<blockquote><font class="small">In reply to:</font><hr /><p>Yeah, but the equations that an architect uses are quite different from those that an electrical engineer uses, no? Yes, it's all math, but there are differences in the KIND of math, the equations, that they use.<p><hr /></p></p></blockquote><br /><br />It's the exact same kind of math. Yes, they use different equations, but they are not incompatible; they are merely describing different things. The equations function in exactly the same way, according to exactly the same rules: the rules of mathematics. They both use algebra and calculus, for instance.<br /><br /><blockquote><font class="small">In reply to:</font><hr /><p>Also, plasma cosmologists have hypothesized about a mechanism that would account for the formation of the planet-sized scar that is the giant canyon Valles Marineris, also on Mars. Standard theory says that that massive canyon was carved by some as yet unknown geological process that they think involved liquid water and maybe some surface cracking. If that's the case, then where did all the eroded material go? There does not appear to be sufficient debris on the planet to support this notion. Plasma cosmologists, on the other hand, suggest that a process similar to electrical discharge machining, the common industrilal process for etching metals, was responsible for the scar.<p><hr /></p></p></blockquote><br /><br />If you object to there being no big mounds of silt downstream from Valles Marineris, you must also explain why there is no debris from this machining process. <img src="/images/icons/wink.gif" /> Okay, I'm being cheeky. But I don't think the eroded material in unaccounted for -- assuming it was carved by riverine processes. The material would likely be spread out all over Mars by now, given the rate of dust storms there. Personally, I favor the theory that it is almost entirely a crack, not the product of erosion, although there is clear evidence of erosive processes going on all around it, particula <div class="Discussion_UserSignature"> <p> </p><p><font color="#666699"><em>"People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint it's more like a big ball of wibbly wobbly . . . timey wimey . . . stuff."</em> -- The Tenth Doctor, "Blink"</font></p> </div>