Mars May Still Be Geologically Active

Orbiter data (ExoMars Trace Gas Orbiter, 2021) show localized hydrogen‑chloride emissions and long fissures with mineral discoloration near a major volcano, which the authors interpret as gas release from magma or hydrothermal activity beneath the surface. If confirmed, these features imply recent geothermal heat and possible hydrothermal systems that could have preserved biosignatures or supported microbial life in Mars’ recent past. — Revising Mars from a geologically dead world to one with recent activity reshapes priorities for NASA/ESA missions, astrobiology funding, planetary protection rules, and public expectations about finding past life.