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It only makes sense too, Bob. If, any of the readers here had ever visited a
salt mine, they would realize that the internal temperatures of the planet
build quickly the closer to the center you get. Olivine near the surface
might indicate a problem for us, but we might be an odd case compared to
other life forms.
Don't forget, people, that the center of our planet is nickel, and
possibly liquid nickel. That very feature rules out the possibility that
minerals like gold, diamond, and other such dense materials, could have
formed here at all. If, during school, you learned that diamonds and gold
are formed within the crust of the earth, you were taught incorrectly. Only
elements that occur 'above' nickel (from the periodic table) could have been
formed here at all. Not naturally, anyway. The pressures of this planet are
insufficient for that.
The building blocks of our planet are the result of a naturally evolving
universe. A universe that had been ongoing for billions of years in order
that our planet could even exist at all.
I once sat in on a lecture by Hawking's himself, where he speculated that
diamonds could (possibly only) be formed in the resulting explosion of a
supernova. When I shared this revelation with a geologist friend he nearly
had a fit! As he put it, "Hawking's is a smart guy, but he really missed the
mark here."
Somehow, I don't think so. It is much more likely that geologists have
been misled for decades. I trust Hawkings. :)
Oops! Boy did I digress!
Anyway, back to the topic at hand....
Didn't you miss a few moons of Mars? :)
Grim
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