Curiosity Travels Through Ancient Glaciers On Mars
NASA’s Mars Curiosity Rover has completed a Martian year –687 Earth days– this week. The vehicle travels through an arid and reddish landscape that was home to glaciers in the past. Ancient Mars held large quantities of water, yet its global hydro-geological cycles were very cold, so much so that they induced the presence of a giant ocean, partially ice-covered and rimmed by glaciers on the lower plains of the northern hemisphere.
Now, an international team of researchers has confirmed this global picture locally, on the Martian site where Curiosity is roving: Gale crater. “This crater was covered by glaciers approximately 3,500 million years ago, which were particularly extensive on its central mound, Aeolis Mons” points to SINC the lead investigator of the study Alberto Fairén, from the Centro de Astrobiología (INTA-CSIC) in Spain and Cornell University in the USA.
“However, at that time there were also rivers and lakes with very cold liquid water in the lower-lying areas within the crater,” adds the researcher, who highlights the fact that ancient Mars was capable of “maintaining large quantities of liquid water (an essential element for life) at the same time that giant ice sheets covered extensive regions of its surface”.