Tinto River and Mars

Some recent findings from the Tinto River in Huelva, Spain indicate that life on Mars might be even more likely than we thought. At least on a bacterial scale.
Researchers from the Centre of Astrobiology discovered microorganisms living in salt deposits in Spain's Tinto River, which is an environment closely related to that of Mars. The idea is that these salt deposits, even though they are an extreme environment to live in, provide protection from radiation and hold in water, thus supplying microorganisms with a habitable sanctuary. Such deposits likely exist on Mars as well as other planets. They are a prime place to look for extraterrestrial organisms.
If you'd like to read more, check out this article.

Mars. Source