For a long while scientists had suspected that there is water to be found on Mars.
Recent discovery, along with some unusual studies of the Martian surface using a spectrometer suggests that liquid water runs down canyons and crater walls during summer months on this Red Planet. The discovery raises the chances of the planet being home to some forms of life.
Scientists studied the Martian terrain and found long, dark stains -- sometimes several hundred meters deep moving downhill with a fan-like pattern. This can only be explained by water trickles. They are not sure where the water water comes from, but suspect that it may rise from underground ice or salty aquifers or condense out of the thin Martian atmosphere.
But certainly the conclusion is that there is liquid water on the surface of Mars today.