Mars is a completely dry planet with no water.
Why it is true
Mars has frozen water at the poles and underground. In 2018, scientists confirmed the existence of a lake of liquid water beneath the Martian south pole. NASA also found evidence of ancient rivers and dried-up lakes on the surface.
Source: ESA
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Related facts
Mercury has water ice at its poles despite being closest to the Sun.
A day on Mars is called a 'Sol' and lasts 24 hours and 37 minutes.
Trans-Neptunian objects can contain carbon dioxide and carbon monoxide ices.
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