New evidence of liquid water on Mars suggests the planet is geothermally active

brown circle of a planet with white covering bottom tip
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Scientists have found more evidence that liquid water exists beneath the ice cap at Mars’ south pole, which could mean the planet is geothermally active.

2018 has the European Mars Express Orbiter found that the surface of the ice cap covers the South Pole Mars sinks and rises, suggesting liquid water may be lurking beneath. But not all scientists were convinced at the time. Mars is extremely cold, and for subglacial water to exist in liquid form on the planet, there would need to be a source of heat, such as geothermal heat. At the time of the discovery of the Mars ExpressAs a result, some scientists thought that the strange radar signal measured by the spacecraft might be explained by something else, such as some kind of dry material beneath the ice caps.

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