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Updated: Jul 17, 2026
13:38
Laser-Induced Fluorescence Emission (L.I.F.E.) as Novel Non-Invasive Tool for In-Situ Measurements of Biomarkers in Cryospheric Habitats
Published on: October 26, 2019
The deep, hot biosphere
1Cornell University, Ithaca, NY 14853.
Summary
Deep Earth microbial life, independent of sunlight, thrives on chemical energy. This widespread subsurface biosphere may exist on other planets and throughout the universe.
Area of Science:
- Astrobiology
- Geomicrobiology
- Planetary Science
Background:
- Microbial life is increasingly found in Earth's deep crust and ocean vents.
- This life utilizes chemical energy sources, independent of solar energy and photosynthesis.
Purpose of the Study:
- To explore the implications of widespread subsurface microbial life.
- To consider the potential for similar life on other celestial bodies.
Main Methods:
- Review of existing data on deep subsurface microbial ecosystems.
- Comparative analysis of planetary conditions for subsurface habitability.
Main Results:
- Subsurface microbial life may be comparable in mass to surface life.
- It can explain biological molecules in carbonaceous materials, challenging surface-origin assumptions.
- Suitable subsurface conditions exist on many planetary bodies.
Conclusions:
- Earth's deep biosphere is a significant, underappreciated component of life.
- Subsurface life is a plausible widespread phenomenon in the solar system and beyond.
- The search for extraterrestrial life should consider subsurface environments.
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