Strange. I understand the point the slides are making: over geologic time periods, the erosion of rocks is very complicated. It certainly seems possible that

Strange. I understand the point the slides are making: over geologic time periods, the erosion of rocks is very complicated. It certainly seems possible that xenobiologists are saying "of course, the slides are spot-on"... But, as merely an MSEE/MSOtherStuff, the slides don't reduce my curiosity in the least*. My curiosity about this stuff could certainly be a personal thing/defect, so I don't want to discount the idea that winds and sand could produce the observed structure... But it certainly suggests more than a craggy geode. And here we brush the realm of Creationists: it's tempting to say that nothing but intelligent life could have produced the "door handle", but that's "irreducible complexity". The mere thought process that these two things could be linked produces two simultaneous thoughts: that's a door handle on Mars!!!!, because nothing natural could have produced it!!!; and, now I'm guilty of non-falsifiable thinking because I want it to be true.