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Mars isn't dead - recent volcanic activity reveals it's just sleeping

Space • November 4, 2026 • general

Key Points:

New observations from the ESA's ExoMars Trace Gas Orbiter (TGO) suggest that Mars' volcanoes, including the massive Olympus Mons, may be dormant rather than extinct, indicating ongoing internal geological activity.
TGO detected hydrogen chloride gas escaping from volcanic fissures in the Alba Mons region, a sign of magmatic activity beneath the surface, which supports the idea of recent or intermittent volcanic activity on Mars.
The seasonal spikes of hydrogen chloride during Martian summer, particularly in the northern hemisphere, are linked to gas trapped by ice sublimating and releasing volcanic gases, reinforcing the volcanic origin of the emissions.
These findings imply that Mars retains enough internal heat to sustain volcanic activity, which could create habitable environments by interacting with groundwater, potentially supporting microbial life in subsurface hydrothermal systems.
The discovery encourages focusing future life-detection missions on volcanic regions like Alba Mons, where active hydrothermal processes might provide the necessary conditions for life to exist beneath the Martian surface.

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