Cosmology & Space (🚀🌠)Mars May Not Be Geologically Dead: The Hydrogen Chloride Signal Above Alba Mons
A European orbiter has found an unusual HCl signal over cracks in the flank of a giant Martian volcano. The discovery adds a new atmospheric line of evidence to the case for a still-active interior—and forces a sharper separation between volcanic chemistry, underground habitability, and proof of life.