You'll no doubt be familiar with the dry, dusty appearance of Mars as it looks today – but scientists have found evidence of a vast ocean existing on the surface of the red planet around 3.5 billion years ago, likely covering hundreds of thousands...
It seems probable that a significant amount of change was happening on this part of the planet all those years ago, Cardenas explains. This is shown by the evidence of substantial sea level increases and the rapid movement of rocks by rivers and currents. Today, Aeolis Dorsa contains the most concentrated collection of fluvial ridges on Mars.
All this ties into the search for life on Mars. One of the most fundamental questions scientists are looking at in regards to the red planet is whether it has ever had conditions that are hospitable enough to be able to support life. "What immediately comes to mind as one the most significant points here is that the existence of an ocean of this size means a higher potential for life,""It also tells us about the ancient climate and its evolution. Based on these findings, we know there had to have been a period when it was warm enough and the atmosphere was thick enough to support this much liquid water at one time.
, some of the same researchers, including Cardenas, applied an acoustic imaging technique used to map ancient seafloors in the Gulf of Mexico to a model of how water may have eroded the surface of Mars. There are huge areas of what might be fluvial ridges all across Mars, and the simulations run by the team are remarkably similar to the shape of the landscape on the red planet – suggesting that there was extensive water coverage at one time.
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