posted on Sep, 13 2006 @ 01:42 PM
After something like 2 miles down, the temperature starts rising quite rapidly, I have read, and that makes it fairly difficult to dig too far into
the crust. Not to mention that there isn't really too much to dig for. The temperatures and distances make the rather pointless job quite hard.
If you are saying that both stopped at pretty much the same distance, I hadn't heard about that. It may be that since the US and USSR were fairly
similar technologically that their capabilities simply meant that they were each able to go about the same distance, and no farther.
If the earth really were hollow, then that would raise the question of why the earth is as massive as it is. If that mass is not inside the earth,
then where the heck is it? We know the volume of the earth, its diameter, and its gravitational pull. Since we know its gravitational pull, we know
its mass, and therefore we can find its density with the mass and volume. If the earth was hollow, the density calculation would have shown this in a
way so obvious that no one could argue with it.