Is the Underground Lake on Mars Just Volcanic Rock?

Is Mars home to an underwater lake? Different researchers are reaching different conclusions. Some say remote sensing from the Mars Express orbiter shows liquid water in an underground lake at Mars’ south polar region. Other researchers say clays or minerals explain the data better.

Who’s right? Maybe none of them.

A new study says that volcanic rock can explain the Mars Express data and that it’s a more plausible explanation.

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