Because they both involve water, gravity and rocks. You're (plural) the ones who seem so confident that the two are different. This is what I would assume is going against the evidence available.
Let's see, can anyone think of anything else besides really big canyons that involves water, gravity, and rocks? You can do better than this, stipe. For the third time I'll point out that the processes being discussed here do not only involve the canyons themselves, but the entire regional landscape in which the canyons are contained. Which, surely you agree, are utterly different for the canyons under question, despite the similarity of the canyons themselves (and let's be clear on what this
similarity consists of: they're BIG. Right?)
If you want an answer to this I suggest you call him. He most likely isn't going to respond here. He might re-recant, but, to tell the truth, I don't think it's all that big a deal. The point is obvious enough without having to raise side issues in order to avoid it.
There
is an obvious point, and an obvious side issue, but I think you've got them switched. The
only evidence that the Grand Canyon and the (name of the Martian?) Canyon resulted from the same phenomena is that they are both
big, which counts as evidence only if you forgo that whole chain of logic requirement; and there's plenty of evidence that the circumstances surrounding these canyons were very different (the physical topology surrounding these canyons, for one thing!). So why do you keep wasting your mental energies on this side issue? Why not focus on the more important issue, namely the bad habit creationists have of dropping ideas whose flaws reach a certain critical level of embarrassment and then resurrecting them again when they think no one's looking?
Jukia said:
As I understand it, Pastor Bob raised the water all over Mars ala Noah before and recanted earlier, is that correct??
Jukia, I think Bob's point is that
scientists were saying this about Mars, the very same scientists who reject the idea of a global flood on Earth. Although to capture Bob's essence we'll have to say it again, this time with more ridicule: the
very same scientists who reject the idea of a global flood on Earth,
a planet that is even now 3/4 covered with water, are saying that Mars,
a planet with not the faintest trace of water, was once covered with a global layer of water.