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Originally Posted by 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?
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I think you hit it on the last part. Supposedly, the Earth's mantle (lava/magma) is twice as dense as the most desnse rock. But it's also fluid, and HOT...so the concept that it's expanding isn't suprising to me, at least. Heat up a filled ballon, or even steel....what happens? It expands. Pressurize a balloon...what happens when you let go? It expands.
Quote:
Originally Posted by kdbolt70
Also, how did the Himalayas get created? he said there was no great raisings of land.
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Personally -- I think there are still a few holes in his theory. This is one of them...there's
tons of mountain ranges on the planet...and there's islands like Hawaii. The only thing to explain those phenominon sufficiently, imo, is plate tectonics. But maybe the percieved movement of the plates is actually the earth's expansion?
