Story perspectives

Dark Microbes Thrive in Lava Caves, Hinting at Martian Life

11/28/2025

Summary

Story summary

Georgetown University researchers found dark microbes in lava tube caves rely on chemical energy from rocks or dead microbes, not light.
Photosynthesis cannot occur without light, so these microbes use rock-derived energy or organic matter.
Sulfur-eating microbes are scarce in oxygen-rich environments, suggesting they may thrive in low-oxygen Martian caves.
The team identified many previously unknown microbes, described as 'microbial dark matter,' potentially guiding future life searches in Martian caves.

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Story summary

Georgetown University researchers found dark microbes in lava tube caves rely on chemical energy from rocks or dead microbes, not light.
Photosynthesis cannot occur without light, so these microbes use rock-derived energy or organic matter.
Sulfur-eating microbes are scarce in oxygen-rich environments, suggesting they may thrive in low-oxygen Martian caves.
The team identified many previously unknown microbes, described as 'microbial dark matter,' potentially guiding future life searches in Martian caves.