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There is a larger network of secret lakes under the cover of Mars

In 2018, scientists made a discovery that could change our understanding of the dusty, dry red ball that is Mars.

Radar signals bounced from just below the planet's surface revealed a shining patch, consistent with nothing so much as an underground pool of liquid water. Subsequent searches turned up even more shiny patches, suggesting a whole network of underground lakes.

Groundbreaking stuff, right? Although Mars has water in the form of ice, to date not a single drop of the liquid stuff has ever been found on our red buddy.

There's just one problem. According to a new analysis, which has found dozens more of these shiny patches, some of them are in regions that are just too cold for liquid water, even a brine, which can have a lower freezing temperature than freshwater.

"We're not certain whether these signals are liquid water or not, but they appear to be much more widespread than what the original paper found," said planetary scientist Jeffrey Plaut of NASA's Jet Propulsion Laboratory.

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