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Water heavily fractionated as it ascends on Mars as revealed by ExoMars/NOMAD

Vandaele, Ann Carine; Aoki, Shohei; Liuzzi, Giuliano +15 more

Transient HCl in the atmosphere of Mars

Montmessin, Franck; Belyaev, Denis A.; Fedorova, Anna A. +23 more

A major quest in Mars' exploration has been the hunt for atmospheric gases, potentially unveiling ongoing activity of geophysical or biological origin. Here, we report the first detection of a halogen gas, HCl, which could, in theory, originate from contemporary volcanic degassing or chlorine released from gas-solid reactions. Our detections made …