G'd afternoon Dave & Bum: I will never go look of them even if permission could be gtanted to enter the area, but in my short lifetime I have seen many solid theories over turned. I remember as a Pilot we were told by top officials in the New USAF that it was impossible to go beyond the speed of sound, now they do that 'vertically,' right after clearing the aitpory pattern .
tOn Tayopa I was merely told that out there some wheere is a legendary mine. So I embared on a camapaign to find it and now can / show tell exactly where it is.
As for The Grand canyon thingie, definitely have my tongue in my cheek, but am wiling to talk abut the possibility.
You are absolutely correct on all counts, and I've enjoyed your Tayopa stories immensely. I have no problems with mysteries being solved. I'd actually like to see
every mystery solved, and I'd like to see those stories told. That's my sly attempt at prodding you to get working on that book BTW.
And yes, exceeding the speed of sound used to be impossible. (Quite a silly idea really when you think about it, as we'd been exceeding the speed of sound with projectiles for several centuries by that point. But that's another matter.) Flight itself was originally impossible. When I was a kid, Pluto was still a planet. Eventually someone decides to challenge this, gathers the necessary evidence to prove it, and we adjust accordingly. In the former two cases, the counter theories (that supersonic flight is possible, and that flight itself is possible) are sensible theories to me. Perhaps some of this is due to the benefit of hindsight, as both of these achievements had occurred before I was born and had already been accepted as fact, but both of these achievements also had existing examples that proved them at least possible; we have been able to shoot a bullet faster than the speed of sound quite easily for a long time now, and birds and insects have been flying around without much trouble for as long as humans have been there to watch them. Both things were obviously possible for someone clever enough to work out the specifics.
But Egyptians in the Grand Canyon? I guess it's theoretically possible, but it's darned improbable. I'm also willing to discuss the possibility, but I'll want to see a fairly solid case before I take it seriously. And again, if someone made a discovery like this, would I be disappointed? Absolutely not! What a great story that would be! But we need evidence that this actually happened before we start working out the specifics of it, and we don't have that. (Yet?)
So perhaps your journey was on more solid footing. We know darned well that Spain and the Jesuits were associated with mining in Mexico, and we know that some of those mines were lost. To attempt to find one, after the proper research, would be an attempt to find something that is generally understood to exist. We don't have to speculate here. It was a solved mystery nonetheless, but it was a mystery with a known (or strongly suspected) answer. Attempting to find Atlantis would be on less solid footing, as it's not an established fact that it ever existed, and if it did, it might not be what we think it was. Attempting to find Egyptians in the Grand Canyon is even less certain, based on existing evidence and logic.
Anything is possible of course, but not everything is probable. When I don't have evidence, I rely on logic. Why the heck did the Egyptians want to go to the Grand Canyon? Let's start with that.
Bet stuff from American South West are "related" to Mu/Lemuria; stuff on East coast (American North East, down to Virginia) are Atlantis-"related". 
I think that I had read of it being in CA at one point...
, that there really isn't much territory here that hasn't been covered, if any at all. That's why research is so important. 
