There are most likely liquid water on Mars. The conclusion presented Nasa at a press conference today. The new evidence is important in several ways according to researchers.
– One is to better map the history of Mars. The second is that if we think of manned missions to Mars in the future so it is important to know if there is easy access to liquid water in place, because it is very difficult and expensive to drag along the water all the way there, says Maria Sundin, associate professor of theoretical physics at the University of Gothenburg.
but not least arouses the new evidence issue of possible life on Mars.
– It turns on that there is such an environment where life could perhaps have arisen or even remaining in, says Maria Sundin.
It has previously been known that there was water on Mars long ago. But now, researchers have been able to see the flow of the salt deposits that contain water that comes and goes at certain places on Mars depends on the seasons.
It’s not about some streams or lakes on the surface but it is a sure proof that there is liquid water on Mars, says Maria Sundin.
– Yes, it is. It sees clearly that these salts that are found they have been in contact with liquid water, and because they just come and go, you know that there are phenomena that formed right now. There is not any tracks we see of anything that happened millions of years ago.
Ulrika Björksten manage science radio.
– Water is essential for life, so why it is very interesting if you find liquid water beyond Earth. Then, one must remember that this may involve some water with extremely high salinity, and if so, then it is not certain that it is a prerequisite for life anyway.
published in Molecular Psychiatry 22 September. 
