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Is There Such a Thing as a Biosignature?

Christophe Malaterre1,2, Inge Loes Ten Kate3, Mickael Baqué4

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|November 14, 2023
PubMed
Summary
This summary is machine-generated.

Scientists need caution when using the term "biosignature" in astrobiology. Clear definitions and careful communication are crucial for accurately reporting potential signs of life, avoiding ambiguity and ensuring scientific rigor.

Keywords:
BioindicatorBiomarkerBiosignatureBiotracerExtraterrestrial lifeLife detection

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Area of Science:

  • Astrobiology
  • Planetary Science
  • Origin of Life Studies

Background:

  • The term 'biosignature' is critical in astrobiology for identifying potential signs of life.
  • Existing definitions and applications of 'biosignature' lack universal consensus, causing ambiguity.
  • The accelerating search for extraterrestrial life necessitates clearer terminology.

Approach:

  • Critically review the concept and nomenclature of biosignatures.
  • Analyze ambiguities and potential pitfalls in current usage.
  • Examine the implications of fuzzy boundaries between life and non-life.

Key Points:

  • Biosignature claims may overstate certainty due to data interpretation.
  • 'Biosignature' can be misleading due to the blurred line between life and non-life.
  • Conflicting definitions across disciplines create confusion in astrobiological research.

Conclusions:

  • Astrobiologists must use 'biosignature' cautiously in discussions of habitability and life.
  • Explicit definitions and careful selection of terms are vital for clear communication.
  • A checklist is provided to aid in assessing reported biosignature detections.