see the evidence there that water once flowed on surface of mars and suggested that the planet could have supported life billions of years ago, that is before cable tv. pebbles from mars, side by side with pebbles from earth. they say both rocks could only be created by flowing water. martha: i have to agree. they look very similar. cool stuff. let's talk about protests happening in europe dal. while the spanish government is set to reveal just how much trouble its banking system is really in. [explosion] [gunfire] [shouting]. martha: that is the scene in madrid over the course of this week. riot police clashing with protesters there. tens of thousands of angry people out there really complaining about another round of steep budget cuts. here's a little bit of