Meteorit & Planetary Scien

View full text Add to dashboard Cite

show abstract

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Directed Panspermia Using Interstellar Comets

Cited by 1 publication

References 65 publications

Rapid colonization of a space‐returned Ryugu sample by terrestrial microorganisms

Rapid colonization of a space‐returned Ryugu sample by terrestrial microorganisms

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