Mars Facts
Everything you need to know about the Red Planet — in bite-sized form.
water-ice
Water Ice Exists at the Poles and Underground
Mars has confirmed water ice at both polar caps and in the shallow subsurface at mid-to-high latitudes, confirmed by the Mars Odyssey orbiter and the Phoenix lander's direct excavation. This is the most critical resource for any future human settlement.
Source: NASA Phoenix Lander