so can life exist in there? it's water right
"Although the surface of Mars was periodically wet and could have been hospitable to microbial life billions of years ago, the current environment at the surface is dry and subfreezing, probably presenting an insurmountable obstacle for living organisms. In addition, Mars lacks a thick atmosphere, ozone layer, and magnetic field, allowing solar and cosmic radiation strikes the surface unimpeded. The damaging effects of ionizing radiation on cellular structure is another one of the prime limiting factors on the survival of life on the surface."
So basically, if we want to create colonies on Mars, then we would have to build spaces that could hold life, protect us from environmental disasters and use the right technology to cultivate plants and that sort of stuff.