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Multiple subglacial water bodies below the south pole of Mars unveiled by new MARSIS data
Rossi, Angelo Pio; Orosei, Roberto; Cartacci, Marco +10 more
The detection of liquid water by the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) at the base of the south polar layered deposits in Ultimi Scopuli has reinvigorated the debate about the origin and stability of liquid water under present-day Martian conditions. To establish the extent of subglacial water in this region, we a…
Anoxic chemical weathering under a reducing greenhouse on early Mars
Liu, J.; Xiao, L.; Michalski, J. R. +3 more
Reduced greenhouse gases such as methane (CH4) and hydrogen (H2) might be the only tenable solution to explain warming of the ancient Martian climate, but direct geological evidence that a reduced atmosphere actually existed on Mars has been lacking. Here we report widespread, strong Fe loss in chemically weathered bedrock se…