[kdbolt70]

I guess my biggest problem with this is that there is a finite amount of matter that makes up the earth. How does that "expand"? For the earth to the double in size, wouldn't it need twice the matter it originally possessed? Or is this assuming the matter of the earth is itself expanding, becoming less dense?

Also, how did the Himalayas get created? he said there was no great raisings of land.

Also, why does Mars "HAVE" to follow the exact same principal as earth? Why MUST there be plate tectonics on mars?

I apologize if any of these were already answered, didn't read everyone's comments.