Water is so essential for life on Earth that its presence is considered by scientists to be the most important indicator of potential habitability on alien worlds. For instance, Mars may have briefly had the right conditions to support life billions of years ago, when portions of its surface were awash in water, but it is unclear just how wet the red planet is today.
In 2018, scientists detected the possible presence of a salty water reservoir hidden about a kilometer under the icy Martian south pole. New observations now “strengthen the claim of the detection of a liquid water body” and “indicate the presence of other wet areas nearby,” according to a study published on Monday in Nature Astronomy.
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