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Related Experiment Videos

The seeding of life by comets.

J M Greenberg1, C X Mendoza-Gomez

  • 1Department of Astronomy and Physics, Leiden University, The Netherlands.

Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)
|January 1, 1992
PubMed
Summary
This summary is machine-generated.

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Early Earth may have received essential organic molecules from comets, potentially seeding life

Area of Science:

  • Astrobiology
  • Geochemistry
  • Planetary Science

Background:

  • Evidence suggests life existed on Earth ~4 Gyr ago, despite a hostile early environment.
  • The short timeframe available for prebiotic chemical evolution raises questions about life's origins.

Purpose of the Study:

  • To investigate the possibility of extraterrestrial organic molecule delivery to early Earth.
  • To explore comets as a source of prebiotic molecules and water.

Main Methods:

  • Analysis of data from space missions regarding comet composition and structure.
  • Review of theories on early Earth environments and interstellar dust chemistry.

Main Results:

  • Comets contain complex organic molecules formed from interstellar dust.

Related Experiment Videos

  • Comets are fluffy aggregates that can disperse material upon atmospheric entry.
  • Cometary impacts could have delivered both prebiotic molecules and water to early Earth.

    • Conclusions:

    • Comets likely served as a significant source of prebiotic molecules for early Earth.
    • This delivery mechanism resolves the temporal challenge for the origin of life.