A new study funded by NASA suggests between 30 to 99 percent of the 'missing' water is lurking within minerals inside the Red Planet's crust. The red planet features several ancient dried out valleys and river channels which have long pointed towards the possibility of liquid water once flowing there. The red planet features several ancient dried out valleys and river channels which have long pointed towards the possibility of liquid water once flowing there. If it did escape, the Red Planet's upper atmosphere would contain a larger amount of deuterium. The new study proposes a majority of Mars' water was trapped in the crust and some was lost in the atmosphere to explain the observed deuterium-to-hydrogen signal within the Martian atmosphere.

Source: Daily Mail March 16, 2021 22:22 UTC