Irish scientists have become the latest to find evidence of liquid water flowing on Mars.
Just days after researchers in the United States said long gullies running down slopes on the red planet were caused by flowing water, a new study has found evidence of water existing under different conditions.
The new study, involving Dr Colman Gallagher from the School of Geography and Earth Institute at UCD, as well as Open University researchers, claims liquid water flowed beneath glaciers on Mars.
The scientists say eskers running out of a degraded glacier in the region known as Phlegra Montes could only have been formed by running water.
Eskers are ridges of glacial material which are created when water flows from the interior of the glacier.
The latest discovery provides further evidence to fuel the ongoing debate about whether Mars could sustain life.
Normally they only exist in glacial systems where melt water flowed out, the scientists says, but glaciers on Mars were thought to be dry.
The scientists say the discovery means large volumes of water must have flowed from under the glacier, and that the water did not freeze at the surface despite the cold temperatures.
Details of the study have been published in the journal Earth and Planetary Science Letters.