Water (and maybe life) on Mars

This is an awesome discovery, one that promises to verify over a century of speculation with actual scientific observations. Remember those Martian "canals"?

Water doesn't necessarily mean life, of course, but still- even if life doesn't currently exist on the Red Planet, the presence of water would vastly increase the chances that it could sustain itself there in the future. Mark this date down in the history books.

The Guardian has more on this story here.