There is water on Mars!
Liquid water for that matter, held just below the surface, if the latest readings from NASA’s Curiosity rover are to be believed.
According to a paper published in Nature, which you can access here, humidity and temperature data collected from a full year of readings on the red planet indicate that the conditions are right for liquid brine to form on the surface of Mars. What’s more, instruments on board Curiosity have reportedly detected liquid water just below the surface, contradicting the previously held belief that temperatures on the red planet were too cold for water to exist outside of solid form.
These latest findings, which suggest that the soil below the Martian surface is moist with brine (the freezing point of which is significantly lowered due to the high levels of salt), were made by Curiosity as the rover attempts to climb Mount Sharp which lies in the middle of the giant Gale crater, a scar on the Martian surface 154km in diameter which has been home to the intrepid robot explorer since 2012.
Previous images from Curiosity’s camera have indicated the presence of old riverbeds where liquid water once flowed across the red planet and it is known that ice exists in the form of caps at the Martian poles. The existence of liquid water on our closest planetary neighbor however, is an important step forward in our understanding of the origins of life in the solar system, not to mention the search for traces of extra-terrestrial life itself.
So, should we get out the bunting and prepare to welcome little green men from the red planet to Earth? Not just yet. Even with the presence of liquid water, conditions on Mars remain hostile to life and it is still considered unlikely that there is anything living on the fourth rock from the sun, even below the surface.
In the paraphrased words of Ogilvy the astronomer, the chances of anything coming from Mars are still a million-to-one. But then again, if the late, great Terry Pratchett taught us anything, it’s surely that a million-to-one chances happen nine times out of ten. So a sci-fi nerd can always hope!
That’s all for now. TTFN!