Scientists have discovered gas escaping from fissures on Mars, suggesting the planet may still be volcanically active.
The ExoMars Trace Gas Orbiter detected hydrogen chloride above Alba Mons, a massive ancient volcano in Mars’ northern hemisphere.
Researchers believe the gas could be escaping from underground magma, with seasonal ice melting allowing it to reach the atmosphere.
If confirmed, volcanic heat could create underground environments where liquid water and microbial life might exist.