On the 28th of September, NASA revealed that they have found evidence of flowing water on the red planet. This is a huge scientific breakthrough for many reasons and something that is already drastically changing our views of Mars.
https://www.theguardian.com/science/2015/sep/28/nasa-scientists-find-evidence-flowing-water-mars
https://www.theguardian.com/science/2015/sep/28/nasa-scientists-find-evidence-flowing-water-mars