The new Mars Rover just landed on Mars.
A small step for Curiosity, a big step for inter planetary geology!
One of its tasks is to look for evidence of water flow on the surface, which is crucial for life as we know it.
Back in 2006 it was asked to apply for a Phd that had come up, looking at the sedimentary facies (environments) on Mars to look for evidence of water flow. While I have no regrets about not following it up, at times like now its hard not to think "...what if"
So next time there are stars out at night, look for the brightest one and say Hello to Curiosity :)