Here's one sci-fi enthusiasts would love: Mars' south pole contains the largest deposit of frozen water found within the inner solar system. (This excludes our own planet, of course.) It's also been discovered that the area is covered with a layer of dust, which explains why the surface isn't as reflective of light as it should be.

It's been previously thought that the ice deposits in Mars were frozen carbon dioxide since 95% of Mars' atmosphere is made of the gas. The study - conducted by scientists at MIT and funded by the NASA Mars Program - proved otherwise by measuring the density of the frozen area using topographical and gravitational data gathered by three Mars orbiters.

Because of the carved out paths that runs through Mars' surface, it's been suspected that Mars held water. Now that we know the poles are made of ice, it's most possible that the paths really are dried up rivers that once flowed with water. Recent studies also gives credibility to the idea of Martian oceans. Not that it's a hint at alien life, but proof of Martian water still opens up a can of possibilities.